TLE4943C [INFINEON]
Infineon´s XENSIVTM TLE4943C is an integrated, active magnetic field sensor for wheel speed applications based on Hall technology. Its basic function is to measure the speed of a pole wheel or a ferromagnetic toothed wheel. It has a two wire-current interface using the AK protocol for communication.This protocol provides beside the speed signal additional information as direction of wheel rotation and air gap information. The sensor combines a fast power-up time with a low cut-off frequency. Excellent sensitivity and accuracy combined with its wide operational temperature range makes the sensor ideally suited for harsh automotive requirements. The TLE4943C is additionally provided with an overmolded 1.8nF capacitor for improved EMC performance.;
| 型号： | TLE4943C |
| 厂家： | 
Infineon |
| 描述： | Infineon´s XENSIVTM TLE4943C is an integrated, active magnetic field sensor for wheel speed applications based on Hall technology. Its basic function is to measure the speed of a pole wheel or a ferromagnetic toothed wheel. It has a two wire-current interface using the AK protocol for communication.This protocol provides beside the speed signal additional information as direction of wheel rotation and air gap information. The sensor combines a fast power-up time with a low cut-off frequency. Excellent sensitivity and accuracy combined with its wide operational temperature range makes the sensor ideally suited for harsh automotive requirements. The TLE4943C is additionally provided with an overmolded 1.8nF capacitor for improved EMC performance. |
| 文件： | 总48页 (文件大小：1570K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Differential Speed Sensor with AK Protocol
TLE4943C
Data Sheet
V 1.2, July 2018
Edition July 2018
Published by
Infineon Technologies AG
81726 München, Germany
© 2007 Infineon Technologies AG
All Rights Reserved.
Legal Disclaimer
The information given in this document shall in no event be regarded as a guarantee of conditions or
characteristics. With respect to any examples or hints given herein, any typical values stated herein and/or any
information regarding the application of the device, Infineon Technologies hereby disclaims any and all warranties
and liabilities of any kind, including without limitation, warranties of non-infringement of intellectual property rights
of any third party.
Information
For further information on technology, delivery terms and conditions and prices, please contact the nearest
Infineon Technologies Office (www.infineon.com).
Warnings
Due to technical requirements, components may contain dangerous substances. For information on the types in
question, please contact the nearest Infineon Technologies Office.
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approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure
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be endangered.
TLE4943C
33
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Data Sheet
3
V 1.2, July 2018
TLE4943C
1
1.1
1.2
Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.7.1
2.7.2
2.7.3
2.7.4
2.7.5
2.7.6
2.8
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Pin Configuration and Sensitive Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Marking and Data Matrix Code Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Functional Block Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Typical Application Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Protocol Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Definition of Rotation Direction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Manchester Encoding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Protocol at Normal Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Protocol for High Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Data Protocol for Standstill . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Bit Stump Suppression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Operating Modes and States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Uncalibrated and Calibrated Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Under Voltage and Start-up Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
2.8.1
2.9
3
Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Test Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
ESD Robustness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Operating Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Magnetic Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Degradation of Direction Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Change of Direction of Encoder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Watchdog Reset after Offset Jump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
3.1
3.2
3.2.1
3.3
3.4
3.5
3.6
3.7
3.8
4
Electro Magnetic Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
5
Package Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Lead Pull Out Force . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Glass Transition Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Packing and Package Dimensions of PG-SSO2-53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Packing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
5.1
5.2
5.3
5.4
Data Sheet
4
V 1.2, July 2018
Hall Based Differential Wheel Speed Sensor with AK
Protocol
TLE4943C
1
Product Description
1.1
Overview
The TLE4943C is an integrated, active magnetic field sensor for wheel
speed applications based on Hall technology. Its basic function is to
measure the speed of a pole wheel or a ferromagnetic toothed wheel. It
has a two wire-current interface using the AK protocol for communication.
This protocol provides beside the speed signal additional information as
direction of wheel rotation and air gap information. The sensor combines
a fast power-up time with a low cut-off frequency. Excellent sensitivity and
accuracy combined with its wide operational temperature range makes
the sensor ideally suited for harsh automotive requirements. The TLE4943C is additionally provided with an
overmolded 1.8nF capacitor for improved EMC performance.
1.2
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
Two wire current interface according AK protocol
Hall based principle
Integrated magnetic field sensor for wheel speed measurement
Detection of rotation direction
Additional airgap information
Single chip solution
High sensitivity
Large operating air-gaps
Magnetic pre-induction possible
Automotive qualified temperature ranges from TJ= -40°C to 150°C
1.8nF overmolded capacitor
Wide operating range from 6.5V to 20V
Green package with lead-free plating
Product Name
Product Type
Ordering Code
Package
TLE4943C
TLE4943C
SP001963054
PG-SSO-2-53
Data Sheet
5
V 1.2, July 2018
TLE4943C
2
Functional Description
2.1
General
The basic operation of the TLE4943C is to measure the differential magnetic field of ferromagnetic or permanent
magnet target wheels and generate an output signal which represents the motion of these objects. Additionally
the direction of rotation of a rotating target wheel and the quality (strength) of the magnetic signal are detected.
For the applications with ferromagnetic toothed wheels a back bias magnet is required. The magnetic
measurement is based on three equally spaced Hall elements, integrated on the IC. The two outer Hall elements
have a distance of 2.5mm, the third Hall element is placed in the middle between the outer Hall elements. The
outer Hall elements generate a differential signal which corresponds to the speed of the detected object. All three
Hall elements are used for the information of direction detection. The IC has a three-level current interface which
corresponds to the AK-protocol described below in this data sheet.
Magnetic offsets of up to +/-30mT are cancelled by a self-calibration algorithm. Only a few magnetic edges after
start-up (uncalibrated mode) are necessary to finish the self-calibration and providing offset corrected signals in
calibrated mode. Independent of the mode every increment of the encoder triggers a signal output. The output
signal frequency represents the increment frequency, e.g. 100 increments per second are equal to 100Hz. The
frequency of the magnetic signal is half of the output signal frequency.
