TLE4976-1H

Data Sheet

2/9

2003-11-20

Circuit Description

The chopped Hall IC Switch comprises a Hall probe, bias generator, compensation

circuits, oscillator, and a current output.

The bias generator provides currents for the Hall probe and the active circuits.

Compensation circuits stabilize the temperature behavior and reduce technology

variations.

The Active Error Compensation rejects offsets in signal stages and the influence of

mechanical stress to the Hall probe caused by molding and soldering processes and

other thermal stresses in the package. This chopper technique together with the threshold

generator and the comparator ensures high accurate magnetic switching points.

Figure 1 Block Diagram

Vs

-

+

Bias and Compensation

Circuits

NC

Filter

Amplifier

Oscillator

&

Sequencer

GND

1

ESD

Comparator

with

Hysteresis

2

3

Chopped

Hall Probe

Voltage Regulator

(reverse polarity protected)