HAR2455_技术文档

Hardware

Documentation

Data Sheet

HAR^®24xy

High-Precision Dual-Die Programmable

Linear Hall-Effect Sensor Family

Edition Nov. 4, 2020

DSH000170_002EN

DATA SHEET

HAR 24xy

Copyright, Warranty, and Limitation of Liability

The information and data contained in this document are believed to be accurate and reli-

able. The software and proprietary information contained therein may be protected by

copyright, patent, trademark and/or other intellectual property rights of TDK-Micronas. All

rights not expressly granted remain reserved by TDK-Micronas.

TDK-Micronas assumes no liability for errors and gives no warranty representation or

guarantee regarding the suitability of its products for any particular purpose due to

these specifications.

By this publication, TDK-Micronas does not assume responsibility for patent infringements

or other rights of third parties which may result from its use. Commercial conditions, prod-

uct availability and delivery are exclusively subject to the respective order confirmation.

Any information and data which may be provided in the document can and do vary in

different applications, and actual performance may vary over time.

All operating parameters must be validated for each customer application by customers’

technical experts. Any mention of target applications for our products is made without a

claim for fit for purpose as this has to be checked at system level.

Any new issue of this document invalidates previous issues. TDK-Micronas reserves

the right to review this document and to make changes to the document’s content at any

time without obligation to notify any person or entity of such revision or changes. For

further advice please contact us directly.

Do not use our products in life-supporting systems, military, aviation, or aerospace

applications! Unless explicitly agreed to otherwise in writing between the parties,

TDK-Micronas’ products are not designed, intended or authorized for use as compo-

nents in systems intended for surgical implants into the body, or other applications

intended to support or sustain life, or for any other application in which the failure of the

product could create a situation where personal injury or death could occur.

No part of this publication may be reproduced, photocopied, stored on a retrieval sys-

tem or transmitted without the express written consent of TDK-Micronas.

TDK-Micronas Trademarks

– HAL

– HAR

Third-Party Trademarks

All other brand and product names or company names may be trademarks of their

respective companies.

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DATA SHEET

HAR 24xy

High-Precision Dual-Die Programmable Linear Hall-Effect Sensor Family

Release Note: Revision bars indicate significant changes to the previous edition.

1. Introduction

HAR 24xy is a dual-die programmable linear Hall-effect sensor family. It provides

redundancy as it consists of two independent dies stacked in a single package, each

bonded to a separate side of the leadframe. The stacked-die integration ensures that

both dies occupy the same magnetic field position, thus generating synchronous mea-

surement outputs.

The integrated dies are two HAR 24xy, universal magnetic-field sensors with linear ana-

log or PWM outputs based on the Hall effect. For both dies major characteristics like

magnetic field range, sensitivity, output quiescent voltage (output voltage at B=0 mT),

and output voltage range are programmable in non-volatile memories. The output char-

acteristics are ratiometric, which means that the output voltages are proportional to the

magnetic flux and the supply voltage. Additionally, both dies offer wire-break detection.

Each die of the HAR 24xy offers 16 setpoints to change the output characteristics from

linear to arbitrary or vice versa. They feature temperature-compensated Hall plates with

spinning current offset compensation, A/D converters, digital signal processing,

D/A converters with output driver (HAR 2425), programmable PWM output modules

(HAR 2455), EEPROMs with redundancy and lock function for calibration data, serial

interfaces for programming the EEPROMs, and protection devices at all pins. The inter-

nal digital signal processing prevents the signal being influenced by analog offsets, tem-

perature shifts, and mechanical stress.

The easy programmability allows individual adjustment of each HAR 24xy during the

final manufacturing process by means of a 2-point calibration, by adjusting the output

signals directly to the input signal (like mechanical angle, distance, or current). With this

calibration procedure, the tolerances of the sensor, the magnet-, and the mechanical

positioning can be compensated in the final assembly.

In addition, the temperature compensation of the Hall ICs can be fit to all common mag-

netic materials by programming first- and second-order temperature coefficients of the

Hall sensor sensitivity.

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DATA SHEET

HAR 24xy

It is also possible to compensate offset drift over temperature generated by the cus-

tomer application with a first-order temperature coefficient for the sensors offset. This

enables operation over the full temperature range with a high accuracy.

The calculation of the individual sensors characteristics and the programming of the

corresponding EEPROMs can easily be done with a PC and the application kit from

Micronas.

The sensors are designed for stringent industrial and automotive applications and

are AECQ100 qualified. They operate with typically 5 V supply voltage in the junc-

tion temperature range from 40 °C up to 170 °C. The HAR 24xy is available in the

ultra-thin shrink small outline 14 leads package TSSOP14-1.

1.1. Major Applications

Thanks to its redundancy capability, HAR 24xy can address safety-critical applications.

The sensors’ versatile programming characteristics and low temperature drifts make the

HAR 24xy the optimal system solution for:

– Angular measurements: throttle position, pedal position, steering torque and EGR

applications;

– Distance and linear movement measurements in safety-critical applications

– Magnetic-field and current measurement with specific resolution over different ranges,

by appropriate sensitivity programming for each die.

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HAR 24xy

1.2. Features

High-precision, redundant, linear Hall-effect sensor with two independent 12-bit analog

outputs (HAR 2425) or with two independent PWM outputs up to 2 kHz (HAR 2455).

Each die provides:

– 16 setpoints for various output signal shapes

– 16 bit digital signal processing

– Multiple customer-programmable magnetic characteristics in a non-volatile memory

with redundancy and lock function

– Programmable temperature compensation for sensitivity and offset

– Magnetic-field measurements in the range up to 200 mT

– Low output voltage drifts over temperature

– Active open-circuit (ground and supply line break detection) with 5 k pull-up and

pull-down resistor, overvoltage and undervoltage detection

– Programmable clamping function

– Digital readout of temperature and magnetic field information in calibration mode

– Programming and operation of multiple sensors at the same supply line

– Active detection of output short between two sensors

– High immunity against mechanical stress, ESD, and EMC

– Operation from T_J=40 °C up to 170 °C

– Operation from 4.5 V up to 5.5 V supply voltage in specification

and functions up to 8.5 V

– Operation with static magnetic fields and dynamic magnetic fields up to 2 kHz

– Overvoltage and reverse-voltage protection at all pins

– Short-circuit protected push-pull output

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DATA SHEET

HAR 24xy

2. Ordering Information

A Micronas device is available in a variety of delivery forms. They are distinguished by a

specific ordering code:

XXXNNNNPA-T-C-P-Q-SP

Further Code Elements

Temperature Range

Package

Product Type

Product Group

Fig. 2–1: Ordering Code Principle

For a detailed information, please refer to the brochure: “Micronas Sensors and Control-

lers: Ordering Codes, Packaging, Handling”.

2.1. Device-Specific Ordering Codes

The HAR 24xy is available in the following package and temperature variants.

Table 2–1: Available packages

Package Code (PA)

Package Type

GP

TSSOP14-1

Table 2–2: Available temperature ranges

Temperature Code (T)

Temperature Range

T = 40 °C to +170 °C

A

J

The relationship between ambient temperature (T_A) and junction temperature (T_J) is

explained in Section 5.3. on page 39.

For available variants for Configuration (C), Packaging (P), Quantity (Q), and Special

Procedure (SP) please contact Micronas.