Increment n+2
Increment
n
Increment n+1
dB
Zero
Crossing
t
T
IH
Sensor output
current I
s
IM
IL
Figure 1
Definition of increment
Data Sheet
6
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TLE4943C
2.2
Pin Configuration and Sensitive Area
Figure 2
Pin configuration and sensitive area (view on frontside marking of component)
Data Sheet
7
V 1.2, July 2018
TLE4943C
2.3
Marking and Data Matrix Code Description
GND
VDD
VDD
GND
G:
YY:
WW:
green package
production year
production week
123456:
43CA Æ TLE4943C
Figure 3
Marking of PG-SSO-2-53
Data Sheet
8
V 1.2, July 2018
TLE4943C
2.4
Block Diagram
Speed Signal dB = B2 – B1
Direction Signal dB = B3 – ( B1+B2 )/2
dir
B2 (right)
B3 (center)
B1 (left)
speed signal path
Main
Σ
-
dB
LPF
D-Core
Tracking
ADC
Tracking-ADC
Algorithm
Peak Detection
and
Offset Calculation
Offset-
DAC
dBdir
Direction
Detection
Direction
ADC
Σ
3 current
modulator
LPF
AK Protocol:
- Peak value
- timing
direction signal path
Figure 4
Block Diagram
2.5
Functional Block Description
TLE4943C is composed of the following main blocks:
•
•
•
•
•
•
•
•
•
•
Hall elements (B1, B2, B3)
Analog to Digital Converter in the speed signal path (ADC)
Offset Digital to Analog Converter (Offset DAC)
Low Pass Filter (LPF)
Three Current modulator
Main Comparator (Main)
Analog to Digital Converter in the direction path (Direction ADC)
Digital Core (D-core)
Amplifier for speed and direction path
Current modulator
The speed signal dB, calculated out of B2-B1, is amplified and low pass filtered. Afterwards signal is digitized.
Algorithms in the D-Core for peak detection and offset calculation are executed. The offset is calculated out of two
detected extrema (max+min)/2. This offset is fed back into speed signal path with an Digital to Analog converter
to correct any offsets. The main comparator compares the speed signal with zero value. During uncalibrated
mode, output of speed pulse is triggered in the D-Core by exceeding a certain threshold (2 x dBlimit).
The direction signal is calculated out of all three Hall elements (described in Figure 4). The direction signal is
amplified, filtered and digitized. In the D-Core the direction is determined and the data protocol is issued and
converted into a current modulated signal. The protocol consists of the speed pulse, issued by zero crossing, and
other data bits determined by the D-Core.
Data Sheet
9
V 1.2, July 2018
TLE4943C
2.6
Typical Application Circuit
The circuit below shows the recommended application circuit with reverse bias and overvoltage protection.
D1
R1
TLE4943C
VS
VDD
GND
D2
C1
Components
D1: 1N4007
Uout
RM
D2:
C1:
R1:
RM:
Z-Diode, 22V
10µF, 35V
10Ω
50Ω
Figure 5
Application circuit
Data Sheet
10
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TLE4943C
2.7
Protocol Description
The protocol consists of a pre-bit, a speed pulse and a nine data information bits (data protocol). The data protocol
is Manchester-coded. This means the value of a bit is coded in a rise- or a fall of the signal between the mid-current
value (Imid) and low-current (Ilow) in a certain time window. “0” is represented by a mid-low transition and “1” is
coded by a low-mid transition. Unused bits are output as default values.
I
Ihigh
Imid
Ilow
t
Figure 6
Table 1
Coding of data bits.
Coding of Additional Information
Bit # Meaning
Name
Value after power
up / under voltage
Condition
0
1
LR
0
“1” if dB<dBLR (1=error)
Error bit,
Airgap reserve
SLM
1
Validity of
signal
0=measurement of LM0, LM1, LM2 is valid;
1=invalid
amplitude
measurement
2
3
0
0
not assigned
Direction
validity
GDR
DR
“1” = valid, “0” = invalid
“0” =direction positive
4
Direction of
rotating
0
information
Data Sheet
11
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TLE4943C
Table 1
Coding of Additional Information (cont’d)
Bit # Meaning
Name
Value after power
up / under voltage
Condition
5
6
7
8
Air gap gauge
LM0
0
0
0
LSB of airgap gauge
LM1
LM2
P
MSB of airgap gauge
Parity
to be currently
calculated
Always set to get even parity (inclusive Parity bit
itself)
Data Sheet
12
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TLE4943C
2.7.1
Definition of Rotation Direction
The direction of rotation is positive if the direction of rotation and the positive Y – axis of the sensor head are
pointing in the same direction. This is shown in Figure 7. The coordinate system must be regarded as fixed in the
sensor head. This must be taken into consideration with assembly variations. In the left representation, frontside
of the sensor (=marking) points to multipole ring (=encoder) located behind. For positive direction of rotation the
direction of rotation bit (DR) is set to "0".
Figure 7
Definition of rotation direction, Sensor Marking (=Frontside) points to encoder
Positive Magnetic Field
N
S
Back
GND VDD
Positive Movement direction
of target wheel
Figure 8
Definition of rotation for back bias application, Sensor Marking (=Frontside) points to encoder
For better understanding three different modes have to be considered: data protocol at normal speed, at high
speed and standstill. Explanations will follow on next pages.
Data Sheet
13
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TLE4943C
2.7.2
Manchester Encoding
The data protocol is Manchester-coded. This means the value of a bit is coded in a rising- or a falling of the signal
between the middle-current value (Imid) and low-current (Ilow) in a certain time window. A transition from low to
middle corresponds to "1", a transition from middle to low corresponds to "0". Falling and rising edge of sensor
output current starts in the middle of data protocol (=tp/2), see bottom of example in Figure 9.
cr
zero ossing
Speed pulse
Data protocol
3*tp/2
tp
tp
tp
tp
tp
tp
tp
tp
tp
tp
tp/2
Sensor output current
bit 0
bit1
bit2
bit3
bit4
bit5
bit6
bit7
Parity
Is
tp/2
tp
Figure 9
Manchester Encoding
Data Sheet
14
V 1.2, July 2018
TLE4943C
2.7.3
Protocol at Normal Speed
At normal speed (signal frequencies less than 1800Hz) all data bits are transmitted. At the beginning the initial bit
(Ilow) is sent for tp/2. Then the speed pulse with duration tp is issued which is followed by a current level Ilow for tp/2.
