APS13295 [ALLEGRO]

Precision Hall-Effect Switch for Consumer and Industrial Applications;


型号：	APS13295
厂家：	ALLEGRO MICROSYSTEMS
描述：	Precision Hall-Effect Switch for Consumer and Industrial Applications
文件：	总14页 (文件大小：656K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

APS13295

Precision Hall-Effect Switch

for Consumer and Industrial Applications

FEATURES AND BENEFITS

DESCRIPTION

The APS13295 Hall-effect switch is a three-wire, planar

Hall-effect sensor integrated circuit (IC) especially suited for

operation over extended temperature ranges (up to 125°C).

• Unipolar switchpoints

• Superior ruggedness and fault tolerance

• Reverse-polarity and transient protection

• Operation from –40°C to 175°C junction temperature

• Output short-circuit and overvoltage protection

• Superior temperature stability

This Hall-effect switch IC is ideal for industrial and consumer

applicationsandfeaturesperformanceenhancementspermitting

high-temperatureoperationupto175°Cjunctiontemperatures.

In addition, the APS13295 includes a number of features

designed specifically to maximize system robustness such as

reverse-polarityprotection,outputcurrentlimiter,overvoltage,

and EMC protection.

• Resistant to physical stress

• High EMC immunity, ±12 kV HBM ESD

• Operation from unregulated supplies, 2.8 to 24 V

• Chopper stabilization

• Solid-state reliability

The single silicon chip includes: a voltage regulator, a Hall

plate, small signal amplifier, chopper stabilization, Schmitt

trigger, and a short-circuit-protected open-drain output. A

south pole of sufficient strength turns the output on. Removal

of the magnetic field—or a north pole—turns the output off.

The devices include on-board transient protection for all pins,

permitting operation directly from unregulated or regulated

supplies from 2.8 to 24 V.

• Industry-standard packages and pinouts

PACKAGES:

Not to scale

3-pin SIP

(suffix UA)

Twopackagestylesprovideachoiceofthrough-holeorsurface

mounting. Package type LH is a modified SOT23W, surface-

mount package, while UA is a three-lead ultra-mini SIP for

through-hole mounting. Both packages are lead (Pb) free and

RoHs compliant with 100% matte-tin leadframe plating.

3-pin SOT23W

(suffix LH)

Functional Block Diagram

VCC

REGULATOR

TO ALL SUBCIRCUITS

OW-PASS

ILTER

CHMITT

RIGGER

VOUT

Hall

Element

AMPLE, HOLD

ALL

ONTROL

URRENT

VERAGING

IMIT

GND

APS13295-DS, Rev. 1

MCO-0000386

May 10, 2018

Precision Hall-Effect Switch

for Consumer and Industrial Applications

APS13295

SELECTION GUIDE

Switchpoints

Ambient Temperature,

(Typ.)

Part Number

Packing^[1]

Mounting

Branding

T_A

B_OP

B_RP

APS13295KLHALX

APS13295KLHALT^[2]7-in. reel, 3000 pieces/reel

APS13295KUAA Bulk, 500 pieces/bag

13-in. reel, 10000 pieces/reel

3-pin SOT23W surface mount

3-pin SIP through hole

A33

A34

–40°C to 125°C

35 G

25 G

^[1]Contact Allegro for additional packing options.

^[2]Available through authorized Allegro distributors only.

RoHS

COMPLIANT

ꢀ_SUPPLꢁ

R_PULL-UP

ꢆ

1 ꢉΩ

APS13295

ꢄ

ꢀCC

ꢀꢂUꢃ

ꢀ_ꢂUꢃ

C_ꢅꢁP

ꢆ

ꢊNꢋ

0.1 ꢇꢈ

Figure 1: Typical Application Circuit

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

Precision Hall-Effect Switch

for Consumer and Industrial Applications

APS13295

ABSOLUTE MAXIMUM RATINGS

Characteristic

Forward Supply Voltage ^[1]

Reverse Supply Voltage ^[1]

Output Off Voltage ^[1]

Symbol

Notes

Rating

Units

V_CC

V_RCC

V_OUT

I_OUT

I_ROUT

–18

Output Current ^[2]

–

Reverse Output Current

Magnetic Flux Density ^[3]

–50

Unlimited

165

°C

Maximum Junction Temperature

Storage Temperature

ESD Voltage

T_J(max)

For 500 hours

175

T_stg

–65 to 170

±12

V_ESD(HBM)

V_ESD(CDM)

Human Body Model according to AEC-Q100-002

Charged Device Model according to AEC-Q100-011

±1

^[1]This rating does not apply to extremely short voltage transients such as load dump and/or ESD. Those events have individual ratings,

specific to the respective transient voltage event.

