AH180
MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR
SWITCH
Description
Pin Assignments
AH180 is
a
micro-power Omnipolar Hall-Effect switch
(Top View)
designed for portable and battery powered equipment such
cellular phones, PDAs and portable PCs. Based on two Hall-
Effect plates and a chopper stabilized architecture the AH180
provides a reliable solution over the whole operating range.
To support portable and battery powered equipment the
design has been optimized to operate over the supply range
of 2.5V to 5.5V and consumes only 24uW with a supply of 3V.
3.
Output
2. GND
Vdd
1.
(SIP-3L)
(Top View)
The single open-drain output switches on with either a north
or south pole of sufficient strength.
3.
Output
GND 2.
1 . Vdd
When the magnetic flux density (B) is larger than operate
point (Bop), output is switched on (Output pin is pulled low).
The output is turned off when B becomes lower than the
release point (Brp). The output will remain off when there is
no magnetic field.
SC59
( Top View )
(Top View)
5. GND
6. NC
4. NC
3. GND
The AH180 is available in SIP-3L, SC59, DFN2020-3, and
DFN2020-6 packages.
Features
1. Vdd
2. NC 3. Output
DFN2020-6
•
•
•
•
•
Omnipolar (north or south pole) operation
Micropower operation
Single open drain output
2.5V to 5.5V operating voltage
Chopper stabilized design provides
1. Vdd
3. Output
DFN2020-3
Applications
•
•
•
Superior temperature stability
Minimal switch-point drift
Enhanced immunity to stress
•
•
•
Cover switch in clam-shell cellular phones
Cover switch in Notebook PC/PDA
Contact-less switch in consumer products
•
•
•
Good RF noise immunity
-40°C to 85°C operating temperature
ESD (HBM) > 5KV for DFN2020-6, DFN2020-3
> 6KV for SIP-3L and SC59
•
•
SIP-3L, SC59 (commonly known as SOT23 in Asia)
DFN2020-6, DFN2020-3 packages
Green Molding Compound (No Br, Sb) (Note 1)
Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html.
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www.diodes.com
July 2010
© Diodes Incorporated
AH180
Document number: DS31023 Rev. 17 - 2