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AH920 Datasheet

HIGH SENSITIVITY CMOS HALL-EFFECT LATCH

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NOT RECOMMENDED FOR NEW DESIGN
USE AH3772
AH920
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.
Pin Assignments
(Front View)
3
2
1
TO-92S-3
(Top View)
GND
3
OUT
GND
VCC
Features
Wide Operating Voltage Range from 3.5V to 20V
Symmetrical Switch Points
Chopper-Stabilized Amplifier Stage
Superior Temperature Stability
Open-Drain Output
Wide Operating Temperature Range: -40ºC to +125ºC
ESD Rating: 6000V (Human Body Model)
Totally Lead-free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. GreenDevice (Note 3
1
VCC
2
OUT
SOT-23-3
Applications
Brushless DC Motor Commutation
Brushless DC Fan
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 http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
Typical Applications Circuit
VCC1
RL
Output
CL
0.1mF
Output
RL
VCC
VCC2
CL
0.1mF
AH920
Document number: DS36768 Rev. 5 - 3
1 of 14
www.diodes.com
September 2017
© Diodes Incorporated


Diodes Semiconductor Electronic Components Datasheet

AH920 Datasheet

HIGH SENSITIVITY CMOS HALL-EFFECT LATCH

No Preview Available !

Pin Descriptions
Pin Number
TO-92S-3
SOT-23-3
11
23
32
NOT RECOMMENDED FOR NEW DESIGN
USE AH3772
Pin Name
VCC
GND
OUT
Supply voltage
Ground pin
Output Pin
Function
AH920
Functional Block Diagram
VCC
1 (1)
Reference Voltage
Hall Sense
Chopper
Switch
AMP
A (B)
A for TO-92S-3
B for SOT-23-3
2 (3)
GND
OUT
3 (2)
AH920
Document number: DS36768 Rev. 5 - 3
2 of 14
www.diodes.com
September 2017
© Diodes Incorporated


Part Number AH920
Description HIGH SENSITIVITY CMOS HALL-EFFECT LATCH
Maker Diodes
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