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TLE4942-2

Differential Two-Wire Hall Effect Sensor IC

Infineon Technologies 

TLE4942-2, TLE4942-2C Supplement

2 Additions/Changes for TLE4942–2 versus TLE4942

(All values are valid for constant amplitude and offset of input signal, f<2500Hz)

Parameter

Signal behaviour after

undervoltage or

standstill>tStop

Symbol

nDZ-Start

min. typ. max. Unit

Conditions

Magnetic edge

amplitude according to

∆Bˆ Limit, early startup

Edges that occur before

nDZ-Start can be

suppressed

2 pulses 1Hz ≤ f ≤ 2000Hz

Systematic phase error

of output pulses during

startup- and

uncalibrated mode

Phase shift change

during PGA switching

Phase shift change

during transition from

uncalibrated to

calibrated mode

∆Φswitch

Number of pulses in

uncalibrated mode

in rare cases (see

appendix B)

nDZ-Startup

nDZ-Startup

Number of pulses with

invalid supplementary

information

nDR-Startup

in rare cases (see

application notes)

nDR-Startup

3 pulses f > 2000Hz

td,input has to be taken

into account

Shortest time delay

38 45 52 µs

between pulse 0 (stop

pulse) and pulse 1

td,input has to be taken

into account

Shortest time delay

38 45 52 µs

between

wheel speed pulse 1

and 2

Systematical phase

-88

+88 °

error of “uncal” pulse;

nth vs. n+1th pulse

(does not include jitter)

0

80 °

-90

+90 °

6 pulses

8 pulses

9 pulses

11 pulses

After nDR-Startup pulses

the supplementary

information is correct

(starting with the

nDR-Startup+1-th pulse the

pulse length is correct)

TLE4942-2 - TLE4942-2C Data sheet supplement 7

February 2002

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