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AH1802-WG-7

DIOAH1802-WG-7

Diodes Incorporated
Digital Switch Omnipolar Switch Open Drain Hall Effect SC-59-3
Active8,492 in stock
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Overview

The AH1802-WG-7 is a high-sensitivity, micropower omnipolar Hall effect switch designed for battery-operated handheld and consumer equipment. It utilizes a chopper-stabilized design to ensure reliable magnetic switching points and superior temperature stability across its operating range. This device responds to either a North or South pole and features an open-drain output for easy interfacing with digital logic.

Why Choose This Part

The component excels in power-sensitive designs with a typical average supply current of only 8uA. Its omnipolar operation simplifies assembly by removing the need to identify the magnetic pole orientation during installation. Additionally, the SC59 package offers high ESD protection of over 6kV and stable operation from 2.5V to 5.5V.

Applications

Lid and Cover Detection
Used in laptops and smartphones to detect the open or closed state of lids or flip covers for power management.
Contactless Limit Switches
Provides non-contact position sensing in industrial machinery and consumer appliances where mechanical wear must be avoided.
Proximity Sensing
Ideal for reed switch replacement in security systems and door/window sensors due to its low power consumption.
Portable Gas and Water Meters
Senses internal magnetic rotations for flow measurement in battery-powered utility meters.

Key Specifications

Function Omnipolar Switch
Technology Hall Effect
Output Type Open Drain
Polarization North Pole, South Pole
Mounting Type Surface Mount
Sensing Range +/-4mT Trip, +/-1mT Release
Package / Case TO-236-3, SC-59, SOT-23-3
Test Condition 25degC
Voltage - Supply 2.5V ~ 5.5V
Operating Temperature -40degC ~ 85degC (TA)
Current - Supply (Max) 16uA
Supplier Device Package SC-59-3

Getting Started

To integrate this sensor, connect the supply voltage (2.5V to 5.5V) and place a pull-up resistor on the open-drain output pin. Ensure the bypass capacitor (typically 0.1uF) is located close to the VDD and GND pins to mitigate RF noise. Since this part is listed as Not Recommended for New Design (NRND), engineers should verify stock availability or transition to newer pin-compatible alternatives for production runs.

Also Consider

DRV5032 TITexas Instruments - An ultra-low-power digital Hall effect switch that offers even lower average current consumption for battery-critical applications.
BU52011HFV Rohm Semiconductor - Provides micropower omnipolar sensing in a very small HVSOF5 package for space-constrained designs.