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TLE5010

Electrical and Magnetic Parameters

Draft

Preliminary Data Sheet

V 0.9, 2007-05

Orthogonality Definition

The corresponding maximum and zero crossing points of the SIN and COS signals are

not exactly in a distance of 90°. The difference between X and Y phase is called

’Orthogonality Error’

jideal = 0°

jX : Phase error of X (= cos) Signal

jY : Phase error of Y (= sin) Signal

5.4

Calibration

GMR Values

The end-of-line calibration can be done using following sequence.

The conditions are specified in Table 9.

• Turn magnetic field left and measure X and Y values

• Calculation of Amplitude, Offset, Phase correction values of left turn

• Turn further 90° left and 90° back right without measurement

• Turn magnetic field right and measure X and Y values

• Calculation of Amplitude, Offset, Phase correction values of right turn

• Calculation of mean values of Amplitude, Offset, Phase correction values

The above gained values have to be stored in a non-volatile memory. They are used for

the correction of the read-out X and Y values before the angular calculation.

The resulting angular deviation is calculated using above determined parameters.

Temperature Measurement

The signal amplitude

T25 of the temperature measurement path at calibration conditions

has to be measured and stored.

Calibration Conditions

All errors are related to a calibration done using following conditions:

Table 9

GMR calibration conditions

Parameter

Symbol Limit Values

Unit

Notes

min.

typ.

max.

Flux density

BCAL

BZ = 0 mT

Temperature

TCAL

°C

ϕϕ

–

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