Diodes AH920 User Manual
Ah920, Description, Features
AH920
Document number: DS36768 Rev. 2 - 2
1 of 13
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