Table 2–3: Available ordering codes and corresponding package marking

Ordering Code

Package Marking

HAR2425GP-A-[C-P-Q-SP] HAR2425A

HAR2455GP-A-[C-P-Q-SP] HAR2455A

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HAR 24xy

3. Functional Description

3.1. General Function

HAR 24xy is a dual-die integrated circuit. The two dies have independent pins for power

supply, ground, and output to guaranty full redundancy. Due to the stacked assembly

they are in the same magnetic field position, and thereby generating synchronous mea-

surement outputs. The HAR 2425 provides redundant output voltages proportional to

the magnetic flux through the Hall plates and proportional to the supply voltage (ratio-

metric behavior). The HAR 2455 offers PWM outputs.

The external magnetic field component perpendicular to the branded side of the pack-

age generates a Hall voltage. The Hall IC is sensitive to magnetic north and south polar-

ity. For each die this voltage is converted to a digital value, processed in the Digital Sig-

nal Processing unit (DSP) according to the settings of the EEPROM registers,

converted back to an analog voltage with ratiometric behavior and buffered by a push-

pull output transistor stage (HAR 2425) or output as PWM signal (HAR 2455).

The setting of a LOCK bit disables the programming of the EEPROM memory for all

time. This bit cannot be reset by the customer.

As long as the LOCK bit is not set, the output characteristic can be adjusted by pro-

gramming the EEPROM registers. The IC is addressed by modulating the output volt-

age.

In the supply voltage range from 4.5 V up to 5.5 V, the sensor generates an analog out-

put voltage (HAR 2425) or a PWM signal (HAR 2455). After detecting a command, the

sensor reads or writes the memory and answers with a digital signal on the output pin.

The analog output is switched off during the communication.

Several sensors in parallel to the same supply and ground line can be programmed

individually. The selection of each sensor is done via its output pin. For further informa-

tion, please refer to the document “HAL 24xy, HAR 24xy Programming Guide”.

The open-circuit detection provides a defined output voltage if the VSUP or GND line is

broken.

Internal temperature compensation circuitry and the spinning-current offset compensa-

tion enable operation over the full temperature range with minimal changes in accuracy

and high offset stability. The circuitry also reduces offset shifts due to mechanical stress

from the package. In addition, the sensor IC is equipped with overvoltage and reverse-

voltage protection at all pins.

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HAR 24xy

VSUP1

VSUP2

Internally

Stabilized

Supply and

Protection

Devices

Open-circuit,

Overvoltage,

Undervoltage

Detection

Temperature

Dependent

Bias

Protection

Devices

Oscillator

Digital

Signal

Processing

OUT1

OUT2

Linearization

16 Setpoints

D/A

Converter

Switched

Hall Plate

A/D

Converter

Analog

Output

EEPROM Memory

Lock Control

Programming

Interface

Temperature

Sensor

A/D

Converter

GND1

GND2

Fig. 3–1: HAR2425 block diagram

VSUP1

VSUP2

Internally

Open-circuit,

Temperature

Dependent

Bias

Stabilized

Supply and

Protection

Devices

Overvoltage,

Undervoltage

Detection

Protection

Devices

Oscillator

Digital

Signal

Processing

OUT1

OUT2

Linearization

16 Setpoints

PWM

Output

Switched

Hall Plate

A/D

Converter

EEPROM Memory

Lock Control

Programming

Interface

Temperature

Sensor

A/D

Converter

GND1

GND2

Fig. 3–2: HAR 2455 block diagram

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HAR 24xy

3.2. Signal Path and Register Definition

3.2.1. Signal Path

CFX

SETPT_IN

MIC_COMP

SETPT

CUST_COMP

Hall-Plate

Micronas

Customer

Offset & Gain

Trimming

Gain & Offset

Scaling block

DAC Gain

& Offset

Scaling

Setpoint

Linearization

A

Offset & Gain

Trimming

D

TEMP_ADJ

Micronas

Temp-Sensor

Trimming

DAC Drift

Compensation

Output

Clamping

- C -

Temp-Sensor

DAC

GAINOFF

DAC

Fig. 3–3: Signal path of HAR2425 (identical for both dies)

CFX

SETPT_IN

MIC_COMP

SETPT

CUST_COMP

Hall-Plate

Micronas

Customer

Offset & Gain

Trimming

Gain & Offset

Scaling block

DAC Gain

& Offset

Scaling

Setpoint

Linearization

A

Offset & Gain

Trimming

D

TEMP_ADJ

Micronas

Temp-Sensor

Trimming

Output

Clamping

PWM

Modulator

- C -

Temp-Sensor

OUT

GAINOFF

DAC

Fig. 3–4: Signal path of HAR 2455 (identical for both dies)

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DATA SHEET

HAR 24xy

3.2.2. Definition of Registers

The DSP is the major part of each die and performs the signal conditioning. The param-

eters for the DSP are stored in the EEPROM registers. The details are shown in Fig. 3–

5 and Fig. 3–7.

Terminology:

GAIN: Name of the register or register value

Gain: Name of the parameter

The sensors signal path contains two kinds of registers. Registers that are readout only

(RAM) and programmable registers (EEPROM & NVRAM). The RAM registers contain

measurement data at certain positions of the signal path and the EEPROM registers

have influence on the sensors signal processing.

3.2.2.1. RAM registers

TEMP_ADJ

The TEMP_ADJ register contains the calibrated temperature sensor information.

TEMP_ADJ can be used for the sensor calibration over temperature. This register has a

length of 16 bit and it is two’s-complement coded. Therefore the register value can vary

between 32768...32767.

CFX

The CFX register is representing the magnetic field information directly after A/D con-

version, decimation filter and magnetic range (barrel shifter) selection. The register con-

tent is not temperature compensated. The temperature variation of this register is spec-

ified in Section 4.13. on page 36 by the parameter RANGE_ABS

.

Note

During application design, it must be taken into consideration that CFX

should never overflow in the operational range of the specific application

and especially over the full temperature range. In case of a potential over-

flow the barrel shifter should be switched to the next higher range.

This register has a length of 16 bit and it is two’s-complement coded. Therefore the reg-

ister value can vary between 32768...32767. CFX register values will increase for pos-

itive magnetic fields (south pole) on the branded side of the package (positive CFX val-

ues) and it will decrease with negative magnetic field polarity.

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DATA SHEET

HAR 24xy

MIC_COMP

The MIC_COMP register is representing the magnetic field information directly after the

Micronas temperature trimming. The register content is temperature compensated and

has a typical gain drift over temperature of 0 ppm/k. Also the offset and its drift over

temperature is typically zero. The register has a length of 16 bit and it is two’s-comple-

ment coded. Therefore the register value can vary between 32768...32767.

CUST_COMP

The CUST_COMP register is representing the magnetic field information after the cus-

tomer temperature trimming. For HAR 2425 it is possible to set a customer specific gain

of second order over temperature as well as a customer specific offset of first order over

temperature. The customer gain and offset can be set with the EEPROM registers

TCCO0, TCCO1 for offset and TCCG0...TCCG2 for gain. Details of these registers are

described on the following pages.

The register has a length of 16 bit and it is two’s-complement coded. Therefore the reg-

ister value can vary between 32768...32767.

SETPT_IN

The SETPT_IN register offers the possibility to read the magnetic field information after

the scaling of the input signal to the input range of the linearization block. For further

details see the description of the EEPROM registers SCALE_GAIN and

SCALE_OFFSET that are described in the next chapter.

The register has a length of 16 bit and it is two’s-complement coded. Therefor the regis-

ter value can vary between 32768...32767.