^[2]Through short-circuit current limiting device.

^[3]Guaranteed by design.

PINOUT DIAGRAMS AND TERMINAL LIST

Terminal List

Number

Name

Description

VCC

VOUT

GND

Connects power supply to chip

Output from circuit

Ground

3-pin SIP

(suffix UA)

3-pin SOT23W

(suffix LH)

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

Precision Hall-Effect Switch

for Consumer and Industrial Applications

APS13295

ELECTRICAL CHARACTERISTICS: Valid over full operating voltage, ambient temperature range T_A= –40°C to 125°C,

and with C_BYP= 0.1 µF, unless otherwise specified

Characteristics

ELECTRICAL CHARACTERISTICS

Forward Supply Voltage

Supply Current

Symbol

Test Conditions

Min.

Typ.^[1]

Max.

Unit^[2]

V_CC

I_CC

Operating, T_J< 175°C

2.8

–

µA

Output Leakage Current

Output Saturation Voltage

Output Off Voltage

I_OUTOFF

V_OUTOFF= 24 V, B < B_RP

–

500

V_OUT(SAT)I_OUT= 20 mA, B > B_OP

V_OUTOFFB < B_RP

–

200

–

V_CC≥ V_CC(min), B < B_RP(min) – 10 G,

B > B_OP(max) + 10 G

Power-On Time ^[3]

t_ON

–

µs

Power-On State, Output^[3]

Chopping Frequency

Output Rise Time^[4]

Output Fall Time^[4]

POS

V_CC≥ V_CC(min), t < t_ON

Low

800

0.2

–

f_C

t_r

–

kHz

µs

R_PULL-UP= 1 kΩ, C_L= 20 pF

t_f

0.1

µs

TRANSIENT PROTECTION CHARACTERISTICS

Output Short-Circuit Current Limit

Output Zener Clamp Voltage

Reverse Battery Current

Supply Zener Clamp Voltage

MAGNETIC CHARACTERISTICS

Operate Point

I_OM

V_Zoutput

I_RCC

–

I_OUTOFF= 3 mA; T_A= 25°C, Output Off

V_RCC= –18 V, T_A= 25°C

–5

–

V_Z

I_CC= I_CC(max) + 3 mA, T_A= 25°C

B_OP

B_RP

–

Release Point

Hysteresis

B_HYS

(B_OP– B_RP

)

^[1]Typical data are at T_A= 25°C and V_CC= 12 V.

^[2]1 G (gauss) = 0.1 mT (millitesla).

^[3]Guaranteed by device design and characterization.

^[4]C_L= oscilloscope probe capacitance.

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

Precision Hall-Effect Switch

for Consumer and Industrial Applications

APS13295

THERMAL CHARACTERISTICS: May require derating at maximum conditions; see application information

Characteristic

Symbol

Test Conditions

Value Units

Package LH, 1-layer PCB with copper limited to solder pads

228

110

165

°C/W

Package LH, 2-layer PCB with 0.463 in. of copper area each side

Package Thermal Resistance

R_θJA

connected by thermal vias

Package UA, 1-layer PCB with copper limited to solder pads

Power Derating Curve

T_J(max)= 175°C; I_CC= I_CC(max),I_OUT= 0 mA (Output Off)

V_CC(max)

Package LH, 2-layer PCB

(R_θJA= 110 °C/W)

Package UA, 1-layer PCB

(R_θJA= 165 °C/W)

Package LH, 1-layer PCB

(R_θJA= 228 °C/W)

V_CC(min)

85 105 125 145 165 185

T_J(max)

Temperature (°C)

Power Dissipation versus Ambient Temperature

1900

1800

1700

1600

1500

1400

1300

1200

1100

1000

900

Package LH, 2-layer PCB

(R_θJA= 110°C/W)

Package UA, 1-layer PCB

(R_θJA= 165°C/W)

800

700

600

500

400

300

200

100

Package LH, 1-layer PCB

(R_θJA= 228°C/W)

105 125 145 165 185

Temperature (°C)

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

Precision Hall-Effect Switch

for Consumer and Industrial Applications

APS13295

CHARACTERISTIC PERFORMANCE DATA

Average Supply Current versus Supply Voltage

Average Supply Current versus Ambient Temperature

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0.0

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0.0

T_A(°C)

-40

V_CC(V)

2.8

125

-60

-40

-20

100

120

140

V_CC(V)

T_A(°C)

