Description
The AH1809 is a low sensitivity micropower Omnipolar Hall Effect switch IC. It is designed for battery powered consumer products, home appliances, and industrial equipment such smart e-meters. Based on two Hall Effect plates and a chopper stabilized architecture the AH1809 provides a reliable solution over the whole operating range. To support battery and low power applications 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
• Low 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 +125°C Operating Temperature
• High ESD
• Small Low Profile SOT553 and Industry Standard SC59 and SIP-3L Packages
• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. “Green” Device (Note 3)

Applications
• Smart E-Meters
• Tamper Protection Switch
• Door, Lids and Tray Position Switch
• Proximity and Position Switches
• Level Detects
• On/Off Switch Digital Contact-Less Switch in Industrial and Consumer Products