TLE4966K Datasheet, PDF (7/16 Pages) Infineon Technologies AG – High Precision Hall-Effect Switch with Direction Detection

2
General
2.1
Block Diagram
TLE4966K
General
V_S
Voltage Regulator
(reverse polarity protected)
ESD
Oscillator
& Sequencer
Bias and
Compensation
Circuits
Chopped
Hall
Probe
Chopped
Hall
Probe
Amplifier Filter
Amplifier Filter
Comparator
with
Hysteresis
Direction
Detection
GND
Q2
Q1
Figure 2 Block Diagram
2.2
Circuit Description
The chopped Double Hall Switch comprises two Hall probes, bias generator,
compensation circuits, oscillator, and output transistors.
The bias generator provides currents for the Hall probes 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 probes 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.
Data Sheet
7
Rev. 1.0, 2007-09