SETPT

The SETPT register offers the possibility to read the magnetic field information after the

linearization of the magnetic field information with 16 setpoints. This information is also

required for the correct setting of the sensors DAC GAIN and OFFSET in the following

block.

The register has a length of 16 bit and it is two’s-complement coded. Therefore the reg-

ister value can vary between 32768...32767.

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HAR 24xy

GAINOFF

The GAINOFF register offers the possibility to read the magnetic field information after

the DAC GAIN and OFFSET scaling.

This register has a length of 16 bit and it is two’s-complement coded. Therefore the reg-

ister value can vary between 32768...32767.

DAC

The DAC register offers the possibility to read the magnetic field information at the end

of the complete signal path. The value of this register is then converted into an analog

output voltage.

The register has a length of 16 bit and it is two’s-complement coded. Therefore the reg-

ister value can vary between 32768...32767.

MIC_ID1 and MIC_ID2

The two registers MIC_ID1 and MIC_ID2 are used by Micronas to store production

information like, wafer number, die position on wafer, production lot, etc. Both registers

have a length of 16 bit each and are readout only.

PWM Frequency

The PWM frequency is selectable by 2 bits, which are part of the CUSTOMER SETUP register (bits

11:10). The CUSTOMER SETUP register is described on the following pages. The following four dif-

ferent frequencies can be used:

Table 3–1: Selectable PWM frequencies

PWM_FREQ

Frequency

Resolution

Bit 11

Bit 10

1

0

1

0

1

0

2 kHz

11 bit

12 bit

1 kHz

500 Hz

250 Hz

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HAR 24xy

DIAGNOSIS

The DIAGNOSIS register enables the customer to identify certain failures detected by

the sensor. HAR 2425 performs certain self tests during power-up of the sensor and

also during normal operation. The result of these self tests is stored in the DIAGNOSIS

register. DIAGNOSIS register is a 16 bit register.

Bit no. Function

Description

15:6

5

None

Reserved

State Machine

(DSP) Self test

This bit is set to 1 in case that the

statemachine self test fails.

(continuously running)

4

EEPROM Self test This bit is set to 1 in case that the

EEPROM self test fails.

(Performed during power-up only)

3

ROM Check

This bit is set to 1 in case that ROM

parity check fails.

(continuously running)

2

AD converter over- This bit is set to 1 in case the input sig-

flow

nal is too high, indicating a problem

with the magnetic range.

1:0

None

Reserved

Details on the sensor self tests can be found in Section 3.3. on page 23.

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HAR 24xy

PROG_DIAGNOSIS

The PROG_DIAGNOSIS register enables the customer to identify errors occurring dur-

ing programming and writing of the EEPROM or NVRAM memory. The customer must

either check the status of this register after each write or program command or alterna-

tively the second acknowledge. Please check the Programming Guide for HAR 24xy.

The PROG_DIAGNOSIS register is a 16 bit register. The following table shows the dif-

ferent bits indicating certain errors possibilities.

Bit No.

15:11

10

Function

Description

None

Reserved

Charge Pump Error

This bit is set to 1 in case that the

internal programming voltage was

to low

9

Voltage Error during

Program/Erase

This bit is set to 1 in case that the

internal supply voltage was to low

during program or erase

8

NVRAM Error

This bit is set to 1 in case that the

programming of the NVRAM failed

7:0

Memory Programming For further information please refer

to the Programming Guide for

HAL 242x

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HAR 24xy

3.2.2.2. EEPROM Registers

EEPROM

SCALE_GAIN

SCALE_OFFSET

SETPOINTx

TCCOx

TCCGx

DAC_GAIN

CUSTOMER SETUP

DAC_OFFSET

Hall-Plate

Micronas

Offset & Gain

Trimming

Customer

Offset & Gain

Trimming

DAC Gain

& Offset

Scaling

Offset & Gain

Scaling

Setpoint

Linearization

A

D

Digital Signal Processing

Temp-Sensor

- C -

Micronas

Temp-Sensor

Trimming

DAC Drift

Compensation

Output

Clamping

DAC

DAC_CMPLO

DAC_CMPHI

Fig. 3–5: Details of EEPROM and Digital Signal Processing for HAR 2425 (equal for both dies).

EEPROM

SCALE_GAIN

SCALE_OFFSET

SETPOINTx

TCCOx

TCCGx

DAC_GAIN

DAC_OFFSET

CUSTOMER SETUP

Hall-Plate

Micronas

Offset & Gain

Trimming

Customer

Offset & Gain

Trimming

DAC Gain

& Offset

Scaling

Offset & Gain

Scaling

Setpoint

Linearization

A

D

Digital Signal Processing

Temp-Sensor

- C -

Micronas

Temp-Sensor

Trimming

Output

Clamping

PWM

Out

DAC_CMPLO

DAC_CMPHI

Fig. 3–6: Details of EEPROM and Digital Signal Processing for HAR 2455 (equal for both dies).

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HAR 24xy

CUST_ID1 and CUST_ID2

The two registers CUST_ID1 and CUST_ID2 can be used to store customer informa-

tion. Both registers have a length of 16 bit each.

Barrel Shifter (Magnetic Ranges)

The signal path of HAR 24xy contains a Barrel Shifter to emulate magnetic ranges. The

customer can select between different magnetic ranges by changing the Barrel Shifter

setting. After decimation filter the signal path has a word length of 22 bit. The Barrel

Shifter selects 16 bit out of the available 22 bit.

The Barrel Shifter bits are part of the CUSTOMER SETUP register (bits 14...12). The

CUSTOMER SETUP register is described on the following pages.

Note

In case that the external field exceeds the magnetic field range the CFX

register will be clamped either to 32768 or 32767 depending on the sign

of the magnetic field.

Table 3–2: Relation between Barrel Shifter setting and emulated magnetic range

BARREL

SHIFTER

Used bits

Typ. magnetic range

0

1

2

3

4

5

6

22...7

21...6

20...5

19...4

18...3

17...2

16...1

not used

200 mT

100 mT

 50 mT

 25 mT

12 mT

 6 mT

Magnetic Sensitivity TCCG

The TCCG (Sensitivity) registers (TCCG0...TCCG2) contain the customer setting tem-

perature dependant gain factor. The multiplication factor is a second order polynomial

of the temperature.

All three polynomial coefficients have a bit length of 16 bit and they are two’s-comple-

ment coded. Therefore the register values can vary between 32768...32767. In case

that the target polynomial is based on normalized values, then each coefficient can

vary between 4 ... +4. To store each coefficient into the EEPROM it is necessary to

multiply the normalized coefficients with 32768.

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HAR 24xy

Example:

– Tccg0 = 0.5102 => TCCG0 = 16719

– Tccg1 = 0.0163 => TCCG1 = 536

– Tccg2 = 0.0144 => TCCG2 = 471

In case that the polynomial was calculated based on not normalized values of

TEMP_ADJ and MIC_COMP, then it is not necessary to multiply the polynomial coeffi-

cients with a factor of 32768.

Magnetic Offset TCCO

The TCCO (Offset) registers (TCCO0 and TCCO1) contain the parameters for tempera-

ture dependant offset correction. The offset value is a first order polynomial of the tem-

perature.

Both polynomial coefficients have a bit length of 16 bit and they are two’s-complement

coded. Therefore the register values can vary between 32768...32767.

