TLE4966-2K Datasheet, PDF (7/14 Pages) Infineon Technologies AG – High Precision Hall Switch with two Outputs

2
General
2.1
Block Diagram
V_DD
TLE4966-2K
General
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
GND
Q2
Q1
Figure 2 Block Diagram
2.2
Circuit Description
The chopped Dual 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 influence of 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
thresholds.
Datasheet
7
Rev.1.0, 2010-06-28