AH1911/AH1921 ULTRA-LOW POWER DIGITAL OMNIPLOAR HALL-EFFECT SWITCH Description Pin Assignments The AH1911/AH1921 is an ultra-low power digital Omnipolar Hall (Top View) Effect switch IC from Diodes broad Hall Effect switches family. Thanks to the hibernating clocking system, the average supply current is only 1.6A at 3V, which makes the AH1911/AH1921 2 OUTPUT perfectly fit battery-powered consumer products, Gas or water meter, GND 3 smoke detectors and IoT devices. The wider range of supply voltage 1 VDD (1.6V to 5.5V) extends battery operating time and supports low voltage system microcontrollers, which provides great flexibility for system design. The advanced chopper stabilized design provides SC59 superior stability on switch operating point over temperature and supply voltage. The high ESD level up to 6kV helps to improve the system robustness. The single push-pull for AH1911 or open drain for AH1921 output can be switched on with either South or North pole of sufficient strength. When the magnetic flux density (B) perpendicular to the package is larger than operate point (B ), the output will be turned on (pulled OP low) and held until B is lower than release point (B ). RP The AH1911/AH1921 comes with industry standard SC59 package. Features Applications Omnipolar Operation (North or South Pole) Smart Cover or Dock Detect for Cellular Phones and Tablet PCs Supply Voltage of 1.6V to 5.5V Gas or Water Consumption Measurement in Remote, Battery- Micropower Operation Operated Utility Meters Chopper Stabilized Design Provides: Medical Devices, IoT Systems Superior Temperature Stability Level, Proximity and Position Switches Minimal Switch Point Drift E-Locks, Smoke Detectors, Appliances Enhanced Immunity to Physical Stress AH1911 is Push-Pull Output and AH1921 is Open Drain Output -40C to +85C Operating Temperature High ESD Capability of 6kV (Human Body Model) Small Low Profile, SC59 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 AH1911/AH1921 Pin Descriptions Package: SC59 Pin Number Pin Name Function 1 VDD Power Supply Input 2 OUTPUT Output Pin 3 GND Ground Pin Functional Block Diagram VDD 1 2 OUTPUT AH1921 Sleep/Awake Logic and Power Switch GND 3 VDD Hall Latch Plate and Output Amp OUTPUT Driver AH1911 2 Controller GND 3 Absolute Maximum Ratings (Note 5) ( T = +25C, unless otherwise specified.) A Symbol Parameter Rating Unit Supply Voltage (Note 6) 6 V V DD V Reverse Supply Voltage -0.3 V DD REV I Output Current (Source and Sink) 1 mA OUTPUT B Magnetic Flux Density Unlimited P Package Power Dissipation SC59 230 mW D Ts Storage Temperature Range -65 to +150 C T Maximum Junction Temperature +150 C J ESD HBM Human Body Model (HBM) ESD Capability 6 kV Notes: 5. Stresses greater than the Absolute Maximum Ratings specified above may cause permanent damage to the device. These are stress ratings only functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be affected by exposure to absolute maximum rating conditions for extended periods of time. 6. The absolute maximum V of 6V is a transient stress rating and is not meant as a functional operating condition. It is not recommended to DD operate the device at the absolute maximum rated conditions for any period of time. 2 of 9 AH1911/AH1921 September 2018 Diodes Incorporated www.diodes.com Document number: DS41109 Rev. 1 - 2 NEW PRODUCT