1 Features

? Digital Unipolar-Switch Hall Sensor

? 2.5-V to 5.5-V Operating VCC Range

? Magnetic Sensitivity Options (BOP, BRP):

– DRV5021A1: 2.9 mT, 1.8 mT

– DRV5021A2: 9.2 mT, 7.0 mT

– DRV5021A3: 17.9 mT, 14.1 mT

? Fast 30-kHz Sensing Bandwidth

? Open-Drain Output Capable of 20 mA

? Optimized Low-Voltage Architecture

? Integrated Hysteresis to Enhance Noise Immunity

? Operating Temperature Range: –40°C to +125°C

? Standard Industry Package:

– Surface-Mount SOT-23

2 Applications

? Home Appliances

? Industrial Valves, Solenoids

? Limit Switches

? General Proximity Sensing

? Brushed DC Motor Feedback

? Docking Detection

? Door Open and Close Detection

? Pulse Counting

3 Description

The DRV5021 device is a low-voltage, digital-switch,

Hall effect sensor for high-speed applications.

Operating from a 2.5-V to 5.5-V power supply, the

device senses magnetic flux density, and gives a

digital output based on predefined magnetic

thresholds.

This device senses magnetic fields perpendicular to

the face of the package. When the applied magnetic

flux density exceeds the magnetic operate point (BOP)

threshold, the open-drain output of the device drives

a low voltage. When the flux density decreases to

less than the magnetic release point (BRP) threshold,

the output goes to high impedance. The hysteresis

resulting from the separation of BOP and BRP helps

prevent output errors caused by input noise. This

configuration makes system designs more robust

against noise interference.

The device operates consistently across a wide

ambient temperature range of –40°C to +125°C.