TLE4916-1K Datasheet, PDF (7/16 Pages) Infineon Technologies AG – Low Power Automotive Hall Switch

2.4
Block Diagram
TLE4916-1K
Functional Description
V_S
Bias andCompensation
Circuits
Active Error
Compensati on
Osci l l ator
and
Sequencer
Threshol d
Generator
Chopped
Hall Probe
Amplifier
Logic
Comparator
with
Hysteresi s
Q
GND
Figure 2 Functional Block Diagram
2.5
Functional Block Description
The TLE4916-1K is an integrated Hall-Effect Sensor designed specifically to meet the requirements of low-power
applications with operating voltages of 2.4V - 5.0V.
Precise magnetic switching points and high temperature stability are achieved through the unique design of the
internal circuit.
An onboard clock scheme is used to reduce the average operating current of the IC.
During the operating phase the IC compares the actual magnetic field detected to the internally compensated
switching points. The output Q is switched at the end of each operating phase.
During the stand-by phase the output stage is latched and the current consumption of the device reduced to 4µA
µA (typ. value).
The IC switching behaviour is designed as a latch, i.e. it can be switched on (Q = LO) with the south pole of a
magnet and switched off (Q = HI) with the north pole.
.
Datasheet
5
Rev.1.0, 2010-02-23