AH9251-W-7 Diodes Incorporated

AH9251 MEDIUM SENSITIVITY MICROPOWER OMNIPOLAR HALL-EFFECT SWITCH Description Pin Assignments The AH9251 is a medium sensitivity Hall-effect switch with internal pull-up resistor on the output, designed for battery operated handheld (Front View) equipments to industrial applications. A chopper stabilized architecture improves stability of magnetic switch 3 OUTPUT points over the whole operating range. A sleep-awake logic controls the sleep and awake time to reduce the average operating current of 2 GND the device. During the awake time, the output is changed with the magnetic flux density. During the sleep time, the output is latched in 1 V DD its previous state and the current consumption reduces to 4A typical at 3V. The average current consumption is 8A at 3V. TO92S The output can be switched on with either north or south pole of sufficient strength. If the magnetic flux density perpendicular to the part marking surface is larger than operating point (B ), the output OP (Top View) will be turned on if it is less than releasing point (B ), the output will RP be turned off. GND The AH9251 is available in industry standard TO92S and SC59 3 packages. Features 1 2 Omnipolar Operation (Switching with North or South Poles) V DD OUTPUT 2.5V to 5.5V Power Supply Micropower Operation SC59 Built in Pull-up Resistor on the Output Stabilized Chopper Superior Temperature Stability Digital Output Signal Applications -40C to +85C Operating Temperature ESD (HBM): 5000V Handheld Wireless Applications Proximity Detection Switches Small Low Profile Industry Standard SC59 and TO92S Packages Doors, Lids, Covers and Tray Position Detect Switches Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Liquid Level Detection Halogen and Antimony Free. Green Device (Note 3) Battery Powered Consumer, Home Appliances and Industrial Applications Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See AH9251 Typical Applications Circuit 2 1 OUTPUT V DD 2.5V to 5.5V 10nF AH9251 100pF GND 3 Pin Descriptions Pin Number Pin Name Function TO92S SC59 1 1 V Power supply pin DD 2 3 GND Ground pin 3 2 OUTPUT Output pin Functional Block Diagram V DD 1(1) Sleep/Awake Timing Bias Control Logic 100k 3(2) + Hall OUTPUT Plate - Chopper Comparator 2(3) GND A (B) A for TO92S B for SC59 2 of 10 AH9251 September 2015 Diodes Incorporated www.diodes.com Document number: DS38218 Rev.1 - 2 NEW PRODUCT