After that the data protocol is sent.
Zero crossing
Ihigh
bit0
bit1
bit2
bit3
bit4
bit5
bit6
bit7 Parity
bit0
bit1
bit2
bit3
bit4
bit5
bit6
bit7 Parity
Imid
Ilow
3*tp/2
tp
tp
tp
tp
tp
tp
tp
tp
tp
tp
tp
tp
3*tp/2
tp
tp/2
tp/2
Bit is
completely
transmitted
Figure 10 Protocol at normal speed
Data Sheet
15
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TLE4943C
2.7.4
Protocol for High Speed
For higher speeds the data protocol is shortened (last bits are cut off). The table below shows how many bits are
transmitted at different signal frequencies. The serial data protocol is shortened at high speeds, because the time
to the next speed pulse is shorter than the protocol cycle. The data bits at the end are therefore "cut off". In each
speed range, the maximum possible number of bits of additional information are transferred.
The output of partially transmitted bits called “bit stumps” are suppressed. See also Chapter 2.7.6. The shortening
of the protocol does not result in any "bit stumps" (bits which have not been completely transferred). This means
that the bits affected by the shortening in any case will be transmitted completely, means, a bit which has been
started must also be transferred to the end. Instead of the bits affected by the shortening, the current level Ilow must
be output. The suppression of bit stumps does function reliably in all speed ranges and in all regular operating
states of the sensor, i.e. also in the standstill protocol. This ensures that no compatibility problems occur in any
regular operating cases caused by e.g. EMC.
Table 2
Transmitted bits at electric signal frequency
Electric Signal frequency1)
< 1818Hz (1800Hz)
< 2000 Hz (2000Hz)
< 2222 Hz (2200Hz)
< 2500 Hz (2400Hz)
< 2857 Hz (2800Hz)
< 3333 Hz (3200Hz)
< 4000 Hz (4000Hz)
< 5000 Hz (5000Hz)
Typical Number of data bits transmitted
9 (bit0 - bit8)
8 (bit0 - bit7)
7 (bit0 - bit6)
6 (bit0 - bit5)
5 (bit0 - bit4)
4 (bit0 - bit3)
3 (bit0 - bit2)
2 (bit0 - bit1)
1) Note: electric signal frequency is equal to two times of magnetic frequency
Note: Frequencies in brackets are according AK specification
Data Sheet
16
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TLE4943C
2.7.5
Data Protocol for Standstill
If for a longer time than tstop no increment is recognized, the IC starts to send the standstill-protocol. This protocols
is sent every 150ms +/- 20%. In this protocol the current value of the speed-pulse is set to Imid and all the other
bits are transmitted like described before. For very slow wheel speeds more than one standstill protocol can be
issued between consecutive speed pulses.
dB
Increment n+2
Increment
n
Increment n+1
Incremental
protocol
Data Burst:
on Zero Crossing
250 ms
500 ms
Iout
28mA
Incremental
protocol
Standstill Protocol
Data Burst:
150ms after
550µs Data Bursts
Increment Protocol
Data Burst
Standstill
Protocol
14mA
7mA
time
150ms
150ms
150ms
Figure 11 Standstill protocol
Data Sheet
17
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TLE4943C
Zero Crossing
tstop
Speed pulse
Data protocol
tp
tp
tp
tp
tp
tp
tp
tp
tp
tp
tp/2
tp/2
bit0
bit1
bit2
bit3
bit4
bit5
bit6
bit7
Parity
Sensor output
current I
s
Speed replacement
pulse
Initial bit
Initial bit
Figure 12 Protocol at standstill
Note on the standstill - travel transition:
If an increment of the magnetic encoder is detected, the standstill protocol will be aborted. The speed pulse Ihigh
with the initiating initial bit (with the level Ilow) has precedence. Due to the suppression of "bit stumps" also required
in the standstill protocol, the cutting of the protocol can actually only take place between two data bits, and not
during an ongoing bit transmission. The initial bit enables the speed pulse to always be preceded by a current level
Ilow for a duration of at least tp/2. This is helpful for the detection of the speed pulse in the ECU (electronic control
unit).
Data Sheet
18
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TLE4943C
dB
Increment
out
1) Last started bit of standstill protocol will be tranmitted completely
2) Delay of 25us at llow
3) Speed pulse issued
28mA
Standstill protocol due to
no edge within last150 ms
14mA
7mA
50us tp/2=25 µs
Figure 13 Starting wheel movement during standstill protocol using bit stump suppression
Handling of “Direction Validity” and “Direction” at the standstill protocol:
At any standstill DR is transmitted as zero (default value) and GDR is transmitted as invalid (=0). With the first 5
standstill protocols in a row, the direction algorithm is reset. Therefore at following next three zero crossings
(speed pulses) direction detection and change of direction detection takes place (GDR=invalid, DR=default) and
GDR is valid and correspondig direction is output at third speed pulse after standstill.
Handling of “Validity of signal amplitude measurement” within standstill protocol:
Validity (SLM) of signal measurement is transmitted as 1 (invalid) and signal amplitude (Level in relation to LR) is
transmitted as 0 during standstill protocol. With the first 5 standstill protocols in a row, the SLM/LM is reset to
invalid. SLM remains invalid until two new extrema in dB are found. Depending on the amplitude of dB and phase
of the standstill protocol, SLM is valid with the second, third or fourth speed protocol after every 5th standstill
protocol.