In case that the target polynomial is based on normalized values, then each coefficient

can vary between 4 ... +4. To store each coefficient into the EEPROM it is necessary

to multiply the normalized coefficients with 32768.

In case that the polynomial was calculated based on not normalized values of

TEMP_ADJ and MIC_COMP, then it is not necessary to multiply the polynomial coeffi-

cients.

In addition HAR 24xy features a linearization function based on 16 setpoints. The set-

point linearization in general allows to linearize a given output characteristic by applying

the inverse compensation curve.

Each of the 16 setpoints (SETPT) registers have a length of 16 bit. The setpoints have

to be computed and stored in a differential way. This means that if all setpoints are set

to 0, then the linearization is set to neutral and a linear curve is used.

Sensitivity and Offset Scaling before Setpoint Linearization SCALE_GAIN/

SCALE_OFFSET

The setpoint linearization uses the full 16 bit number range 0...32767 (only positive val-

ues possible). So the signal path should be properly scaled for optimal usage of all 16

setpoints.

For optimum usage of the number range an additional scaling stage is added in front of

the set point algorithm. The setpoint algorithm allows positive input numbers only.

The input scaling for the linearization stage is done with the EEPROM registers

SCALE_GAIN and SCALE_OFFSET. The register content is calculated based on the

calibration angles. Both registers have a bit length of 16 bit and are two’s-comple-

mented coded.

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HAR 24xy

Analog Output Signal Scaling with DAC_GAIN/DAC_OFFSET (HAR 2425)

The required output voltage range of the analog output is defined by the registers

DAC_GAIN (Gain of the output) and DAC_OFFSET (Offset of the output signal). Both

register values can be calculated based on the angular range and the required output

voltage range. They have a bit length of 16 bit and are two’s-complemented coded.

Output Signal Scaling with DAC_GAIN/DAC_OFFSET (HAR 2455)

The required output duty cycle of the output is defined by the registers DAC_GAIN

(Gain of the output) and DAC_OFFSET (Offset of the output signal). Both register val-

ues can be calculated based on the angular range and the required output PWM duty

cycle range.

They have a bit length of 16 bit and are two’s-complemented coded.

Clamping Levels

The clamping levels DAC_CMPHI and DAC_CMPLO define the maximum and mini-

mum output voltage of the analog output. The clamping levels can be used to define the

diagnosis band for the sensor output. Both registers have a bit length of 16 bit and are

two’s-complemented coded. Both clamping levels can have values between 0% and

100% of V_SUP

.

3.2.2.3. NVRAM Registers

Customer Setup

The CUST_SETUP register is a 16 bit register that enables the customer to activate

various functions of the sensor like, customer burn-in mode, diagnosis modes, function-

ality mode, customer lock, etc.

Table 3–3: Functions in CUST_SETUP register

Bit No.

15

Function

None

Description

Reserved

14:12

Barrel Shifter

Magnetic Range

(see Section Table 3–2: on page 17)

11:10

None (HAR 2425)

Reserved

PWM frequency setting

(HAR 2455)

PWM frequency selection

(see Table 3–1 on page 13)

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HAR 24xy

Table 3–3: Functions in CUST_SETUP register, continued

Bit No.

Function

Description

9:8

Output Short Detection

0: Disabled

1: High & low side over current detection -> OUT =

V_SUPin error case

2: High & low side over current detection -> OUT =

GND in error case

3: Low side over current detection -> OUT =

Tristate in error case

7

Error Band (HAR 2425)

Error band selection for locked devices (Customer

Lock bit set).

0: High error band (V_SUP

)

1: Low error band (GND)

The sensor will always go to high error band as

long as it is not locked (Customer Lock bit not set).

(see Section 4.12. on page 35)

PWM Output Polarity (OP)

(HAR 2455)

0: PWM period starts with a high

pulse

1: PWM period starts with a low

pulse (effective after LC=1)

6

5

None

Reserved

Functionality

Mode

Supply voltage supervision

0: extended: undervoltage (POR) 3.8 V, overvolt-

age 9 V

1: normal: undervoltage (POR) 4.2 V, overvoltage

6 V

4

Communication Mode

(POUT)

Communication via output pin

0: Disabled

1: Enabled

3

2

Overvoltage Detection

Diagnosis Latch

0: Overvoltage detection active

1: Overvoltage detection disabled

Latching of diagnosis bits

0: No latching

1: Latched till next POR (power-on reset)

1

Diagnosis (HAR 2425)

Diagnosis (HAR 2455)

Customer Lock

0: Diagnosis errors force output to the selected

error band

1: Diagnosis errors do not force output to the

selected error band

0: Diagnosis errors force the PWM output into error

mode (see Table 3–5 on page 25)

1: Diagnosis errors do not force the PWM output

into error mode

0

Bit must be set to 1 to lock the sensor memory

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DATA SHEET

HAR 24xy

The Output Short Detection feature is implemented to detect a short circuit between two

sensor outputs. The customer can define how the sensor should signalize a detected

short circuit (see table above). The time interval in which the sensor is checking for an

output short and the detectable short circuit current are defined in Section 4.11. on

page 35.

This feature should only be used in case that two sensors are used in one module. In

case that the Output Short Detection is not active both sensors will try to drive their out-

put voltage and the resulting voltage will be within the valid signal band.

Note

The Output Short Detection feature is only active after setting the Cus-

tomer Lock bit and a power-on reset.

3.2.2.4. Setpoint Linearization Accuracy

The set point linearization in general allows to linearize a given output characteristic by

applying the inverse compensation curve.

For this purpose the compensation curve will be divided into 16 segments with equal

distance. Each segment is defined by two setpoints, which are stored in EEPROM.

Within the interval, the output is calculated by linear interpolation according to the posi-

tion within the interval.

4

x 10

4

3

2

1

0

-1

-2

Linearized

Distorted

-3

Compensation

-4

-3

-2

-1

0

1

2

3

4

x 10

Fig. 3–7: Linearization - Principle

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DATA SHEET

HAR 24xy

ys

n+1



yl

ys

n

xs xnl

n

xs

n+1

input

Fig. 3–8: Linearization - Detail

xnl: non linear distorted input value

yl: linearized value

 remaining error

The constraint of the linearization is that the input characteristic has to be a monotonic

function. In addition to that it is recommended that the input does not have a saddle

point or inflection point, i.e. regions where the input is nearly constant. This would

require a high density of set points

TDK-Micronas GmbH

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DATA SHEET

HAR 24xy

3.3. On-Board Diagnostic Features

The HAR 24xy is made of two completely separated dies, each featuring two groups of

diagnostic functions. The first group contains basic functions that are always active. The

second group can be activated by the customer and contains supervision and self-tests

related to the signal path and sensor memory.

Table 3–4 describes the HAR 24xy overall behavior in case of wiring faults.

Diagnostic Features that are Always Active:

– Wire-break detection for supply and ground line

– Undervoltage detection

– Thermal supervision of output stage: overcurrent, short circuit, etc. (HAR 2455)

Diagnostic Features that can be Activated by Customer:

– Overvoltage detection

– EEPROM self-test at power-on

– Continuous ROM parity check

– Continuous state machine self-test

– Adder overflow

Failure Indication for HAR 24xy

Each die indicates a fault immediately by switching the output signal to the selected

error band in case that the diagnostic mode is activated by the customer. The customer

can select if the output goes to the upper or lower error band by setting bit number 7 in

the CUST_SETUP register (Table 3–3 on page 19). Further details can be found in

Section 4.12. on page 35.

