Description
The AH1802 is a ultra-sensitivity, micropower Omnipolar Hall Effect switch IC designed for portable and battery powered equipment such as cellular phones, PDA’s and portable PC’s. Based on two sensitive Hall Effect plates and a chopper stabilized architecture the AH1802 provides a reliable solution over the whole operating range. To support portable and battery powered equipment the design has been optimized to operate over the supply range of 2.5V to 5.5V and consumes only 24uW with a supply of 3V.

FEATUREs
• Omni-polar (north or south pole) operation
• High sensitivity
• Single open drain output
• Micropower operation
• 2.5V to 5.5V operating range
• Chopper stabilized design provides
    • Superior temperature stability
    • Minimal switch point drift
    • Enhanced immunity to stress
• Good RF noise immunity
• -40°C to 85°C operating temperature
• ESD＞ 5kV for DFN2020-6, DFN2020-3 and DFN2015H4-3 ESD＞ 6kV for SC59
• Low profile SC59, DFN2020-6, DFN2020-3 and DFN2015H4-3 packages
• “Green” Molding Compound (Note 1)

APPLICATIONs
• Cover switch in clam-shell or slide type cellular phones
• Display switch for portable PCs
• On/Off switch for PDAs and digital cameras
• Contact-less switch in consumer products