EmbeddedRelated.com
    Parts    AH3761-WG-7
AH3761-WG-7

DIOAH3761-WG-7

Diodes Incorporated
Digital Switch Latch Open Drain Hall Effect SC-59-3
Active10,672 in stock
Datasheet Digi-Key Mouser Compare Prices

Overview

The AH3761-WG-7 is a high-voltage, high-sensitivity Hall effect latch designed for brushless DC motor commutation and speed sensing. It features a wide supply range of 3V to 28V and integrated protection mechanisms including reverse battery and output short-circuit protection. The device utilizes chopper-stabilized technology to ensure magnetic switch point stability across its -40C to 125C operating temperature range.

Why Choose This Part

This sensor offers robust electrical protection with built-in voltage overshoot and power reverse protection up to 30V. Its high-sensitivity 6mT trip point allows for larger air gaps between the sensor and the magnet, simplifying mechanical design. The open-drain output can sink up to 100mA, providing flexibility for various pull-up logic levels or driving small loads directly.

Applications

BLDC Motor Commutation
Providing precise rotor position feedback for controlling brushless DC motors in fans, pumps, and blowers.
Speed and RPM Sensing
Monitoring rotational speed in industrial machinery and automotive sub-systems using a multi-pole ring magnet.
Flow Meters
Detecting the rotation of internal impellers to measure liquid or gas flow rates in industrial environments.
Angular Position Sensing
Used in rotary encoders and control knobs to detect incremental movement and direction.

Key Specifications

Features Temperature Compensated
Function Latch
Technology Hall Effect
Output Type Open Drain
Polarization South Pole
Mounting Type Surface Mount
Sensing Range 6mT Trip, -6mT Release
Package / Case TO-236-3, SC-59, SOT-23-3
Test Condition 25degC
Voltage - Supply 3V ~ 28V
Operating Temperature -40degC ~ 125degC (TA)
Current - Output (Max) 100mA
Current - Supply (Max) 6mA
Supplier Device Package SC-59-3

Getting Started

To evaluate the AH3761-WG-7, connect a pull-up resistor (typically 1k to 10k ohms) between the output pin and a logic supply of up to 28V. Place the SC59 package in close proximity to a rotating multi-pole magnet, ensuring the south pole faces the branded side of the package to trip the latch. Use an oscilloscope to verify the square wave output as the magnetic poles toggle the device state.