Datasheet Diodes AH3978Q — Datenblatt

AH3975Q/AH3976Q/AH3977Q/AH3978Q
AUTOMOTIVE DUAL HALL EFFECT LATCH WITH SPEED & DIRECTION
OUTPUTS INTEGRATED SELF-DIAGNOSTICS Description Pin Assignments The AH3975Q/AH3976Q/AH3977Q/AH3978Q is an AEC-Q100
qualified high voltage dual Hall-effect sensor designed for the
applications that require accurate speed and direction sensing. To
support wide range of demanding applications, the design has been
optimized to operate over the supply range of 2.7V to 27V. With
chopper stabilized architecture and an internal bandgap regulator to
provide temperature compensated supply for internal circuits, the
AH3975Q/AH3976Q/AH3977Q provides speed and direction outputs,
while AH3978Q provides two independent outputs at Q1 and Q2. (Top View) For robustness and protection, the device has a reverse blocking diode
with a Zener clamp on the supply. The built-in thermal protection also
shuts down the chip if temperature rises to an abnormal value, and it
will automatically restart the chip once the junction temperature drops
below the safe value. The device is integrated with self-diagnostics
which monitor internal blocks, and it will enter safe mode when error is
detected.
In the occasion of a supply voltage drop to minimum threshold point,
undervoltage lockout protection would be triggered to freeze the
device, which prevents the electrical malfunction from affecting the next
magnetic measurement circuits, and the output current state updated
is always based on the proper accurate measurement result. Features and Performance VDD 1 GND 2 GND 3 5 DIR/Q1 4 SP/Q2 TSOT25 (Type A1) Applications Power closures with anti-pinch features
Rotation speed & direction detection …