TLE5012 datasheet(21/57 Pages) INFINEON

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TLE5012

Specification

Target Data Sheet

V 0.46, 2009-09

3.4.4

Angle Performance

After internal calculation the sensor has a remaining error, as shown in Table 7. The error value refers to BZ = 0mT

and the operating conditions given in Table 3 “Operating Range” on Page 17.

The overall angle error represents the relative angle error. This error describes the deviation to the reference line

after zero angle definition.

Autocalibration

The autocalibration enables online parameter calculation and reduces therefore the angle error due to

misalignments.

After start-up the parameters out of the fuses get loaded into flip-flops. The TLE5012 updates these parameters

after a full revolution. The update can be chosen within the Autocalibration Mode (AUTOCAL) bit. It is possible to

do the update after every 22.5°, 11.25° or after tupd.

3.4.5

Signal Processing

The signal path of the TLE5012 is depicted in Figure 11. It consists of the GMR-bridge, ADC, filter and angle

calculation. Depending on the filter configuration a different total delay time is achieved. Additional to this delay

time, the delay time of the interface has to be considered. The delay time leads to an additional angle error at

higher speeds. With enabling the prediction, the signal delay time will be reduced (Figure 12).

Figure 11

TLE5012 Signal path

At FIR_MD = 0 only raw values can be read out, due to the more time consuming angle calculation.

Table 7

Angle Performance

Parameter

Symbol

Values

Unit

Note / Test Condition

Min.

Typ.

Max.

Overall Angle Error (with auto-

calibration)

Err

0.61)

1) At 25°C, B =30 mT

1.0

including lifetime and

temperature drift2)3)

2) Including hysteresis error, caused by revolution direction change.

3) Only with calibrated GMR-compensation parameters of customer setup; Relative error after zero angle definition.

Overall Angle Error (without auto-

calibration)

Err

0.61)

1.6

including temperature

drift2)3)

GMR

SD-

ADC

SD-

ADC

Angle

Calculation

Filter

TLE5012

Microcontroller

del

delIF

upd

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