Diodes AH920 - Manual

AH920
Document number: DS36768 Rev. 2 - 2
1 of 13
www.diodes.com
December 2013
© Diodes Incorporated
AH920
A Product Line of
Diodes Incorporated
HIGH SENSITIVITY CMOS HALL-EFFECT LATCH
Description
The AH920 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 open-drain output.
An on-board regulator permits operation with supply voltage from
3.5V to 20V.
The AH920 is available in TO-92S-3 and SOT-23-3 packages, which
are optimized for most applications.
Features

Wide Operating Voltage Range from 3.5V to 20V
 Symmetrical Switch Points

Chopper-stabilized Amplifier Stage

Superior Temperature Stability

Open-drain Output
 Compact Size

ESD Rating: 6000V (Human Body Model)
Pin Assignments
(Front View)
1
2
3 OUT
GND
VCC
TO-92S-3 (Z3 Package)
(Top View)
3
2 1
OUT
GND
VCC
SOT-23-3 (N Package)
Applications

Brushless DC Motor Commutation
 Brushless DC Fan
 Solid-state Switch

Revolution Counting

Speed Detection
 High Sensitivity and Unconnected Switch
Typical Applications Circuit
A
H
9
2
0
V
C
C
G
N
D
O
U
T
C
L
0.1 m F
R
L
Output
V
CC1
V
CC2
A
H
9
2
0
G
N
D
O
U
T
V
C
C
Output
R
L
C
L
0.1
m
F
V
CC