DIODES AH1809-P-A

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. The single open drain output can be switched on with either a North or South pole of sufficient strength. When the magnetic flux density perpendicular to the package (B) is larger than operate point (Bop), the output is switched on (pulled low). The output is turned off when B becomes lower than the release point (Brp). The output will remain off when there is no magnetic field. The AH1809 is available in SC59, SOT553 and SIP- 3L.

• 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
• Halogen and Antimony Free. "Green" Device

• 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