TLE5309D datasheet(21/30 Pages) INFINEON

21 / 30 page

Data Sheet

V 1.1

2017-10

TLE5309D

Dual GMR/AMR Angle Sensor

Specification

2.4

Error diagnosis

Each sensor provides two functions at its VDIAG pin. During normal operation the voltage measured at this pin

is temperature dependent. The typical voltage at room temperature and the temperature coefficient are given

in Table 5 “Electrical parameters” on Page 16.

The second purpose of pin VDIAG is the diagnosis functionality. In case the device detects an internal error, the

pin is driven to a low level. The errors that can be detected by monitoring the status of the VDIAG pin are:

• Overvoltage at VDD (supply)

• Undervoltage at VDD (supply)

• Undervoltage at internal nodes (analog voltage regulator and/or GMR voltage regulator)

• Bandgap failure (temperature)

• Oscillator failure (only tested at startup)

• Parity check of configuration fuses (only tested at startup)

Not all the failure conditions that are detected by the VDIAG pin are also detected by the alternative

configuration with pull-down resistors described in Figure 14. For further details please refer to the Safety

Manual.

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 < TA < 125°C and through the

TLE5309D lifetime.

Fully compensated performance

Using the algorithm described in the application note “TLE5009 Calibration”, it is possible to implement an

ongoing automatic calibration on the microcontroller to greatly improve the performance of the TLE5309D, as

temperature and lifetime drifts are better compensated. This is only possible in applications where a rotor is

turning continuously.

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

Table 8

Residual angle error over temperature and lifetime1)

1) After perfect compensation of offset, amplitude synchronicity mismatch and orthogonality error.

Parameter

Symbol

Values

Unit

Note or Test Condition

Min.

Typ.

Max.

Overall angle error AMR sensor

(single-ended)2)3)

2) Including hysteresis error.

3) Assuming a symmetrical load.

αERR

0.1

0.5

Overall angle error AMR sensor

(differential)2)

αERR

0.1

0.5

Overall angle error GMR sensor

(single-ended)2)3)

αERR

< 0.6

0.9

Overall angle error GMR sensor

(differential)2)

αERR

< 0.6

0.9

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