Diodes AH180 - Manual

AH180
MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR
SWITCH
AH180
Document number: DS31023 Rev. 17 - 2
1 of 13
www.diodes.com
July 2010
© Diodes Incorporated
Description
AH180 is a micro-power Omnipolar Hall-Effect switch
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.
The single open-drain output switches on with either a north
or south pole of sufficient strength.
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.
The AH180 is available in SIP-3L, SC59, DFN2020-3, and
DFN2020-6 packages.
Features
• Omnipolar (north or south pole) operation
• Micropower
operation
• Single open drain output
• 2.5V to 5.5V operating voltage
• Chopper stabilized design provides
• Superior temperature stability
• Minimal switch-point drift
• Enhanced immunity to stress
• 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)
Pin Assignments
(Top View)
1. Vdd
2. GND
3. Output
(SIP-3L)
1 . Vdd
3.
GND 2.
Output
(Top View)
SC59
1. Vdd 2. NC 3. Output
4. NC 6. NC 5. GND
(Top View)
DFN2020-6
1. Vdd 3. Output
3. GND
( Top View )
DFN2020-3
Applications
• Cover switch in clam-shell cellular phones
• Cover switch in Notebook PC/PDA
• Contact-less switch in consumer products
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.