AH1925 ULTRA-LOW POWER DIGITAL OMNIPOLAR HALL EFFECT SWITCH Description Pin Assignments (Top View) The AH1925 is an ultra-low power digital and high sensitivity omnipolar Hall effect switch IC from Diodes Incorporateds broad Hall Effect switches family. The sensitive device is designed to meet a VDD OUTPUT wide range of potential applications with low power requirements including battery-operated equipment, the average supply current is 1 4 only 1.4A at 1.85V. To support portable equipment the AH1925 can operate over the supply range of 1.6V to 3.6V and uses a hibernating clocking system to minimize the power consumption. The high ESD level up to 8kV helps to improve the system robustness. To minimize PCB space the AH1925 is available in small low profile X2-DFN1410- 4 package. The single open-drain output can switch on with either a north or 2 3 south pole of sufficient strength. When the magnetic flux density (B) NC GND perpendicular to the package is larger than operate point (B ) the OP output is switched on (pulled low). The output is turned off when B becomes lower than the release point (B ). RP X2-DFN1410-4 Features Omnipolar Operation (North or South Pole) Supply Voltage of 1.6V to 3.6V Micropower Operation Applications Chopper Stabilized Design Provides: Superior Temperature Stability Smart Cover or Dock Detect for Cellular Phones and Tablet PCs Minimal Switch Point Drift Gas or Water Consumption Measurement in Remote, Battery- Enhanced Immunity to Physical Stress Operated Utility Meters AH1925 is Open-Drain Output Medical Devices, IoT Systems -40C to +85C Operating Temperature Level, Proximity and Position Switches High ESD Capability of 8kV (Human Body Model) E-Locks, Smoke Detectors, Appliances Small Low Profile, X2-DFN1410-4 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 Offset Cancellation AH1925 Typical Applications Circuit (Note 4) 1.6V to 3.6V VDD R L OUTPUT AH1925 C IN GND 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: X2-DFN1410-4 Pin Number Pin Name Function 1 VDD Power Supply Input 2 GND Ground Pin 3 NC No Connection 4 OUTPUT Output Pin Pad Pad The center exposed pad should be tied to the GND or floating No connection internally. Functional Block Diagram VDD 1 Sleep/Awake Logic and Power Switch 4 Hall Latch OUTPUT Plate and Output Amp Driver Controller GND 2 2 of 9 AH1925 September 2019 Diodes Incorporated www.diodes.com Document number: DS42243 Rev. 1 - 2 NEW PRODUCT