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AH921

BCD
Part Number AH921
Manufacturer BCD
Description HIGH SENSITIVITY CMOS HALL-EFFECT LATCH
Published Apr 12, 2015
Detailed Description Data Sheet HIGH SENSITIVITY CMOS HALL-EFFECT LATCH AH921 General Description The AH921 is a Hall-effect latch designe...
Datasheet PDF File AH921 PDF File

AH921
AH921

Overview
Data Sheet HIGH SENSITIVITY CMOS HALL-EFFECT LATCH AH921 General Description The AH921 is a Hall-effect latch designed in mixed signal CMOS technology.
It is quite suitable for use in automotive, industrial and consumer applications.
Superior high-temperature performance is made possible through dynamic offset cancellation, which reduces the residual offset voltage normally caused by device over-molding, temperature dependencies, and thermal stress.
The device integrates a voltage regulator, Hall-voltage generator, small-signal amplifier, chopper stabilization, schmitt trigger, and is directly drivable by the output.
An on-board regulator permits operation with supply voltage from 3.
5V to 24V.
The AH921 is available in TO-92S-3 and SOT-23-3 packages, which are optimized for most applications.
Features • Wide Operating Voltage Range from 3.
5 to 24V • Symmetrical Switch Points • Chopper-stabilized Amplifier Stage • Superior Temperature Stability • Compact Size • Built-in Pull-up Resistor • ESD Rating: 3500V (Human Body Model) Applications • Brushless DC Motor Commutation • Brushless DC Fan • Solid-state Switch • Revolution Counting • Speed Detection • High Sensitivity and Unconnected Switch TO-92S-3 SOT-23-3 Figure 1.
Package Types of AH921 Jul.
2011 Rev.
1.
2 BCD Semiconductor Manufacturing Limited 1 HIGH SENSITIVITY CMOS HALL-EFFECT LATCH Pin Configuration Data Sheet AH921 Z3 Package (TO-92S-3) N Package (SOT-23-3) 3 3 2 12 1 (Front View) (Top View) Figure 2.
Pin Configuration of AH921 Pin Description Pin Number TO-92S-3 SOT-23-3 11 23 32 Pin Name VCC GND OUT Supply voltage Ground pin Output pin Function Jul.
2011 Rev.
1.
2 BCD Semiconductor Manufacturing Limited 2 HIGH SENSITIVITY CMOS HALL-EFFECT LATCH Functional Block Diagram Data Sheet AH921 VCC 1 (1) 100k OUT 3 (2) Reference Voltage Hall Sense Chopper Switch AMP A (B) A for TO-92S-3 B for SOT-23-3 2 (3) GND Figure 3.
Functional Block Diagram of AH921 Ordering Information AH9...


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