Handling of Error Bit “Air Gap Reserve” (=LR bit) within standstill protocol:
It is transmitted as "0" (no error) in the standstill protocol.
It is reset to 0 with the first 5 standstill protocols in a row. The standstill protocol LR remains “0” (no error) until two
new extrema in dB are found.
.
The initial bit enables the speed pulse to always be preceded by a current level Ilow for a duration of at least tp/2.
This is helpful for the detection of the speed pulse in the ECU.
Data Sheet
19
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TLE4943C
2.7.6
Bit Stump Suppression
The suppression of bit stumps in the wheel speed sensor (WSS) is implemented and described in this paragraph.
Following principle is used to realize a bit stump suppression:
Constant time shift of output of speed pulse and data protocol:
The sensor output is always completely shifted by a bit time tp when a new protocol starts. This is equivalent to a
time output offset, which has the following effect:
The initial bit is not started immediately at the moment in which a new protocol starts, what could occur during an
ongoing data protocol at high speed. Instead, tp is always initially waited for a time offset within which the last
ongoing protocol output is monitored. For the case a bit output is still active, this will be completely transferred
without being cut off. This will effectively prevent the occurrence of bit stumps. Within this offset time tp,
suppression of the next possible data bit of the last protocol will be introduced. In this way a current bit transfer
will be completed and the transfer of any further bits (of the last protocol) will be prevented. At the end of this offset
time, the transfer of the initial bit will start. Advantage of this procedure: it is also effective in the standstill protocol,
i.e. if a new increment of the encoder is detected during an ongoing standstill protocol, a current ongoing bit
transfer are not be ended in any "bit stump". The transmission of additional bits is suppressed. After delay phase,
the new transfer begins with the initial bit tp/2, followed by speed pulse and data protocol.
The following figures show the effect of the bit stump suppression according to the method described above using
3 representative cases.
1st case: No cutting off of the preceding protocol. The time between two consecutive protocols is sufficient to
transfer all bits. Nevertheless, the new protocol begins at the moment of a new increment of the encoder with the
constant-time output offset of the length tp. This is followed by the initial bitwidth tp/2, then the speed pulse, etc.
Zero crossing
Preceding protocol
bit0
bit1
bit2
bit3
bit4
bit5
bit6
bit7 Parity
tp
tp
tp
tp
tp/2
tp/2
Subsequent
protocol
Initial bit
Time output offset
bit0
bit1
bit2
bit3
bit4
tp
tp
tp
tp
tp/2
tp/2
Figure 14 Case 1 - No cutting of the preceding protocol
Data Sheet
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TLE4943C
2nd case: The last bit of the preceding protocol is cut off.
The time between 2 consecutive protocols is no longer sufficient and a new increment of the encoder occurs, while
the last bit of the preceding protocol is still being transferred. At this moment the new protocol begins again with
the constant-time output offset of the length tp. However now it is realized in the sensor that a bit transfer is still
running. This is completely transmitted within the currently running output offset. After the output offset ends, the
initial bit follows with tp/2, then the speed pulse, etc.
Zero crossing
bit0
bit1
bit2
bit3
bit4
bit5
bit6
bit7 Parity
Preceding protocol
tp
tp
tp
tp
tp/2
tp/2
Bit is
completely
transmitted
Initial bit
bit0
bit1
tp
bit2
bit3
bit4
bit5
bit6
Subsequent
protocol
Time output offset
tp
tp
tp
tp/2
tp/2
Figure 15 Case 2 - last bit of preceding protocol is cut off
Data Sheet
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TLE4943C
3rd case: several bits of the preceding protocol are cut off
Zero crossing
Bits #7 and #8 are no
longer transmitted
bit0
bit1
bit2
bit3
bit4
bit5
bit6 bit7
Parity
Preceding protocol
tp
tp
tp
tp
tp/2
tp/2
Bits #6 is completely
transmitted
Initial bit
bit0
bit1
bit3
bit4
bit5
bit6
Parity
bit2
bit7
Subsequent
protocol
Time output offset
tp
tp
tp
tp
tp/2
tp/2
Figure 16 Case 3 - several bits of the preceding protocol are cut off
A new increment of the encoder occurs while, for example, bit #6 of the preceding protocol is still being transferred.
At this moment the new protocol begins again with the constant time output offset of the length tp. It is realized in
the sensor that a bit transfer is still running. Bit #6 of the preceding protocol is completely transmitted within the
current running output time-offset. In addition, the bits #7 and #8 (parity) still missing are suppressed and no longer
transmitted. As a result, the line is clean again and following the end of the output offset the initial bit follows with
tp/2, then the speed pulse, etc.
Data Sheet
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TLE4943C
2.8
Operating Modes and States
The basic operation of the TLE4943C is to measure the differential magnetic field of a rotating target wheel and
generate an output signal which represents the wheel speed and provides information about rotation direction and
signal quality. The IC has a three level current interface. The functionality of the TLE4943C can be distinguished
in two different phases: uncalibrated and calibrated mode.
2.8.1
Uncalibrated and Calibrated Mode
After an initial calibration delay time td_input, the differential magnetic signal dB is tracked by an analog to digital
converter (ADC) and monitored within the digital circuit. For detection the signal needs to exceed the internal
threshold DNC (digital noise constant). When the signal slope is identified as a falling (or rising) edge and the
signal change exceeds the DNC, the first extrema is located and first output pulse is triggered. The digital noise
constant value is changed accordingly to magnetic field amplitude, leading to a change in phase shift between
magnetic input signal and output signal. This value of the digital noise constant is determined by the signal
amplitude. First DNC (=2 x dBlimit), indicated as arrows in figure below. A second output is triggered when the
signal change exceeds again the value of the new DNC (calulated by (min1 + max 1)/2)in the following rising
(respectively falling) edge. When a maximum and minimum was found an offset correction will take place. This
leads to a phase shift of output signal and the sensor enters the calibrated mode. In calibrated mode switching is
triggered by the zero crossing of the differential magnetic signal. The min/max detection is reduced to 1/4 of peak-
peak. In calibrated mode minimal DNC is 2 x dBlimit .Out of this consecutive speed pulses have a nominal delay of
about 180°.