Average Low Output Voltage versus Supply Voltage for I_OUT= 20 mA

Average Low Output Voltage versus Ambient Temperature for I_OUT= 20 mA

500

450

400

350

300

250

200

150

100

450

400

350

300

250

200

150

100

T_A(°C)

-40

V_CC(V)

2.8

125

-60

-40

-20

100

120

140

V_CC(V)

T_A(°C)

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

Precision Hall-Effect Switch

for Consumer and Industrial Applications

APS13295

CHARACTERISTIC PERFORMANCE DATA (continued)

Average Operate Point versus Ambient Temperature

Average Operate Point versus Supply Voltage

T_A(°C)

-40

V_CC(V)

2.8

125

-60

-40

-20

100

120

140

V_CC(V)

T_A(°C)

Average Release Point versus Ambient Temperature

Average Release Point versus Supply Voltage

T_A(°C)

-40

V_CC(V)

2.8

125

-60

-40

-20

100

120

140

V_CC(V)

T_A(°C)

Average Switchpoint Hysteresis versus Supply Voltage

Average Switchpoint Hysteresis versus Ambient Temperature

V_CC(V)

2.8

T_A(°C)

-40

125

-60

-40

-20

100

120

140

T_A(°C)

V_CC(V)

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

Precision Hall-Effect Switch

for Consumer and Industrial Applications

APS13295

FUNCTIONAL DESCRIPTION

OPERATION

POWER-ON BEHAVIOR

The output of the APS13295 switches low (turns on) when a

south-polarity magnetic field perpendicular to the Hall element

exceeds the operate point threshold, B_OP(see Figure 2). After

turn-on, the output voltage is V_OUT(SAT). The output transistor is

Device power-on occurs once t_ONhas elapsed. During the

time prior to t_ON, and after V_CC≥ V_CC(min), the output state is

V_OUT(SAT). After t_ONhas elapsed, the output will correspond with

the applied magnetic field for B > B_OPor B < B_RP. See Figure 3

capable of continuously sinking up to 30 mA. When the magnetic for an example.

field is reduced below the release point, B_RP, the device output

Powering-on the device in the hysteresis range (less than B_OPand

higher than B_RP) will give an output state of V_OUTOFF. The cor-

goes high (turns off) to V_OUTOFF

rect state is attained after the first excursion beyond B_OPor B_RP

V+

V_OUTOFF

Key

POS

B>B_OP

B<B_RP,B_RP<B<B_OP

V_OUT(OFF)

Output State

Undefined for

V_OUT(SAT)

POS

V_CC<V_CC(min)

V_OUT(SAT)

B+

(south)

B_HYS

V_CC(min)

Figure 2: Device Switching Behavior

On the horizontal axis, the B+ direction indicates increasing

south polarity magnetic field strength.

t_ON

The difference in the magnetic operate and release points is the

hysteresis, B_HYS,of the device. This built-in hysteresis allows

clean switching of the output even in the presence of external

mechanical vibration and electrical noise.

Figure 3: Power-On Sequence and Timing

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

Precision Hall-Effect Switch

for Consumer and Industrial Applications

APS13295

Applications

ꢀ_PULL-UP

ꢀ_SUPPLꢁ

It is strongly recommended that an external bypass capacitor be

connected (in close proximity to the Hall element) between the

supply and ground of the device to guarantee correct performance

under harsh environmental conditions and to reduce noise from

internal circuitry. As is shown in Figure 1: Typical Application

Circuit, a 0.1 µF capacitor is required. In applications where max-

imum robustness is required, additional measures may be taken.

In Figure 4: Enhanced Protection Circuit, a resistor in series with

the VCC pin and a capacitor on the VOUT pin enhance the EMC

immunity of the device. It is up to the user to fully qualify the

Allegro sensor IC in their end system to ensure they achieve their

system requirements.

R_PULL-UP

1 ꢉΩ

ꢆ

R_Sꢆ

100 Ω

APS13295

ꢀ_ꢂUꢃ

ꢄ

ꢀCC

ꢀꢂUꢃ

ꢌNꢍ

C_ꢅꢁP

0.1 ꢇꢈ

ꢆ

C_ꢂUꢃ

ꢆ

ꢊ.ꢋ nꢈ

R_Sand C_ꢂUꢃare recommended ꢎor maꢏimꢐm

roꢑꢐstness in an aꢐtomotiꢒe enꢒironment.

These devices are sensitive in the direction perpendicular to the

branded package face, and may be configured to sense magnetic

fields in a variety of orientations, such as the ones shown in

Figure 5.

