Omnipolar Hall Effect sensors deliver stability over wide operating range
Test & Measurement
Diodes Incorporated now offers the AH1911 and AH1921 digital Hall Effect sensors, which couple market-leading stable operating and release points (Bop and Brp) with ultra-low power operation. The third generation devices will respond to both polarity of a magnetic field and feature a ‘hibernating clock’ system to lessen average current consumption to 1.6µA at 3V supply.
A wide operating voltage range of 1.6V to 5.5V allows the parts to be used with a mixture of system voltages. Operating and release points for the magnetic switch are tightly controlled over temperature and supply voltage due to its advanced stabilising technique, producing an accurate and repeatable performance. Flux density switching points are typically ±60 Gauss (6mT) to operate and ±45 Gauss (4.5mT) to release.
The devices are perfect for battery-powered devices where its ultra-low power consumption and broader operating voltage range support extended battery life. Typical applications include medical and consumer products, smoke detectors, tamper detection for e-meters, IoT devices and general level/proximity detection.
“These sensors, with their stable BOP/BRP and ultra-low power consumption, provide market-leading performance at the best cost/performance ratio,” said Charles Kuo, worldwide sensor marketing manager for Diodes Incorporated.