The sensor switches the output to tristate if an over temperature is detected by the ther-

mal supervision. The sensor switches the output to ground in case of a VSUP wire

break.

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DATA SHEET

HAR 24xy

Table 3–4: HAR 24xy behavior in case of faults

Short Circuit

to 5 V Supply

Short Circuit

to GND

Short Circuit

to Signal/s

Short Circuit

to Battery

(12 V)

Open Circuit

Component

Power

Supply

Normal

Component is

not supplied:

Wire break is

active  out-

put is tied to

ground.

Voltage drop

across extern

pull up resistor

is too big to

supply compo-

nent.

Supply above

recommended

operating con-

dition.

Component is

not supplied:

Wire break is

active  out-

put is tied to

ground.

See “Absolute

Maximum Rat-

ings” for stress

rating.

Output is not

predictable

because device

operates below

recommended

operating con-

dition.

Output is in

overvoltage

condition.

Component

Out Signal/s resistor is

bypassed by

External pull-up Output stage of Normal

Excess of Out-

put Voltage

over Supply

Voltage.

Component

component is

short circuit to

ground.

output is dis-

connected from

signal line. Sig-

nal line is pulled

up to 5 V by

short which is

below allowed

minimal pull-up

resistance.

See “Recom-

mended Oper-

ating

See “Absolute

Maximum Rat-

ings” for stress

rating.

external pull-up

resistor.

See “Recom-

mended Oper-

ating

Conditions” for

stress rating.

Conditions” for

stress rating.

Out = GND

Normal

Out = 5 V sup-

ply

Component

Ground

Component is

not supplied:

Wire break is

active  out-

put is tied to

5 V supply.

Component is

not supplied:

Wire break is

active  out-

put is tied to

5 V supply.

Component is

reversed

biased.

Component is

not supplied:

Wire break is

active  out-

put is tied to

5 V supply.

See “Absolute

Maximum Rat-

ings” for stress

rating.

Wire break is

active  Out ?

8.5 V

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DATA SHEET

HAR 24xy

Failure Indication for HAR 2455

The HAR 2455 indicates a failure by changing the PWM frequency. The different errors

are then coded in different duty-cycles.

Table 3–5: Failure indication for HAR 2455

Failure Mode

Frequency

Duty-Cycle

EEPROM and state machine

self-test

50%

95%

Adder overflow

Overvoltage

50%

85%

75%

100%

Undervoltage

Note

In case of an error the sensor changes the selected PWM frequency.

Example: During normal operation, the PWM frequency is 1 kHz, in case of

an error it is 500 Hz.

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DATA SHEET

HAR 24xy

3.4. Calibration of the Sensor

For calibration in the system environment, the application kit from Micronas is recom-

mended. It contains the hardware for the generation of the serial telegram for program-

ming and the corresponding LabView based programming environment for the input of

the register values (see Section 6.2. on page 43).

For the individual calibration of each sensor in the customer application, a two point cal-

ibration is recommended.

A detailed description of the calibration software example provided by Micronas, cali-

bration algorithm, programming sequences and register value calculation can be found

in the Application Note “HAR 24xy Programming Guide”.

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DATA SHEET

HAR 24xy

4. Specifications

4.1. Outline Dimensions

ꢀ0.1

5

Product

HAR24xy

A

X1

X2

0

7

6

5

4

1

3

2

B

0

Y1

0.21

0.3

Y2

D

A1

0.55

PIN 1 INDEX

A2

0.33

weight

0.054 g

1

.

1

2

0

.

Y

0

ꢀ

4

.

4

2

.

4

Y

B ( 20 : 1 )

6

X2

X1

gauge plane

D

ꢁ

center of

sensitive area

5

2

.

0

8

9

10 11 12 13

0.65

14

ꢀ0.1

0.6

ꢀ0.05

0.25

Sn plated

0,2ꢂ

A

B

C

ꢁ

Y1

B

Y2

5

0

.

ꢀ0.05

0.15

0

ꢀ

1

2

Sn plated

A

9

A

1

.

1

.

0

ꢀ

9

3

.

0

5

0

.

0

ꢀ

°

2

ꢀ

1

°

4

1

.

C

0

seating plane

0,1

ꢃ

C

1

.

0

ꢀ

3

ꢀ0.1

3.6

0

2.5

5 mm

scale

TOP VIEW

All dimensions are in mm.

Physical dimensions do not include moldflash.

Sn-thickness might be reduced by mechanical handling.

BOTTOM VIEW

JEDEC STANDARD

SPECIFICATION

ISSUE DATE

REVISION DATE

PACKAGE

ANSI

REV.NO.

1

DRAWING-NO.

(YY-MM-DD)

ITEM NO. ISSUE

MO-153

TYPE

NO.

TSSOP14-1

20-07-09

CTSSOP143012.1

F

ZG

2117_Ver.01

c

Fig. 4–1:

TSSOP14-1: Plastic Thin Shrink Small Outline Package; 14 pins; 0.9 mm thickness

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DATA SHEET

HAR 24xy

4.2. Soldering, Welding and Assembly

Information related to solderability, welding, assembly, and second-level packaging is

included in the document “Guidelines for the Assembly of Micronas Packages”.

It is available on the Micronas website (http://www.micronas.com/en/service-center/

downloads) or on the service portal (http://service.micronas.com).

4.3. Pin Connections and Short Descriptions

No

Pin Name

Type

Short Description

Die 1

2

3

4

6

VSUP1

GND1

SUPPLY

GND

Supply Voltage die 1

Ground die 1

GNDePad

OUT1

GNDePad

I/O

Ground ePad

Push-Pull Output (HAR 2425)

or

PWM Output (HAR 2455)

and Programming Pin Die 1

Die 2

9

VSUP2

GNDePad

GND2

SUPPLY

GNDePad

GND

Supply Voltage die 2

Ground ePad

11

12

Ground die 2

13

OUT2

I/O

Push-Pull Output (HAR 2425)

or

PWM Output (HAR 2455)

and Programming Pin Die 2

All not connected (NC) pins must be connected to GND. In case of redundancy require-

ments Micronas recommends the following grounding:

• GND plane1: Pin 1, 3, 5, 7

• GND plane2: Pin 8, 10, 12, 14

• GND plane3: Pin 4, 11

To avoid a separate GND plane3, please connect either pin 4 or pin 11 to the nearest

GND and leave the other pin not connected.

Note

To minimize mechanical stress to the dies, the exposed pad should not be

soldered!

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DATA SHEET

HAR 24xy

VSUP1

2

4

GNDePad

9 VSUP2

OUT1

Pin 6

OUT2

Pin 13

GND1

3 GNDePad 11 12 GND2

Fig. 4–2: Pin configuration

NC

1

2

3

4

5

6

7

14

13

12

NC

VSUP1

OUT2

GND2

GND1

GNDePad

NC

11 GNDePad

NC

10

VSUP2

NC

9

8

OUT1

NC

Fig. 4–3: Top/side view of the package.

4.4. Dimensions of Sensitive Area

250 x 250 µm²

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DATA SHEET

HAR 24xy

4.5. Absolute Maximum Ratings

Stresses beyond those listed in the “Absolute Maximum Ratings” may cause permanent

damage to the device. This is a stress rating only. Functional operation of the device at

these conditions is not implied. Exposure to absolute maximum rating conditions for

extended periods will affect device reliability.

