Description
The AH1802 is a high-sensitivity, micropower, omnipolar Hall Effect switch integrated circuit (IC) designed for portable and battery-powered equipment, such as cellular phones, PDAs, and portable PCs. 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 24µW with a supply of 3V.

Features
● Omnipolar (North or South Pole) Operation
● 2.5V to 5.5V Operating Range
● High Sensitivity
● Single Open-Drain Output
● Micropower Operation
● 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 U-DFN2020-6, U-DFN2020-3 and X2- DFN2015-3
● ESD > 6kV for SC59
● Low Profile SC59, U-DFN2020-6, U-DFN2020-3 and X2-DFN2015-3 packages
● Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
● Halogen and Antimony Free. “Green” Device (Note 3)

Applications
● Open and Close Detect for Flip/Slide Cellular Phones
● Smart Cover or Dock Detect for Cellular Phones and Tablets
● Cover or Display Switch in Portable PCs (such as Ultrabook™)
● Display Switch for Portable PCs
● On/Off switch for PDAs and Digital Cameras
● Contactless Switch in Consumer Products