Figure 4: Enhanced Protection Circuit

Extensive applications information for Hall-effect devices is

available in:

• Hall-Effect IC Applications Guide, AN27701,

• Hall-Effect Devices: Guidelines for Designing Subassemblies

Using Hall-Effect Devices AN27703.1

• Soldering Methods for Allegro’s Products – SMD and

Through-Hole, AN26009

All are provided on the Allegro website:

www.allegromicro.com

PCB

Figure 5: Sensing Conﬁgurations

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

Precision Hall-Effect Switch

for Consumer and Industrial Applications

APS13295

CHOPPER STABILIZATION

A limiting factor for switchpoint accuracy when using Hall-effect the offset causing the magnetically induced signal to recover its

technology is the small-signal voltage developed across the Hall

plate. This voltage is proportionally small relative to the offset

that can be produced at the output of the Hall sensor. This makes

it difficult to process the signal and maintain an accurate, reliable

output over the specified temperature and voltage range. Chopper

stabilization is a proven approach used to minimize Hall offset.

original spectrum at baseband while the DC offset becomes a

high-frequency signal. Then, using a low-pass filter, the signal

passes while the modulated DC offset is suppressed. Allegro’s

innovative chopper stabilization technique uses a high-frequency

clock. The high-frequency operation allows a greater sampling

rate that produces higher accuracy, reduced jitter, and faster sig-

nal processing. Additionally, filtering is more effective and results

in a lower noise analog signal at the sensor output. Devices such

as the APS13295 that use this approach have an extremely stable

quiescent Hall output voltage, are immune to thermal stress,

and have precise recoverability after temperature cycling. This

technique is made possible through the use of a BiCMOS process

which allows the use of low-offset and low-noise amplifiers

in combination with high-density logic and sample-and-hold

circuits.

The Allegro technique, dynamic quadrature offset cancellation,

removes key sources of the output drift induced by temperature

and package stress. This offset reduction technique is based on

a signal modulation-demodulation process. Figure 6: Model of

Chopper Stabilization Circuit (Dynamic Offset Cancellation)

illustrates how it is implemented.

The undesired offset signal is separated from the magnetically

induced signal in the frequency domain through modulation.

The subsequent demodulation acts as a modulation process for

Regulator

Clock/Logic

Low-Pass

Filter

Hall Element

Amp

Figure 6: Model of Chopper Stabilization Circuit

(Dynamic Oﬀset Cancellation)

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

Precision Hall-Effect Switch

for Consumer and Industrial Applications

APS13295

For example, given common conditions such as: T_A= 25°C,

POWER DERATING

The device must be operated below the maximum junction tem-

perature of the device, T_J(max). Under certain combinations of

peak conditions, reliable operation may require derating supplied

power or improving the heat dissipation properties of the appli-

cation. This section presents a procedure for correlating factors

affecting operating T_J. (Thermal data is also available on the

Allegro MicroSystems website.)

V_CC= 12 V, I_CC= 2 mA, V_OUT= 185 mV, I_OUT= 20 mA (output

on), and R_θJA= 165°C/W, then:

P_D= (V_CC× I_CC) + (V_OUT× I_OUT) =

(12 V × 2 mA) + (185 mV × 20 mA) =

24 mW + 3.7 mW = 27.7 mW

ΔT = P_D× R_θJA= 27.7 mW × 165°C/W = 4.6°C

T_J= T_A+ ΔT = 25°C + 4.6°C = 29.6°C

The Package Thermal Resistance, R_θJA, is a figure of merit sum-

marizing the ability of the application and the device to dissipate

heat from the junction (die), through all paths to the ambient air.

Its primary component is the Effective Thermal Conductivity, K,

of the printed circuit board, including adjacent devices and traces.

Radiation from the die through the device case, R_θJC, is relatively

small component of R_θJA. Ambient air temperature, T_A, and air

motion are significant external factors, damped by overmolding.

A worst-case estimate, P_D(max), represents the maximum allow-

able power level (V_CC(max), I_CC(max)), without exceeding

T_J(max), at a selected R_θJA

For example, given the conditions R_θJA= 228°C/W, T_J(max) =

175°C, V_CC(max) = 24 V, I_CC(max) = 4 mA, V_OUT= 500 mV,

and I_OUT= 25 mA (output on), the maximum allowable operating

ambient temperature can be determined.

The resulting power dissipation capability directly reflects upon

the ability of the device to withstand extreme operating condi-

tions. The junction temperature mission profile specified in the

Absolute Maximum Ratings table designates a total operating life

capability based on qualification for the most extreme conditions,

where T_Jmay reach 175°C.