Handling of additional information bits in uncalibrated and calibrated mode:
Signal amplitude measurement: SLM is valid if two valid extrema are found (the first extrema after power on is
invalid). Latest with fourth protocol SLM is valid.
Startup at high frequencies could lead to shortened protocol. The bit suppression according Chapter “Bit Stump
Suppression” is executed.
Data Sheet
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TLE4943C
dB
max1
2 x dBlimit
(min1+max1)/2
Offset
correction
min1
(min2+max1)/2
min2
Phase Shift Change
Uncalibrated Mode
Calibrated Mode
Figure 17 Example for startup behavior and change form uncalibrated into calibrated mode
Data Sheet
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TLE4943C
dB
max1
2 x dBlimit
(min1+max1)/2
Offset
correction
min1
(min2+max1)/2
min2
Phase Shift Change
Uncalibrated Mode
Calibrated Mode
dBdir = center – (left + right) / 2
max1
dBdir
dB_dirmin
Direction detecion
min1
Figure 18 Output triggering in calibrated mode and direction detection
Direction detection
Direction signal is always sampled with the main comparator switching (75us +/-25%) before the sensors output
switching (speed protocol). After two consecutive samples of the direction signal, offset of them is calculated and
then the third sample is compared with the offset value. The direction is given by the sign of the third sample
direction signal and the direction of the edge (rising or falling) of the magnetic speed signal. Using this direction
detection method, detected direction is valid latest with the 4th output speed protocol. GDR bit gives the
information if the detected direction is valid. On TLE4943C the direction detection is valid if the difference between
the two consecutive samples of the direction signal (also used for the calculation of the direction) is greater than
two times dBdirmin and speed signal is four times greater than dBlimit
.
Data Sheet
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TLE4943C
2.9
Under Voltage and Start-up Behavior
The voltage supply comparator has an integrated hysteresis Vhys with the maximum value of the release level Vrel.
This determines the minimum required supply voltage VDD of the chip. A minimum hysteresis Vhys is implemented
thus avoiding a toggling of the output when the supply voltage VDD is modulated due to the additional voltage drop
at RM when switching from low to high current level at VDD = 4.5V (designed for use with RM=50Ω). As long as VDD
does not exceed Vrel sensor stays in low level (VDD>Vres).
Speed pulse
Data bits
VDD*
Vrel
Vhys
Vres
Vhys= Vrel - Vres
*direct on pins
Figure 19 Start-up and under voltage behavior
Data Sheet
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TLE4943C
3
Specification
3.1
Test Circuit
Following test circuit is used for evaluating electrical parameters:
VDD
VS
GND
RM = 50Ω
Integratedcap on leads
Vout
Figure 20 Test circuit
ΔI
Figure 21 Definition of rise and fall time
ΔI refers to 80% positive and negative edges of Ilow to Imid and Ilow to Ihigh and vice versa. Slew rate is calculated by
division of ΔI/tr (rise time) or ΔI/tf (fall time).
Data Sheet
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TLE4943C
B[mT]
Right Hall Element
Left Hall Element
[mA]
Ihigh
Imid
Ilow
Sensor Top View
Top View
North
South
Left
(VDD
Right
(GND)
43CA
)
1
3
2
Hall
Elements
left
right
Branded Side
(front side)
Sensor head is folded
towards viewer
Definition of magnetic field
Positiv is considered when
South pole shows to back side of IC housing or when
North pole shows to front side (=branded) of IC housing
(Gaussmeter: positiv at north pole. Dot towards viewer)
Figure 22 Definition of field direction and sensor switching
Data Sheet
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TLE4943C
Increment n+2
Increment
n
Increment n+1
Zero Crossing
T
t
Sensor output
current Is
DC = t / T * 100%
Figure 23 Definition of Duty Cycle
T
speed pulse
Is
bit code
Ti
Ti+1
Ti+2
t
n
ΔT 2
∑
1
i=1
δ =
T
n −1
T= Ti + Ti+1 (mean value)
Figure 24 Definition of Jitter
Data Sheet
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TLE4943C
3.2
Absolute Maximum Ratings
Attention: Stresses above the max. values listed here may cause permanent damage to the device. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability. Maximum
ratings are absolute ratings; exceeding only one of these values may cause irreversible damage to the
integrated circuit.
TJ=-40°C to 150°C, 4.5V ≤ VDD ≤ 20V if not indicated otherwise
Table 3
Absolute Maximum Ratings
Symbol
Parameter
Values
Unit
Note / Test Condition
Min.
Typ. Max.
Supply voltage
VDD
-0.3
–
-
V
TJ<80°C
16.5
20
22
24
24
26
TJ=170°C
TJ=150°C
t=10x5min
t=2min; TJ=-40°C..60°C
t=10x5min, RM≥50Ω
t=400ms, RM≥50Ω included
in VDD
Junction temperature 1)
TJ; Either
OR
-40
110
125
150
160
170
190
°C
12500h
10000h
5000h
OR
OR
2500h
OR
500h
Additional
4h, VDD<16.5V
Reverse polarity voltage
Reverse polarity current
-16
V
RM=50Ω included in VDD
t<1h
200
300
200
mA
mA
mA
external current limitation
required, t<4h
external current limitation
required, t<1h
external current limitation
required, t<10h, T=25°C
Thermal resistance of package
Number of power on cycles
Immunity to external fields
RthJA
190
2
K/W2)
cycles
T
500.000
equivalent to 1600kA/m3);
TJ=-40..175°C
Passive lifetime1)
Processability
15
2
a
a
TJ≤50°C, U=0V
after Datecode
1) This lifetime statement is an anticipation based on an extrapolation of Infineon's qualification test results. The actual lifetime
of a component depends on its form of application and type of use etc. and may deviate from such statement. The lifetime
statement shall in no event extend the agreed warranty period.
2) Can be significantly improved by further processing like overmolding
3) Conversion: B= μ*H ( μ=4*π*10-7)
Data Sheet
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TLE4943C
3.2.1
ESD Robustness
Table 4
ESD Protection
Characterized according to Human Body Model (HBM) tests in compliance with Standard
EIA/JESD22-A114-B HBM (covers MIL STD 883D)
Parameter
Symbol
Test Result
Unit
Notes
ESD-Protection
VESD
± 12
kV
R = 1.5 kΩ,
C = 100 pF
or >8000V for TLE4943C (H3B according AEC Q100)
Note:Tested at room temperature
Data Sheet
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TLE4943C
3.3
Operating Range
All parameters specified in the following sections refer to these operating conditions unless otherwise noticed.
Table 5
Operating Range
Parameter
Symbol
Values
Unit
Note / Test Condition
Min.
Typ. Max.
Supply voltage
VDD Hysteresis
VDD
6.5
–
20
V
Directly on IC leads; does
not include voltage drop at
RM
Vres
Vhys
Vrel
4.0V 4.2
4.5
2.3
6.5
6
V
AK: reset voltage
1.6
5.8
1.8
AK: return voltage
Supply voltage modulation
Junction temperature
VAC
Vpp
VDD=13V;
0<fmod<150kHz1)
Tj
Either
OR
OR
OR
OR
Bo
-40
110
125
150
160
170
500
7.5
°C
12500h2)
10000h2)
5000h
2500h
500h
Pre induction
-500
-7.5
mT
K
Temperature change per
magnetic period for valid DR
dTj_Dir
3) valid for dBdir > 1.9mT
4)valid for dB > 3mT
Temperature change at standsill dTj_Speed
-150
-30
50
30
K
Pre induction offset between
outer probes
Bstat l/r
mT
Differential induction
dB
-120
-30
120
30
mT
mT
Pre-induction offset between
mean of outer probes and center
probe
Bstat m/o
Signal frequency
f
0
50005)
0.83
Hz
Hz
Minimum magn. frequency for
direction detection
fdir_min
0.54
0.66
1) sine wave
2) This lifetime statement is an anticipation based on an extrapolation of Infineon's qualification test results. The actual
lifetime of a component depends on its form of ap plication and type of use etc. and may deviate from such statement. The
lifetime statement shall in no event extend the agreed warranty period.
3) The permissible change of the temperature is, e.g. 7.5K per one magnetic periode. For example a magnetic signal of 10Hz
(Tmag = 0.1s) results in a max change of temperature = 7.5K / 0.1s = 75K / s. A wrong direction info may occure if dTj_Dir
is exceeded.
4) More than 2 speed protocols might be lost if the temperature change during standstill is exceeded at re-drive.
5) 5000Hz electric signal frequency are equal to 2500Hz magnetic signal frequency (one sin period has two increments).
Data Sheet
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TLE4943C
3.4
Electrical Characteristics
All values specified at constant amplitude and offset of input signal, over operating range, unless otherwise
specified. Typical values correspond to VDD=12V and TA=25°C
Table 6
Electrical Characteristics1)
Symbol
Parameter
Values
Typ.
Unit
Note / Test Condition
Min.
5.9
11.8
23.6
1.8
3.6
1
Max.
8.4
Supply current low
Ilow
Imid
Ihigh
7
mA
mA
mA
Supply current mid
14
28
2.0
4
16.8
33.6
2.6
Supply current high
Supply current ratio middle/low
Supply current ratio high/low
Supply current @ VDD >= Vres_min
Line regulation
I
mid/Ilow
high/Ilow
I
5.0
8)
8)
mA
dIx/dVDD
90
0
uA/V
Number of pulses suppressed
8)after power on and
internal reset
8)
Magnetic edges required for first
output pulse
1
4
4
4
edge
Number of pulses required for
initial offset calibration
nstart
edges 5th “pulse” is offset
corrected2)8)
8)
Number of pulses required for
initial LM measurement
3
pulses
Number of pulses required for
initial valid direction detection3)
nDR-start
pulses 4th pulse has valid
direction information,
dBdir>=2*dBdirmin
4)8)
7
pulses 7th pulse has valid
direction info
2*dBdirmin>dBdir>=dBdirmin
4)8)
Valid direction after change of
direction5)
3
6
pulses 3rd pulse has valid
direction information,
4)8)
dBdir>=2*dBdirmin
pulses 6th pulse has valid
direction info
2*dBdirmin>dBdir>1.8*dBdirmin
4)8)
7
pulses 7th pulse has valid
direction info
1.8*dBdirmin>dBdir>dBdirmin
4)8)
Frequency limit for direction
information availability
fdir-limit
27006)8)
Hz
due to bit stump
suppression
Power up time
1
ms
us
%
time for stable current8)
additive to power up time8)
dB >=2mT sine wave
Initial calibration delay time
Duty cycle in calibrated mode
td,input
DCcal
220
50
300
60
40
Data Sheet
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TLE4943C
Table 6
Electrical Characteristics1) (cont’d)
Parameter
Symbol
Values
Typ.
Unit
Note / Test Condition
Min.
20
Max.
80
Duty cycle in uncalibrated mode DCuncal
%
%
dB >=2mT sine wave8)
Jitter, 1Hz < f < 5000Hz
Jitter, 1Hz < f < 5000Hz
Jitter for speed pulse
Sjit-close
,
±2
dB >=2mT; 1sigma
value7)8)
Tj≤150°C
Sjit-close,
Tj≤170°C
Sjit-far,
Tj≤150°C
Sjit-far,
Tj≤170°C
±3
%
%
%
us
±4
2mT > dB >dBlimit ; 1sigma
value8)
±6
0
+0.7
rising edge of speed pulse
relative to magnetic edge
change8)
Jitter @ board net ripple
f<5000Hz
Sjit-AC,
±0.5
%
VDD=13V±6Vpp;
0<fmod<150kHz;
dB=15mT8)
Current ripple @ ΔVDD =0V
dI @dV
=0V
pulse shape: triangular8)
pulse
height
1
mA
ns
pulse
400
length
Pulse width for speed pulse
Pulse width for data bits
Standstill time
tp
40
50
50
150
25
50
60
us
us
ms
us
us
Triggerlevel=10.5mA8)
8)
tp
40
60
8)
8)
8)
tstop
120
20
180
30
Pulse width tp/2 for initial bit
tp/2
Pulse width tp for time output
offset due to bit stump
suppression
tp_Bit_supp
40
60
Systematic phase error of output
edges during start-up and
uncalibrated mode
-90
90
°
°
Systematical phase error of
“uncal” edge;
nth vs. n + 1th edge (does
not include random phase
error)8)
8)
Phase shift from uncalibrated to
calibrated mode
-10
8
10
26
16
Current slew rate
SRr, SRf
nswd
mA/us 10% and 90% value
RM=50Ω, TJ<170°C
9)8)
Signal watchdog reset
16
edges
1) All parameters refer to described test circuit in this document. See chapter 3.1 Test circuit
2) after power on or chip reset
3) Same direction assumed
4) After power, chip reset or direction reset (after timer watchdog)
Data Sheet
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TLE4943C
5) Change of direction of rotation only once assumed
6) Direction information is updated at every speed protocol! The direction bit corresponds in any case with the physical reality
of the direction of rotation.
7) due to digital quantization jitter can not be below 0.7us. Additional analog jitter
8) Not subject to production test, verified by design/characterization
9) If no switching of sensor is detected during 750ms (+/-20%) signal watchdog is activated and direction detection is resetted
(GDR=0). After 16 edges (detected with dB_2 x dBlimit) sensor resets itself and goes into uncalibrated mode
Data Sheet
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TLE4943C
3.5
Magnetic Characteristics
Table 7
Magnetic characteristic (amplitude values)
Parameter
Symbol
Values
Unit
Note / Test Condition
Min.
Typ.
Max.
1.34
+3
Limit threshold1) 2)
Limit threshold drift
dBlimit
0.3
0.8
mT
%
99% criteria (1 of 96)3)
dBlimit:Drift -5
additional drift over lifetime
at 25°C for one and the
same sensor
Limit range Bit1)
dBLR
1.02
1.28
dBLR_Drift -5
1.6
1.6
2.18
1.92
+3
mT
mT
%
+/-36%, 99% criteria
TJ=10..40°C, 99% criteria
Limit range bit drift
additional drift over lifetime
at 25°C for one and the
same sensor
Ratio dBLR / dBlimit
1.7
2.0
0.8
2.5
1.441)
Minimum signal for direction
detection
dBdirmin
0.4
mT
valid for GDR=0;
dB_dir=center-(left+right)/2
; cal mode, 99% criteria
Validity of signal amplitude
measurement
SLM
“0” = valid, invalid after
under-voltage and initial
value after power up
Signal amplitude (Level in relation LM=0
to LR)
LM=1
<0.8
>0.8
<=1
>1
<=1.2
>1.2
99% criteria, according to
AK
LM=2
LM=3
LM=4
LM=5
LM=6
LM=7
>1.48 >1.75
>2.1
>2.5
>4.2
>7.0
>2.95
>4.95
>8.25
>3.6
>6.0
>9.9
>12.0 >14.2
>21.0 >24.7
>17.1
>29.7
1) value tested at 0h
2) valid and characterized for f >1Hz
3) 50% criterion has typ. value of 0.7mT .
Note:All magnetic values are calculated out of measured sensitivity of each single Hall element.
Data Sheet
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TLE4943C
Figure 25 LM bits which are transferred at protocol with increasing magnetic field dB
Data Sheet
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TLE4943C
3.6
Degradation of Direction Signal
Direction signal is calculated as following “dB_direction = center - (left + right) / 2”. The direction detection is
optimized for a target wheel pitch of 5 mm. For pitches other than 5 mm the magnetic input signal has to be
increased to compensate signal loss accordingly. For an ideal pitch of 5mm the absolute speed signal in mT is two
times higher than direction signal due to differential principle. Speed signal in figure below is normalized to
magnetic speed signal for a pitch of 5mm. Also direction signal is normalized to speed signal (means degradation
factor=0.5) and to an ideal pitch of 5mm. Absolute values in mT are half of speed signal.
1,0
Deg_speed_norm
0,9
Deg_dir_norm
0,8
0,7
0,6
0,5
0,4
0,3
0,2
0,1
0,0
0
1
2
3
4
5
6
7
8
9
10
11
12
Pitch / mm
Figure 26 Degradation of speed and direction signal dependent on used target wheel pitch
Data Sheet
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TLE4943C
3.7
Change of Direction of Encoder
A local extremum (maximum or minimum) of the magnetic input signal can be caused during a reversal of rotation
direction. In this case the local extremum can be detected by the IC and used for offset calibration. (E.g. the local
maximum marked by an arrow in the diagram below.) Obviously the calculated offset value will be incorrect with
respect to the following signal. As worst case a duty cycle up to max. 15% to 85% could occur for a few pulses.
After a re-calibration, which typically takes place after 2...3 zero-crossings the offset will be correct again and
hence the duty cycle. A local extremum is detected when the extremum exceeds the value of half of the difference
between the two previous extreme (dB > 0.25*dBpp). Smaller extrema are not deteced. As a result of "bad" duty
cycle after fast direction reversal the sampling points for direction detection are at unusual signal phase angles
also.
At a change of rotation direction in calibrated mode two consecutive samples of dBdir have the same sign therefore
direction detection is set to invalid. To guarantee a valid direction the next zero crossings after change of direction
are used to detect direction. The direction information validity at those two speed pulses is set to invalid and
direction of rotation is set to default. Also, the validity of signal amplitude measurement is set to invalid, signal
amplitude contains default values and LR is set to 0 (no error). At the latest with the third pulse after direction
reversal, direction information is valid and direction is issued again. Signal amplitude validity is set to valid and its
according signal amplitude measurement and LR is issued after two new valid extrema are found.
