Datasheet TLE5x09A16(D) (Infineon) - 23

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TLE5x09A16(D) Analog AMR/GMR Angle Sensor Specification 2.4 Error diagnosis
Each sensor provides two functions at its V pin. During normal operation the voltage measured at this pin DIAG is temperature dependent. The typical voltage at room temperature and the temperature coefficient are given in
Table 8
. The temperature accuracy is not part of the sensor qualification. The second purpose of pin V is the diagnosis functionality. In case the device detects an internal error, the DIAG pin is driven to a low level. Another option for obtaining partial diagnostic functions is the alternative configuration with pull-down resistors described in
Figure 16
. With this setting, it is not required to use the V pin, but internal error detection is also reduced. For further details please refer to the
Safety Manual
. DIAG
2.5 Angle performance
The overall angle error represents the relative angular error. This error describes the deviation from the reference line after zero angle definition. The typical value corresponds to an ambient temperature of 25°C. All other values correspond to the operating ambient temperature range -40°C < T < 125°C and through the A TLE5x09A16(D) lifetime.
Fully compensated performance
Using the algorithm described in the application note
“TLE5xxx(D) Calibration”
, it is possible to implement an ongoing automatic calibration on the microcontroller to greatly improve the performance of the TLE5x09A16(D), as temperature and lifetime drifts are better compensated. This is only possible in applications where a rotor is turning continuously.
Table 11 Residual angle error over temper Parameter Symbol V ature and lifetime1) alues Unit Note or Test Condition Min. Typ. Max.
Overall angle error AMR sensor α 0.1 0.5 ° 4) ERR,C (single-ended)2)3) Overall angle error AMR sensor α 0.1 0.5 ° 4) ERR,C (differential)2) Overall angle error GMR sensor α < 0.6 0.9 ° ERR,C (single-ended)2)3) Overall angle error GMR sensor α < 0.6 0.9 ° ERR,C (differential)2) 1) After perfect compensation of offset, amplitude synchronicity mismatch and orthogonality error. 2) Including hysteresis error. 3) Assuming a symmetrical load. 4) For AMR sensor only: an additional angle error of 0.2° applies to operation in the magnetic field 10 mT < B < 20 mT With this auto calibration algorithm, it is possible to reach an angular accuracy as good as the residual error of the sensing elements, which means the remaining error after perfect compensation of offset and amplitude synchronicity mismatch for both the AMR and the GMR sensors and perfect compensation of orthogonality error for the GMR sensor. A typical behavior of a fully compensated angle error with this ongoing calibration is shown in
Figure 21
for the GMR sensor and
Figure 22
for the AMR sensor for different ambient temperatures. The accuracy of the fully compensated angle is listed in
Table 11
, which is divided into single-ended and differential output of the sensor. Data Sheet 23 V 2.0 2018-12 Document Outline Features Functional Safety Product Validation Potential Applications Description Table of Contents 1 Functional description 1.1 General 1.2 Pin configuration 1.3 Pin description 1.4 Block diagram 1.5 Dual die angle output 2 Specification 2.1 Application circuit 2.2 Absolute maximum ratings 2.3 Sensor specification 2.3.1 Operating range 2.3.2 Electrical parameters 2.3.3 Output parameters 2.4 Error diagnosis 2.5 Angle performance 2.6 Electrostatic discharge protection 2.7 Electro magnetic compatibility (EMC) 3 Package information 3.1 Package parameters 3.2 Package outlines 3.3 Footprint 3.4 Packing 3.5 Marking 4 Revision history