TLE5012B datasheet(43/50 Pages) INFINEON

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TLE5012B

Specification

Data Sheet

Rev. 2.0, 2014-02

Step/Direction Mode

Phase A pulses out the increments and phase B indicates the direction.

Figure 4-20 Incremental interface with Step/Direction mode

4.5

Test Mechanisms

4.5.1

ADC Test Vectors

In order to test the correct functionality of the ADCs, the ADC inputs can be switched from the GMR bridge outputs

to a chain of fixed resitors which act as a voltage divider. The ADCs are then fed with test vectors of fixed voltages

to simulate a set of magnet positions. The functionality of the ADCs is verified by checking the angle value (AVAL

Registers ADCTV_Y and ADCTV_X are used to select the test vector, as shown in Figure 4-21.

The following X/Y ADC values can be programmed:

•

4 points, circle amplitude = 70% (0°,90°, 180°, 270°)

•

8 points, circle amplitude = 100% (0°, 45°, 90°, 135°, 180°, 225°, 270°, 315°)

•

8 points, circle amplitude = 122.1% (35.3°, 54.7°, 125.3°, 144.7°, 215.3°, 234.7°, 305.3°, 324.7°)

•

4 points, circle amplitude = 141.4% (45°, 135°, 225°, 315°)

Note: The 100% values typically correspond to 21700 digits and the 70% values to 15500 digits.

Table 4-24 Incremental Interface

Parameter

Symbol

Values

Unit

Note / Test Condition

Min.

Typ.

Max.

Incremental output frequency

fInc

1.0 MHz

Frequency of phase A and

phase B1)

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

Index pulse width

t0°

μs0°1)

Table 4-25 ADC test vectors

X/Y values (decimal)

Min.

Typ.

Max.

000

001

15500

010

21700

011

32767

1001)

101

-15500

Step

Counter

Direction

Incremental Interface

(Step /Direction Mode)

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