AH1751

NOT RECOMMENDED FOR NEW DESIGN USE AH3774 AH1751 HALL EFFECT LATCH Description AH1751 is a single-digital-output Hall-effect sensor for high temperature operation. The device includes an on-chip Hall voltage generator for magnetic sensing, an amplifier to amplify Hall voltage, and a comparator to provide switching hysteresis for noise rejection, and an open-collector output pre-driver. An internal band-gap regulator is used to provide temperature compensated supply voltage for internal circuits and allows a wide operating supply range. While the magnetic flux density (B) is larger than threshold Bop, the OUT pin turns on (low). If B removed toward Brp, the OUT pin is latched “on” state prior to B < Brp. When B < Brp, the OUT pin go into “off ” state. Features  Bipolar Hall Effect Latch Sensor  3.5V to 20V DC Operation Voltage  Open Collector Pre-Driver  50mA Output Sink Current  Chip Power Reverse-Connection Protection  Operating Temperature: -40°C to 125°C  SIP3, SC59 and SC59R (Commonly known as SOT23 in Asia): Available in “Green” Molding Compound (No Br, Sb)  Totally Lead-free & Fully RoHS Compliant (Note 1 & 2  Halogen and Antimony Free. “Green” Device (Note 3) Pin Assignments ( Top View ) SIP3 3. OUT 2. GND 1. VCC ( Top View ) GND 2. 3. Output 1 . VCC SC59 ( Top View ) GND 2. 3. VCC 1 . Output SC59R Applications  Rotor Position Sensing  Current Switch  Encoder  RPM Detection Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoH...