TLE4942-2C
description initial settling time peak detection d2 d2 offset= (m ax + min) / 2 offset correction d1 d1 d2
7 standstill pulse (cut off)
PGA switching uncalibrated mode calibrated mode
Fig. 1: example for start-up behaviour
Uncalibrated mode: Occasionally a short initial offset settling time td,input might delay the detection of the input signal. (The sensor is "blind"). The magnetic input signal is tracked by the speed ADC and monitored within the digital circuit. For detection the signal transient needs to exceed a threshold (digital noise constant d1). When the signal slope is identified as a rising edge (or falling edge), a parator is triggered. The parator is triggered again as soon as a falling edge (or rising edge respectively) is detected (and vice versa). Depending on the initial state of the parator the IC output is first triggerd on the first or second detected edge. Between the startup of the magnetic input signal and the time when its second...
