NOT RECOMMENDED FOR NEW DESIGN USE AH3772 AH920 HIGH SENSITIVITY CMOS HALL-EFFECT LATCH Description Pin Assignments The AH920 is a Hall-effect latch designed in mixed signal CMOS technology. It is quite suitable for use in automotive, industrial and (Front View) consumer applications. 3 OUT Superior high-temperature performance is made possible through 2 GND dynamic offset cancellation, which reduces the residual offset voltage 1 VCC normally caused by device over-molding, temperature dependencies, and thermal stress. The device integrates a voltage regulator, Hall- TO-92S-3 voltage generator, small-signal amplifier, chopper stabilization, schmitt trigger, and open-drain output. (Top View) An on-board regulator permits operation with supply voltage from GND 3.5V to 20V. 3 The AH920 is available in TO-92S-3 and SOT-23-3 packages, which are optimized for most applications. Features 1 2 Wide Operating Voltage Range from 3.5V to 20V VCC OUT Symmetrical Switch Points SOT-23-3 Chopper-Stabilized Amplifier Stage Superior Temperature Stability Open-Drain Output Applications Wide Operating Temperature Range: -40C to +125C ESD Rating: 6000V (Human Body Model) Brushless DC Motor Commutation Totally Lead-free & Fully RoHS Compliant (Notes 1 & 2) Brushless DC Fan Halogen and Antimony Free. Green Device (Note 3 Solid-State Switch Revolution Counting Speed Detection High Sensitivity and Unconnected Switch Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See NOT RECOMMENDED FOR NEW DESIGN USE AH3772 AH920 Pin Descriptions Pin Number Pin Name Function TO-92S-3 SOT-23-3 1 1 VCC Supply voltage 2 3 GND Ground pin 3 2 OUT Output Pin Functional Block Diagram VCC OUT 1 (1) 3 (2) Reference Voltage Chopper AMP Switch Hall Sense 2 (3) GND A (B) A for TO-92S-3 B for SOT-23-3 2 of 14 AH920 September 2017 Diodes Incorporated www.diodes.com Document number: DS36768 Rev. 5 - 3