Ultra-Low Power Omnipolar Hall Effect Switch

The AH1911 and AH1921 are third generation ultra-low power omnipolar Hall effect switch ICs from Diodes’ broad Hall effect switches family. Due to the hibernating clocking system, the AH1911 and AH1921 only consume 1.6 μA (@ 3 V) in average, making the AH1911 and AH1921 perfectly fit for battery-powered consumer products, e-meters, smoke detectors, and IoT devices. The wider range of supply voltage (1.6 V to 5.5 V) extends battery operating time and supports low voltage system microcontrollers, which provides great flexibility for system design. The advanced chopper stabilized design can ease designers’ minds for switching point drift over temperature and supply voltage. The AH1911 and AH1921 have superior temperature stability among industry peers and come in the industry-standard SC59 package.

Features

• High ESD voltage rating of 6 kV human body model (HBM)
• Ultra-low power only 1.6 µA @ 3 V ultra-low average supply current to extend battery lifetime, thanks to the hibernating clocking system design
• Wider input voltage range with wider operating input voltage range from 1.6 V to 5.5 V offered great flexibility for system design
• High reliability and very stable B_OP/B_RP with advanced chopper stabilized design providing minimal switching point drift over supply voltage range and superior temperature stability

Applications

• IoT systems
• Medical devices
• Level, proximity, and position detection
• E-locks, smoke detectors, home appliances
• Smart cover or dock detection for cellular phones and tablet PCs
• Gas or water consumption measurement in remote, battery-powered utility meters