AH1897-FA-7

AH1897 HIGH SENSITIVITY MICROPOWER OMNIPLOAR HALL-EFFECT SWITCH NEW PRODUCT Description Pin Assignments The AH1897 is a high sensitivity micropower Omnipolar Hall effect switch IC with an internal pull up and pull down capability. Designed for portable and battery powered equipment such as cellular phones and portable PCs, the average supply current is only 4.3µA at 1.85V. To support portable equipment, the AH1897 can operate over the supply range of 1.6V to 3.6V and use a hibernating clocking system to minimize the power consumption. To minimize PCB space, the AH1897 is available in a small low profile X1-DFN1216-4 (Type D) package. (Top View) VDD 1 4 OUTPUT GND 2 3 NC X1-DFN1216-4 (Type D) 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 Applications output will be turned 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           Cover or Display Switch in Portable PCs Open and Close Detect for Cellular Phones Holster or Cover Detect for Cellular Phones and Tablet PCs Digital Still, Video Cameras and Handheld Gaming Consoles Contact-Less Switches Omnipolar Operation (North or South Pole) Supply Voltage of 1.6V to 3.6V Micropower Operation Chopper Stabilized Design Provides:  Superior Temperature Stability  Minimal Switch Point Drift  Enhanced Immunity to Physical Stress No External Pull-up Resistors Required Good RF Noise Immunity -40°C to +85°C Operating Temperature Small Low Profile X1-DFN1216-4 (Type D) Package 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) & 2015/863/EU (RoHS 3) compliant. 2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain