Omnipolar Hall-effect sensors are stable over a wide operating range
Digital Hall-effect sensors from Diodes combine what the company describes as maket-leading stable operating and release points (Bop and Brp) with low power operation. The AH1911 and AH1912 sensors are both available in the industry standard SC59 package.
The AH1911 sensors will respond to either polarity of magnetic field, explains the company, and have a ‘hibernating clock’ system to reduce average current consumption to 1.6 microA at 3V supply.
The wide operating voltage range of 1.6 to 5.5V enables the parts to be used with a variety of system voltages. Operating and release points for the magnetic switch are tightly controlled over temperature and supply voltage due to a stabilising technique, delivering accurate and repeatable performance. Flux density switching points are typically ±60 Gauss (6mT) to operate and ±45 Gauss (4.5mT) to release.
Both the AH1911 and AH1921 are suitable for battery-powered devices where its low power consumption and wider operating voltage range promote extended battery life. Typical applications include medical and consumer products, tamper detection for e-meters, smoke detectors, IoT devices and general level/proximity detection.
The AH1911 and AH1921 feature push-pull and open-drain outputs, respectively. Both are specified to operate over the -40 to +85 degrees C temperature range and have a high ESD rating of 6kV (human body model).
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