This device contains circuitry to protect the inputs and outputs against damage due to

high static voltages or electric fields; however, it is advised that normal precautions

must be taken to avoid application of any voltage higher than absolute maximum-rated

voltages to this circuit.

All voltages listed are referenced to ground (GND1=GND2=GNDePad).

Symbol

Parameter

Min.

Max.

Unit Condition

V_SUP

Supply Voltage

VSUPx 8.5

18

10

18

V

t < 96 h⁴⁾

t < 1 h⁴⁾

V_OUT

Output Voltage

OUTx

6¹⁾

18

7

V

t < 1 h⁴⁾

V_OUT V_SUP

Excess of Output Voltage

over Supply Voltage

OUTx 



VSUPx

4)

T_J

Junction Temperature under

Bias

50

190²⁾°C

T_storage

Transportation/Short-Term

Storage Temperature

150

°C

Device only

without

packing

material

5)6)

V_{die-to-die isolation}Dielectric Strength between

Both Dies



500

500

+8

V

3)

V_ESD

ESD Protection

for Single Die

VSUP1 8

OUT1

kV

GND1

VSUP2

OUT2

GND2

1)

Internal protection resistor = 50 

2)

3)

4)

5)

6)

For 96h, please contact Micronas for other temperature requirements.

HBM AEC-Q-100-002 (100 pF and 1.5 k)

No cumulated stress

GNDs galvanic isolation not tested

Characterized on small sample size

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DATA SHEET

HAR 24xy

4.6. Storage and Shelf Life

Information related to storage conditions of Micronas sensors is included in the docu-

ment “Guidelines for the Assembly of Micronas Packages”. It gives recommendations

linked to moisture sensitivity level and long-term storage.

It is available on the Micronas website (http://www.micronas.com/en/service-center/

downloads) or on the service portal (http://service.micronas.com).

4.7. Recommended Operating Conditions

Functional operation of the device beyond those indicated in the “Recommended Oper-

ating Conditions/Characteristics” is not implied and may result in unpredictable behav-

ior, reduce reliability and lifetime of the device.

All voltages listed are referenced to ground (GND1=GND2=GNDePad).

Symbol Parameter

V_SUPSupply Voltage

Min. Typ. Max. Unit

Remarks

VSUPx 4.5

5.7

5

6

5.5

6.5

V

Normal operation

During programming

I_OUT

Continuous Output

Current

OUTx

1.2



1.2

5.5



mA

for HAR 2425

for HAR 2455

1.2



R_L

Load Resistor

OUTx

5.0

10

k

pull-up and pull-down

resistor for HAR 2425

1



pull-up resistor

for HAR 2455

C_L

Load Capacitance

OUTx

0.33 47

600

nF

for HAR 2425

for HAR 2455



0.18 10

N_PRG

Number of Memory

Programming

Cycles¹⁾



100

cycles 0°C < T_amb< 55°C

T_J

Junction



40

125

150

170

°C

8000 h ³⁾

2000 h ³⁾

1000 h ³⁾

Temperature²⁾

1)

In the EEPROM, it is not allowed to program only one single address within a 'bank' in the memory.

In case of programming one single address the complete bank has to be programmed.

2)

3)

Depends on the temperature profile of the application. Please contact Micronas for life time

calculations. Time values are not additive.

Time values are not cumulative.

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DATA SHEET

HAR 24xy

4.8. Characteristics

at T_J= 40 °C to +170 °C, V_SUP1=V_SUP2= 4.5 V to 5.5 V, GND1=GND2=GNDePad =

0 V after programming and locking, at Recommended Operating Conditions if not other-

wise specified in the column “Conditions”.

Typical Characteristics for T_J= 25 °C and V_SUP= 5 V.

Symbol Parameter

I_SUPSupply Current

Min. Typ. Max. Unit

Conditions

VSUPx



7

11

mA

over Temperature Range

1)

Resolution⁵⁾

OUTx



12



bit

HAR 2425: ratiometric to V_SUP

HAR 2455: depends on PWM

Period

t_r(O)

HAR 2425: Step Response

Time of Output⁶⁾



0.5

0.6

ms

C_L= 10 nF, time from 10% to

90% of final output voltage for a

step like signal B_stepfrom 0 mT

to B_max

HAR 2455: Response Time of

Output²⁾⁶⁾

OUTx



1.5

2.5

4.5

8.5

1.8

3

5.4

10.2

ms

f_PWM= 2 kHz

f

_PWM= 1 kHz

f

_PWM= 500 Hz

f_PWM= 250 Hz

DNL

INL

Differential Non-Linearity of D/A OUTx

Converter⁴⁾

0.9

0

0.9

LSB

Test limit at 25 °C ambient tem-

perature

Non-Linearity of Output Volt-

age over Temperature⁶⁾

OUTx

0.3



0.3

%V_SUP²⁾For V_out= 0.35 V ... 4.65 V;

V_SUP= 5 V ; Linear Setpoint

Characteristics

E_R

Ratiometric Error of Output

over Temperature

0.25

0.25

0.2

%

Max of [V_OUT5 V_OUT4.5and

V_OUT5.5 V_OUT5] at V_OUT= 10%

and 90% V_SUP

(Error in V_OUT/ V_SUP

)

V_offset

Offset Drift over Temperature

Range⁶⁾

0

0.1

%V_SUPV_SUP= 5 V ; BARREL SHIFTER

= 3 ( 50 mT)

V_OUT(B = 0 mT)_25°C

 V_OUT(B = 0 mT)_max

V_OUTCLAccuracy of Output Voltage at

Clamping Low Voltage over

Temperature Range⁵⁾

OUTx

11



11

mV

R_L= 5 k, V_SUP= 5 V

Spec values are derived from

resolution of the registers

DAC_CMPHI/LO and V_offset

.

V_OUTCHAccuracy of Output Voltage at

Clamping High Voltage over

Temperature Range⁵⁾

V_OUTH

V_OUTL

Upper Limit of Signal Band³⁾

Lower Limit of Signal Band³⁾

OUTx

93



%V_SUPV_SUP= 5 V, 1 mA I_OUT1 mA



7

¹⁾Output DAC full scale = 5 V ratiometric, Output DAC offset = 0 V, Output DAC LSB = V_SUP/4096

²⁾If more than 50% of the selected magnetic field range is used and the temperature compensation is suitable.

INL = V_OUT- V_OUTLSFwith V_OUTLSF= Least Square Fit through measured output voltage

³⁾Signal Band Area with full accuracy is located between V_OUTLand V_OUTH. The sensor accuracy is reduced below

V_OUTLand above V_OUTH

⁴⁾External package stress or overmolding might change this parameter

⁵⁾Guaranteed by Design

⁶⁾Characterized on small sample size, not tested

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DATA SHEET

HAR 24xy

Symbol Parameter

Min. Typ. Max. Unit

Conditions

t_POD

Power-Up Time (Time to Reach OUTx

Certain Output Accuracy)⁶⁾



1.7

8.0

ms

Additional error of 1% Full-Scale

Full accuracy

BW

Small Signal Bandwidth

OUTx



2



kHz

(3 dB)⁶⁾

V_OUTrmsOutput Noise Voltage RMS⁶⁾

OUT



1.5

mV

BARREL SHIFTER=3

Overall gain in signal path =1

External circuitry according to

Fig. 5–1 on page 38 with low-

noise supply

f_PWM

PWM Frequency

OUT

1.7

0.85

0.425 0.5

0.213 0.25

2

1

2.3

1.15

0.57

5

kHz

Customer programmable

(HAR 2455 only)²⁾⁶⁾

0.28

8

J_PWM

R_OUT

RMS PWM Jitter

OUT



1

2

LSB₁₂f_PWM= 1 kHz

(HAR 2455 only)²⁾⁶⁾

Output Resistance over Rec-

ommended Operating Range

10



V_OUTLmaxV_OUTV_OUTHmin

OUTx

TSSOP14-1 Package

Thermal resistance



R_thja

R_thjc

Junction to Ambient

Junction to Case

146

187

47

K/W

determined on 2s2p board

determined on 1s0p board

determined on 2s2p board

determined on 1s0p board

49

¹⁾Output DAC full scale = 5 V ratiometric, Output DAC offset = 0 V, Output DAC LSB = V_SUP/4096

²⁾If more than 50% of the selected magnetic field range is used and the temperature compensation is suitable.

