AH1895-FA-7

AH1895 MEDIUM SENSITIVITY MICROPOWER OMNIPLOAR HALL-EFFECT SWITCH Description Pin Assignments The AH1895 is a medium sensitivity micropower Omnipolar Hall effect (Top View) switch IC with internal pull up and pull down capability. Designed for portable and battery powered equipment such as cellular phones and portable PCs to home appliances and industrial applications, the average supply current is only 4.3uA at 1.85V. To support portable equipment the AH1895 can operate over the supply range of 1.6V to X1-DFN1216-4 3.6V and uses a hibernating clocking system to minimize the power consumption. To minimize PCB space the AH1895 is available in (Top View) small low profile X1-DFN1216-4 and SOT553 packages. The output is activated with either a north or south pole of sufficient magnetic field strength. When the magnetic flux density (B) perpendicular to the package is larger than operate point (Bop), the output will be turned on (pulled low) and held until B is lower than SOT553 release point (Brp). The output will remain off when there is no magnetic field. Features Applications Omnipolar Operation (North or South pole) Open and Close Detect for Cellular Phones Supply Voltage of 1.6V to 3.6V Holster or cover detect for cellular phones and Tablet PCs Medium Sensitivity Cover or Display Switches in Portable PCs Micropower Operation Digital Still, Video Cameras and Handheld Gaming Consoles Chopper Stabilized Design Provides: Door, Lids and Tray Position Switches Superior Temperature Stability Level, Proximity and Position Switches Minimal Switch Point Drift Contact-Less Switches in Home Appliances and Industrial Enhanced Immunity to Physical Stress Applications No External Pull-up Resistors Required Good RF Noise Immunity -40C to +85C Operating Temperature High ESD capability of 8kV (Human Body Model) Small Low Profile X1-DFN1216-4 and SOT553 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 AH1895 Pin Descriptions Package: X1-DFN1216-4 Pin Number Pin Name Function 1 OUTPUT Output Pin 2 Power Supply Input V DD 3 NC No Connection (Note 5) 4 GND Ground Pin Package: SOT553 Pin Number Pin Name Function 1 Power Supply Input V DD 2 NC No Connection (Note 5) 3 NC No Connection (Note 5) 4 GND Ground 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 10 July 2013 AH1895 Diodes Incorporated www.diodes.com Document number: DS35742 Rev. 1 - 2 NEW PRODUCT