Data Sheet
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TLE4943C
Change of direction of rotation
dBmaximum1
dB
2 x
dB
(dBminimum1+dBmaximum1)/2
dBminimum1
limit
(dBminimum2+dBmaximum1)/2
dBminimum2
GDR=inv
SLM=inv
DR =def
LM =def
LR=OK
GDR=inv
GDR=inv
SLM=inv
DR =def
LM =def
LR=OK
GDR=inv
SLM=inv
DR =def
LM =def
LR=OK
SLM=inv
DR =def
LM =def
LR=OK
dBdir[n-2]
dBdir
negative
dBdir[n-1]
negative
dBdir[n]
Actual time: n
positive direction
negative direction
detected
Figure 27 Signal behavior when direction of rotation changes
Data Sheet
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TLE4943C
3.8
Watchdog Reset after Offset Jump
C
D
B
dB
Offsetjump
A
Watchdog timer
Signal watchdog
Uncal Mode
Reset
Standstill protocol
Figure 28 Reset is triggered after watchdog delay time and signal watchdog
When an offset jump, greater than the amplitude of the magnetic speed signal occurs, no zero crossing is passed
anymore and therefore sensor outputs no speed pulse. Instead, standstill protocol is issued. After transmitting five
standstill protocols (typ. 750ms) the signal watchdog starts. If still no speed pulse is output sensor starts to detect
extreme with minimum DNC (digital noise constant). After detecting nswd extreme and still no speed pulse issued,
sensor triggers internal reset and enters uncalibrated mode. Therefore validity of direction, direction information,
validity of airgap and airgap measurement are set to default values. This represents the same status as after
power on. Therefore offset calibration starts again.
Data Sheet
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TLE4943C
4
Electro Magnetic Compatibility
EMC Test Circuit Figure 28 is used.
Additional Information:
Characterization of Electro Magnetic Compatibility are carried out on sample base of one qualification lot. Not all
specification parameters have been monitored during EMC exposure. Only key parameters e.g. switching current
and duty cycle have been monitored.
Table 8
Ref. ISO 7637-2; 2004; (values depend on RM); dB=2mT (amplitude of sinus signal);
V
DD=13.5V; fB=100Hz, T=25°C, RM=30Ω
Parameter
Symbol
Level/Typ
IV / -100V
Status
Testpulse 1
VEMC
C/ A (after stress)
Testpulse 2a1)
Testpulse 2b
Testpulse 3a
Testpulse 3b
Testpulse 4
IV / 75
A2)
C3)
A
- / 10V
IV / -150V
IV / 100V
IV / -7V
A
B
Testpulse 5a
Testpulse 5b
IV / 86.5V
Us* = 28.5V4)
C
C
1) ISO 7637-2 describes internal resistance = 2 Ω (former 10 Ω)
2) Node A (see figure 1) does not exceed 22V clamping voltage of D2 in any case.
3) Ri = 0.01 Ω
4) A central load dump protection of 42V is used. Us* = 42V - 13.5V
Table 9
Ref. ISO 7637-3 Release 19951); dB=2mT (amplitude of sinus signal); VDD=13.5V; fB=100Hz,
T=25°C, RM=30Ω
Parameter
Testpulse 1
Testpulse 2
Testpulse 3a
Testpulse 3b
Symbol
Level/Typ
IV / -30V
Status
VEMC
A
A
A
A
IV / 30V
IV / -60V
IV / 40V
1) Testpulse 1 and 2 are carried out with capacitive coupling clamp even if ISO7637-3 test pulse 1 and 2 is not requesting for
capacitive coupling clamp
Table 10
Ref. ISO 11452-3, 2nd edition 2001-03-01 measured in TEM-cell
Parameter
Symbol
Level/Typ
IV / 250V/m
Status
ETemCell
CW; AM=80%, f=1kHz
Data Sheet
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TLE4943C
VDD
Figure 29 EMC Test Circuit
Components:
D1 = Reverse polarity protoection diode, e.g. 1N4007
D2 = 22V
C1= 10uF
C2 = 1nF
RM = 30 Ω
Data Sheet
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5
Package Information
Pure tin covering (green lead plating) is used. Lead frame material is copper based, e.g. K62. Product is RoHS
(Restriction of Hazardous Substances) compliant and marked with the letter G in front of the data code marking
and contains a data matrix code on the rear side of the package. Please refer to your key account team or regional
sales if you need further information.
d=0.3±0.08mm
Distance chip to front side
(date code) of IC
Figure 30 Distance chip to upper side of IC
5.1
Lead Pull Out Force
The lead pull out force according IEC 60068-2-21 (fifth edition 1999-1) is 10N for each lead.
5.2
Glass Transition Temperature (TG)
Typical glass transition temperature is 165°C (minimum 160°C) measured according dynamic-mechanical-
analysis (DMA). The glass transition temperature can not be measured in production as separate test vehicle is
needed for DMA. Material properties are covered by process parameters and handling instruction for post mold
curing.
The typical glass transition temperature is 165°C according DSC method. A TG measurement according DMA on
test vehicle for every incoming material batch is carried out.
Data Sheet
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TLE4943C
5.3
Packing and Package Dimensions of PG-SSO2-53
Figure 31 Packing Dimensions in mm of PG-SSO-2-53 (Plastik Single Small Outline Package)
Data Sheet
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TLE4943C
Figure 32 Package Dimensins in mm of PG-SSO-2-53 (Plastic Single Small Outline Package)
Data Sheet
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TLE4943C
5.4
Packing
You can find all of our packages, sort of packing and others on our Infineon Internet Page “Products”:
http://www.infineon.com/products
Data Sheet
47
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w w w . i n f i n e o n . c o m
Published by Infineon Technologies AG
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