The power dissipation required for the output is shown below:

P_D(V_OUT) = V_OUT× I_OUT= 500 mV × 25 mA = 12.5 mW

The power dissipation required for the IC supply is shown below:

P_D(V_CC) = V_CC× I_CC= 24 V × 4 mA = 96 mW

The silicon IC is heated internally when current is flowing into

the VCC terminal. When the output is on, current sinking into the

VOUT terminal generates additional heat. This may increase the

junction temperature, T_J, above the surrounding ambient tempera-

ture. The APS13295 is permitted to operate up to T_J= 175°C. As

mentioned above, an operating device will increase T_Jaccording

to equations 1, 2, and 3 below. This allows an estimation of the

maximum ambient operating temperature.

Next, by inverting using equation 2:

ΔT = P_D× R_θJA= [P_D(V_OUT) + P_D(V_CC)] × 228°C/W =

(12.5 mW + 96 mW) × 228°C/W =

108.5 mW × 228°C/W = 24.7°C

Finally, by inverting equation 3 with respect to voltage:

T_A(est) = T_J(max) – ΔT = 175°C – 24.7°C = 150.3°C

In the above case, there is sufficient power dissipation capability

to operate up to T_A(est).The example indicates that T_A(max) can

be as high as 150.3°C without exceeding T_J(max). However, the

T_A(max) rating of the device is 125°C; the APS13295 perfor-

mance is not guaranteed above T_A= 125°C.

P_D= V_IN

(1)

(2)

(3)

ꢀ

ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀΔT = P_D

θJA

T_J= T_A+ ΔT

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

Precision Hall-Effect Switch

for Consumer and Industrial Applications

APS13295

Package LH, 3-Pin (SOT-23W)

+0.12

–0.08

2.98

1.49

4°±4°

+0.020

0.180

–0.053

0.96

+0.10

2.90

+0.19

–0.06

2.40

1.91

–0.20

0.70

0.25 MIN

1.00

0.55 REF

0.25 BSC

0.95

Seating Plane

Gauge Plane

PCB Layout Reference View

Branded Face

8X 10° REF

Standard Branding Reference View

1.00 ±0.13

+0.10

A33

0.05

–0.05

0.95 BSC

0.40 ±0.10

For Reference Only; not for tooling use (reference dwg. 802840)

Dimensions in millimeters

Dimensions exclusive of mold flash, gate burrs, and dambar protrusions

Exact case and lead configuration at supplier discretion within limits shown

Active Area Depth, 0.28 mm REF

Reference land pattern layout

All pads a minimum of 0.20 mm from all adjacent pads; adjust as necessary

to meet application process requirements and PCB layout tolerances

Branding scale and appearance at supplier discretion

Hall element, not to scale

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

Precision Hall-Effect Switch

for Consumer and Industrial Applications

APS13295

Package UA, 3-Pin SIP

For Reference Only – Not for Tooling Use

(Reference DWG-0000406, Rev. 1)

NOT TO SCALE

Dimensions in millimeters

Dimensions exclusive of mold ﬂash, gate burrs, and dambar protrusions

Exact case and lead conﬁguration at supplier discretion within limits shown

+0.08

–0.05

4.09

45°

2.04

1.52 ±0.05

10°

1.44

Mold Ejector

Pin Indent

+0.08

3.02

–0.05

45°

Branded

Face

Standard Branding Reference View

0.51 REF

0.79 REF

1.02

MAX

A34

14.99 ±0.25

+0.03

–0.06

0.41

+0.05

–0.07

0.43

Dambar removal protrusion (6×)

Gate and tie bar burr area

Active Area Depth, 0.50 mm ±0.08

Branding scale and appearance at supplier discretion

Hall element, not to scale

1.27 NOM

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

Precision Hall-Effect Switch

for Consumer and Industrial Applications

APS13295

Revision History

Number

Date

Description

–

February 26, 2018

May 10, 2018

Initial release

Corrected part numbers in selection guide (page 2); renamed R_LOADto R_PULL-UP(page 2, 4, 9).

Allegro MicroSystems, LLC reserves the right to make, from time to time, such departures from the detail specifications as may be required to

permit improvements in the performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that

the information being relied upon is current.

Allegro’s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of

Allegro’s product can reasonably be expected to cause bodily harm.

The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, LLC assumes no responsibility for its

use; nor for any infringement of patents or other rights of third parties which may result from its use.

Copies of this document are considered uncontrolled documents.

For the latest version of this document, visit our website:

www.allegromicro.com

Allegro MicroSystems, LLC

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A.

www.allegromicro.com

APS13295 [ALLEGRO]

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