The AH174 is a single-digital-output Hall-effect sensor designed for high temperature operation. It features an on-chip Hall voltage generator for magnetic sensing, an amplifier to amplify the Hall voltage, a comparator to provide switching hysteresis for noise rejection, and an open-collector output pre-driver. The device also includes an internal bandgap regulator for temperature compensated supply voltage and a wide operating supply range.
The AH174 Hall‑effect latch sensor is designed for high‑temperature environments and provides an inverted output stage. It includes an on‑chip Hall voltage generator, amplifier, comparator with hysteresis, and an open‑collector pre‑driver, all powered by an internal bandgap regulator.
Typical applications include rotor‑position sensing, current switching, encoder feedback, and RPM detection. The device is offered in SIP‑3L and SOT‑23‑3L packages and features reverse‑connection protection and a wide operating temperature range.
| Operating voltage | 3.5 V to 20 V DC |
|---|---|
| Output sink current | 25 mA |
| Operating temperature range | ‑40 °C to +125 °C |
| Package types | SIP3, SOT23 |
| Supply voltage (max) | 20 V |
| Output "off" voltage (max) | 20 V |
| Storage temperature range | ‑65 °C to +150 °C |
| Power dissipation (SIP) | 550 mW |
| Power dissipation (SOT23) | 230 mW |
| Magnetic operate point Bop (grade A) | 15‑60 Gauss |
| Magnetic release point Brp (grade A) | -60 to -15 Gauss |
| Magnetic hysteresis Bhy (grade A) | 80 Gauss |
The AH174 operates from 3.5 V to 20 V DC.
It can sink up to 25 mA of current.
The sensor works from –40 °C up to +125 °C.
The device is offered in SIP3 and SOT23 packages.