TLE5012 datasheet(23/64 Pages) INFINEON

23 / 64 page

TLE5012

Specifications

Final Data Sheet

V 1.0, 2010-11

3.4.4

Angle Performance

After internal calculation the sensor has a remaining error, as shown in Table 11. The error value refers to BZ =

0mT and the operating conditions given in Table 3 “Operating range” on Page 18.

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

line after zero angle definition.

Autocalibration

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

temperature drift, lifetime drift, and misalignments.

The TLE5012 is a pre-calibrated sensor. After start-up, the parameters out of the laser fuses get loaded into flip-

flops. The TLE5012 needs more than a full revolution to generate new parameters. The update mode can be

chosen within the Interface Mode 2 register (AUTOCAL). The parameters are updated in a smooth way to avoid

an angle jump on the output. Therefore only one LSB will be changed within the choosen range or time. The

autocalibration is done continuously.

AUTOCAL Modes:

•

00: No autocalibration

•

01: Autocalibration Mode 1. Only one LSB to final values within the update time tupd (depending on FIR_MD

setting).

•

10: Autocalibration Mode 2. Only one LSB update over one full revolution. After update of one LSB, the

autocalibration will calculate the parameters again.

•

11: Autocalibration Mode 3. Only one LSB to final values within an angle range of 11.25°.

3.4.5

Signal Processing

The signal path of the TLE5012 is depicted in Figure 12. It consists of the GMR bridge, ADC, filter, and angle

calculation. Depending on the filter configuration, various total delay times are achieved. In addition 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. By enabling the prediction, the signal delay time can be reduced (Figure 13). The prediction uses

the difference between current and last angle value and calculates the output value by adding this difference to

the current value. A linear prediction is thereby achieved.

(3)

Table 9

Angle performance

Parameter

Symbol

Values

Unit

Note / Test Condition

Min.

Typ.

Max.

Overall Angle Error (with auto-

calibration)

αErr

-0.61)

1) At 25°C, B = 30 mT

1.0

including lifetime and

temperature drift2)3)4)

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.

4) Not subject to production test - verified by design/characterization

Overall Angle Error (without auto-

calibration)

αErr

-0.61)

1.6

including temperature

drift2)3)5)

5) 0 h

)

(

)

(

)

(

−

⋅

TLE5012 датащи(PDF) 23 Page - Infineon Technologies AG

TLE5012 датащи(HTML) 23 Page - Infineon Technologies AG

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

датащи скачать

ссылки URL