AH180N-WSG-7 Diodes Incorporated

AH180N MICROPOWER OMNIPOLAR HALL-EFFECT SWITCH Description Pin Assignments The AH180N is a high sensitivity, micro power 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 AH180N 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 24A with a supply of 3V. The single open drain output can switched on with either a North or South pole of sufficient strength. When the magnetic flux density (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. Applications Features Omnipolar (North or South pole) Operation Cover Switch in Clam-Shell or Slide Type Cellular Phones High Sensitivity Display Switch for Portable PCs Single Open Drain Output On/Off Switch for PDAs and Digital Cameras Micropower Operation Contact-Less Switch in Consumer Products 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 -40C to +85C Operating Temperature ESD (HBM) > 6KV SC59 (SOT23), TSOT23, and SOT553 Low Profile Packages Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See Offset Offset Cancelling Cancelling AH180N Typical Applications Circuit 2.5V to 5.5V V DD R L C OUTPUT AH180N GND Note: C is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 10nF ~ 100nF. R is the pull-up resistor, the recommended resistance is 10kOhm ~ 100kOhm. L Pin Descriptions Pin Name P/I/O Function V P/I Power Supply Input DD GND P/I Ground Output O Output Pin Functional Block Diagram 2 of 8 August 2012 AH180N Diodes Incorporated www.diodes.com Document number: DS32174 Rev. 4 - 2