TLE5012B datasheet(24/50 Pages) INFINEON

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TLE5012B

Specification

Data Sheet

Rev. 2.0, 2014-02

4.3.4

Angle Performance

After internal calculation, the sensor has a remaining error, as shown in Table 4-9. The error value refers to BZ=

0mT and the operating conditions given in Table 4-2 “Operating range and parameters” on Page 19.

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

line after zero-angle definition. It is valid for a static magnetic field.

If the magnetic field is rotating during the measurement, an additional propagation error is caused by the angle

delay time (see Table 4-10 “Signal processing” on Page 27), which the sensor needs to calculate the angle

from the raw sine and cosine values from the MR bridges. In fast-turning applications, prediction can be enabled

to reduce this propagation error.

If autocalibration (see Chapter 4.3.5) is enabled and the temperature changes by more than 5 Kelvin during 1.5

revolutions an additional error has to be added to the specified angle error in Table 4-9. This error depends on the

temperature change (Delta Temperature) as well as from the initial temperature (Tstart) as shown in Figure 4-3.

Once the temperature stabilizes and the application completes 1.5 revolutions, then the angle error is as specified

in Table 4-9.

For negative Delta Temperature changes (from higher to lower temperatures) the additional angle error will be

smaller than the corresponding positive Delta Temperature changes (from lower to higher temperatures) shown

in Figure 4-3. The Figure 4-3 applies to the worst case.

Table 4-9

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 = 30mT

1.0 °

Including lifetime and

temperature drift2)3)4). Note:

in case of temperature

changes above 5 Kelvin

within 1.5 revolutions refer

to Figure 4-3 for additional

angle error.

2) Including hysteresis error, caused by revolution direction change

3) 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)

1.3 °

Including temperature

drift2)3)5)

5) 0h

1.9 °

Including lifetime and

temperature drift2)3)4)

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