INL = V_OUT- V_OUTLSFwith V_OUTLSF= Least Square Fit through measured output voltage

³⁾Signal Band Area with full accuracy is located between V_OUTLand V_OUTH. The sensor accuracy is reduced below

V_OUTLand above V_OUTH

⁴⁾External package stress or overmolding might change this parameter

⁵⁾Guaranteed by Design

⁶⁾Characterized on small sample size, not tested

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DATA SHEET

HAR 24xy

4.9. Open-Circuit Detection

at T_J= 40 °C to +170 °C, Typical Characteristics for T_J= 25 °C

Symbol Parameter

Output Voltage at Open

Min.

Typ.

Max.

Unit

Comment

V_OUT

0

0.15

V

V_SUP= 5 V

R_L= 10 kto 200 k

OUTx

VSUP Line

0

0.2

5.0

V

V_SUP= 5 V

R_L= 5 kto 10 k

V_OUT

Output Voltage at Open

GND Line

4.85

4.8

4.9

V_SUP= 5 V

R_L= 10 kto 200 k

OUTx

V

_SUP= 5 V

R_L= 5 kto 10 k

R_L: Can be pull-up or pull-down resistor

4.10. Overvoltage and Undervoltage Detection

at T_J= 40 °C to +170 °C, GND1=GND2=GNDepad=0V, Typical Characteristics for

T_J= 25 °C, after programming and locking

Symbol

Parameter

Min.

Typ.

Max.

Unit

Test Conditions

V_SUP,UV

Undervoltage Detection

Level

3.3

3.9

4.3

V

VSUPx

V_SUP,UVhystUndervoltage Detection

Level Hysteresis¹⁾



200

6.2



mV

V

VSUPx

V_SUP,OV

Overvoltage Detection

Level

5.6



6.9



V_SUP,OVhystOvervoltage Detection

225

mV

Level

Hysteresis¹⁾

¹⁾Characterized on small sample size, not tested

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DATA SHEET

HAR 24xy

4.11. Output Short Detection Parameter

at T_J= 40 °C to +170 °C, Typical Characteristics for T_J= 25 °C, after programming

and locking

Symbol

Parameter

Min.

Typ.

Max.

Unit

Test Conditions

t_OCD

Over Current Detection

Time¹⁾



128



µs

OUTx

t_Timeout

I_OVC

Time Period without Over

Current Detection¹⁾



256

10



ms

OUTx

Detectable Output Short

Current¹⁾

mA

¹⁾Characterized on small sample size, not tested

4.12. Output Voltage in Case of Error Detection

at T_J= 40 °C to +170 °C, Typical Characteristics for T_J= 25 °C, after programming

and locking

Symbol

Parameter

Min.

Typ.

Max.

Unit

Test Conditions

V_SUP,DIAG

Supply Voltage required to

get defined Output Voltage

Level¹⁾



2.1



V

VSUPx

V_Error,Low

V_Error,High

Output Voltage Range of

Lower Error Band¹⁾

0



4

%V_SUPV_SUP> V_SUP,DIAG

OUTx

5 k >= R_L<= 200 k

Output Voltage Range of

Upper Error Band¹⁾

96

100

%V_SUPV_SUP> V_SUP,DIAG

5 k >= R_L<= 200 k

¹⁾Characterized on small sample size, not tested

V_out[V]

5

V_SUP,OV

V_SUP,UV

V_SUP[V]

V_SUP,DIAG

: Output Voltage will be between V_SUPand GND





V_OUT4% V_SUP

: CUST_SETUP Register Bit no. 7 set to 1

: CUST_SETUP Register Bit no. 7 set to 0



V_OUT96% V_SUP

Fig. 4–4: Behavior of HAR 2425 for different V_SUP

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DATA SHEET

HAR 24xy

4.13. Magnetic Characteristics

at T_J= 40 °C to +170 °C, V_SUP1=V_SUP2= 4.5 V to 5.5 V, GND1=GND2=GNDePad =

0 V after programming and locking, at Recommended Operation Conditions if not other-

wise specified in the column “Conditions”.

Typical Characteristics for T_J= 25 °C and V_SUPx= 5 V.

Symbol

Parameter

Min.

Typ.

Max.

Unit

Test Conditions

SENS

Magnetic Sensitivity

V_OUT/(2xRANGE_ABS

)

mV/

mT

Example for HAR 2425:

For Barrel_shifter=5 and

V_OUT= 4 V

RANGE_ABS= 12 mT

Sensitivity=4 V/(2x12mT=

166 mV/mT typ.

DC/(2xRANGE_ABS

)

%DC/ Example for HAR 2455:

mT³⁾

For Barrel_shifter=5 and DC

= 100%

RANGE_ABS= 12 mT

Sensitivity=100%/(2x12 mT=

4.2%DC/mT max.

RANGE_ABS

Absolute Range of CFX

Register (Magnetic

Range)¹⁾



6



200

mT

Programmable:

See Table 3–2 for relation

between barrel shifter and

Magnetic Range.

B_Offset

B_Offset/T

ES

Magnetic Offset¹⁾

OUTx 0.4

0

0.4

5

mT

T/K

%

B = 0 mT, I_OUT= 0 mA,

T_J= 25 °C,

unadjusted sensor

Magnetic₁O₎ffset Change OUTx 5

B = 0 mT, I_OUT= 0 mA

BARREL SHIFTER = 3

( 50 mT)

due to T_J

Error in Magnetic

Sensitivity²⁾

OUTx



1%

2.5

V_SUP= 5 V

BARREL SHIFTER = 3

( 50 mT)

¹⁾Characterized on small sample size, not tested.

²⁾ES over the complete temperature range is tested on sample basis.

³⁾DC = duty cycle

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DATA SHEET

HAR 24xy

4.13.1. Definition of Sensitivity Error ES

ES is the maximum of the absolute value of the quotient of the normalized measured

value¹over the normalized ideal linear²value minus 1:

meas

ideal









-----------

ES = max abs

– 1



Tmin, Tmax

In the below example, the maximum error occurs at ^10 °C:

1.001

0.993

------------

ES =

– 1 = 0.8%

ideal 200 ppm/k

1.03

least-squares method straight line

of normalized measured data

measurement example of real

sensor, normalized to achieve a

value of 1 of its least-squares

method straight line at 25 °C

1.02

1.01

1.00

0.99

0.98

1.001

0.992

–25 ^-10

150

175

0

25

temperature [°C]

125

–50

50

75 100

Fig. 4–5: ES definition example

1. normalized to achieve a least-squares method straight line that has a value of 1 at 25 °C

2. normalized to achieve a value of 1 at 25 °C

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DATA SHEET

HAR 24xy

5. Application Notes

5.1. Application Circuit

For EMC protection, it is recommended to connect one ceramic capacitor, e.g. 47 nF,

between ground and the supply voltage, respectively the output voltage pin.

