AH1808 HIGH SENSITIVITY MICROPOWER OMNIPOLAR HALL-EFFECT SWITCH Description Pin Assignments The AH1808 is a high-sensitivity, micropower Omnipolar Hall Effect switch IC. It is designed for portable and battery powered consumer TOP View) equipment, home appliances and industrial equipment such as smart- meter magnetic-tamper detection. Based on two sensitive Hall effect plates and a chopper stabilized architecture, the AH1808 provides a reliable solution over the whole operating range. To support portable and battery powered equipment, the design is optimized to operate over the supply range of 2.5V to 5.5V and consumes only 24W with a supply of 3V. SC59 The single open drain output can be switched on with either a North or South pole of sufficient strength. When the magnetic flux density (TOP View) (B) perpendicular to the package 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. Features SOT553 Omnipolar (North or South pole) Operation High Sensitivity Single Open Drain Output Micropower Operation 2.5V to 5.5V Operating Range Chopper Stabilized Design Provides SIP-3 Superior Temperature Stability Minimal Switch Point Drift Enhanced Immunity to Stress Applications Good RF Noise Immunity -40C to +85C Operating Temperature Doors, Lids, Covers and Trays Position Detect Switches ESD (HBM) > 6KV Display Switch for Portable PCs and Tablets Small Low Profile SOT553 and Industry Standard SC59 and SIP-3 On/Off Switch for PDAs and Digital Cameras Packages Liquid Level Detection for Coffee Machines Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Smart Meters Halogen and Antimony Free. Green Device (Note 3) Position, Proximity and Level Detection Contact-Less Switch in Battery Powered Consumer, Home Appliances and Industrial Applications Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See AH1808 Typical Applications Circuit Note: 4. C is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 10nF to 100nF. IN R is the pull-up resistor, the recommended resistance is 10k to 100k. L Pin Descriptions Package: SC59 and SIP-3 Pin Pin Function Number Name 1 Power Supply Input V DD 2 GND Ground 3 OUTPUT Output Package: SOT553 Pin Pin Function Number Name 1 NC No Connection (Note 5) 2 GND Ground 3 NC No Connection (Note 5) 4 V Power Supply Input DD 5 OUTPUT Output Note: 5. NC is No Connection pin and is not connected internally. This pin can be left open or tied to ground. Functional Block Diagram 2 of 12 February 2015 AH1808 Diodes Incorporated www.diodes.com Document number: DS35655 Rev. 6 - 2