■ General Description

AH173 is a single-digital-output Hall-effect sensor with pull-up resistor for high temperature operation. The device includes an on-chip Hall voltage generator for magnetic sensing, an amplifier to amplify Hall voltage, and a comparator to provide switching hysteresis for noise rejection, and an output driver with a pull-up resistor (Rpu). An internal bandgap regulator is used to provide temperature compensated supply voltage for internal circuits and allows a wide operating supply range. While the magnetic flux density (B) is larger than operate point (Bop), the OUT pin turns on (low). If B moves toward release point (Brp), the OUT pin is latched “on” state prior to B

■ Features

- Bipolar Hall effect latch sensor

- 3V to 20V DC operation voltage

- Built-in pull-up resistor

- 25mA output sink current

- Operating temperature: −40°C ~ +125°C

- Package: SIP3, SOT23

■ Applications

- Rotor position sensing

- Current switch

- Encoder

- RPM detection