VSUP1

VSUP2

OUT1

OUT2

HAR 2425

47 nF

GND1 / GNDePad

Fig. 5–1: Recommended application circuit (analog output)

GND2

VSUP1

VSUP2

OUT1

OUT2

HAR 2455

47 nF

180 pF

GND1 / GNDePad

GND2

Fig. 5–2: Recommended application circuit (PWM output)

If the two dies are operated in parallel to the same supply and ground line, they can be

programmed individually as the communication with the sensors is done via their output

pins.

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DATA SHEET

HAR 24xy

5.2. Measurement of a PWM Output Signal of HAR 2455

In case of the PWM output, the magnetic field information is coded in the duty cycle of

the PWM signal. The duty cycle is defined as the ratio between the high time “s” and the

period “d” of the PWM signal (see Fig. 5–3).

Note

The PWM signal is updated with the rising edge. Hence, for signal evalua-

tion, the trigger-level must be the rising edge of the PWM signal.

Out

d

s

V

High

Low

time

Update

Fig. 5–3: Definition of PWM signal

5.3. Ambient Temperature

Due to the internal power dissipation, the temperature on the silicon chip (junction

temperature T_J) is higher than the temperature outside the package (ambient tempera-

ture T_A).

T_J= T_A+ T

The maximum ambient temperature is a function of power dissipation, maximum allow-

able die temperature, and junction-to-ambient thermal resistance (R_thja). With a maxi-

mum of 5.5V operating supply voltage the power dissipation P is 0.097 W per die, for a

total of 0.194 W. The junction to ambient thermal resistance R_thjais specified in

Section 4.8. on page 32.

The difference between junction and ambient air temperature is expressed by the

following equation:

T = P  R_thja= 16.5 °C

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DATA SHEET

HAR 24xy

Note

Note: The calculated self-heating of the device is only valid for the Rth test

boards. Depending on the application setup, the final results in an applica-

tion environment might deviate from these values.

5.4. Pad Size Layout

0.65 mm

0.4 mm

4.5 mm

7.2 mm

1.35 mm

4.3 mm

Fig. 5–4: Recommended pad size dimensions in mm

TDK-Micronas GmbH

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DATA SHEET

HAR 24xy

6. Programming of the Sensor

HAR 24xy features two different customer modes. In Application Mode the sensor pro-

vides an output signal. In Programming Mode it is possible to change the register set-

tings of the sensor.

After power-up the sensor is always operating in the Application Mode. It is switched

to the Programming Mode by a pulse on the sensor output pin.

6.1. Programming Interface

In Programming Mode the sensor is addressed by modulating a serial telegram on the

sensors output pin. The sensor answers with a modulation of the output voltage.

A logical “0” is coded as no level change within the bit time. A logical “1” is coded as a

level change of typically 50% of the bit time. After each bit, a level change occurs (see

Fig. 6–1).

The serial telegram is used to transmit the EEPROM content, error codes and digital

values of the angle information from and to the sensor.

t

bittime

or

logical 0

t

bittime

or

logical 1

50%

Fig. 6–1: Definition of logical 0 and 1 bit

A description of the communication protocol and the programming of the sensor is avail-

able in a separate document (Application: HAR 2425 Programming Guide).

TDK-Micronas GmbH

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DATA SHEET

HAR 24xy

Table 6–1: Telegram parameters (All voltages are referenced to GND1=GND2=GNDePad = 0 V)

Symbol

Parameter

Limit Values

Unit Test Conditions

Min.

Typ.

Max.

V

Voltage for Output Low OUTx

Level during Program-

ming through Sensor

Output Pin

0



0.2*V

1

V

OUTL

SUP

V

for V

= 5 V

SUP

Voltage for Output High OUTx

Level during Program-

ming through Sensor

Output Pin

0.8*V

4



V

SUP

V

OUTH

SUP

5.0

for V

V

Voltage for

SUP

VSUPx 5.7

6.0

6.5

V

Supply voltage for

bidirectional com-

munication via out-

put pin.

SUPProgram

EEPROM program-

ming (after PROG and

ERASE)

t

Biphase Bit Time

Slew rate

OUTx

900

1000

2

1100

µs

bittime



V/µs

TDK-Micronas GmbH

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DATA SHEET

HAR 24xy

6.2. Programming Environment and Tools

For the programming of HAR 24xy it is possible to use the Micronas tool kit (HAL-APB

V1.x & LabView Programming Environment) or the USB kit in order to ease the product

development. The details of programming sequences are also available on request.

6.3. Programming Information

For reliability in service, it is mandatory to set the LOCK bit to one and the POUT bit to

zero after final adjustment and programming of HAR 2425.

The success of the LOCK process must be checked by reading the status of the LOCK

bit after locking and by a negative communication test after a power on reset.

It is also mandatory to check the acknowledge (first and second) of the sensor or to

read/check the status of the PROG_DIAGNOSIS register after each write and store

sequence to verify if the programming of the sensor was successful. Please check HAR

24xy Programming Guide for further details.

Electrostatic Discharges (ESD) may disturb the programming pulses. Please take pre-

cautions against ESD.

Note

Please check also the “HAL 24xy Programming Guide”. It contains addi-

tional information and instructions about the programming of the devices.

TDK-Micronas GmbH

Nov. 4, 2020; DSH000170_002EN

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DATA SHEET

HAR 24xy

7. Document History

1. Advance Information: “HAR 24xy High-Precision Dual-Die Programmable Linear Hall-Effect

Sensor Family”, May 23, 2015, AI000179_001EN. First release of the advance information.

2. Data Sheet: “HAR 24xy High-Precision Dual-Die Programmable Linear Hall-Effect Sensor Family”,

July 14, 2015, DSH000170_001EN. First release of the data sheet.

Major changes:

– Absolute Maximum Ratings on page 30:

Value V_{die-to-die isolation}

– Recommended Operating Conditions on page 31:

junction temperature conditions specified

– Application Circuit on page 38

– Recommended pad size dimensions in mm on page 40

– TSSOP14 tape and reel finishing added

3. Data Sheet: “HAR 24xy High-Precision Dual-Die Programmable Linear Hall-Effect Sensor Family”,

Nov. 4, 2020, DSH000170_002EN. Second release of the data sheet.

Major changes:

– Outline Dimensions on page 27:

TSSOP14 package drawing updated

– Absolute Maximum Ratings on page 30:

T

_storageadded

– Recommended Operating Conditions on page 31:

new values for parameters I_OUTand R_L

– Characteristics on page 32:

new values for parameters VOUT

and I_SUP

rms

– Magnetic Characteristics on page 36:

new values for parameters SENS and RANGE_ABS

TDK-Micronas GmbH

Hans-Bunte-Strasse 19  D-79108 Freiburg  P.O. Box 840  D-79008 Freiburg, Germany

Tel. +49-761-517-0  Fax +49-761-517-2174  www.micronas.tdk.com

TDK-Micronas GmbH

Nov. 4, 2020; DSH000170_002EN

44


型号：	HAR2455
厂家：	TDK ELECTRONICS
描述：	线性霍尔传感器传感器
文件：	总44页 (文件大小：537K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

HAR2455 [TDK]

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