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AH180N

MICROPOWER OMNIPOLAR HALL-EFFECT SWITCH


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AH180N pdf
AH180N
MICROPOWER OMNIPOLAR HALL-EFFECT SWITCH
Description
The AH180N is a high sensitivity, micro power Omnipolar Hall Effect
switch IC designed for portable and battery powered equipment such
as cellular phones, PDA’ s and portable PC’ s. Based on two sensitive
Hall Effect plates and a chopper stabilized architecture the AH180N
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 24µA with a supply of 3V.
Pin Assignments
The single open drain output can switched on with either a North or
South pole of sufficient strength. When the magnetic flux density (B)
is larger than operate point (Bop) the output is switched on (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.
Features
Omnipolar (North or South pole) Operation
High Sensitivity
Single Open Drain Output
Micropower Operation
2.5V to 5.5V Operating Range
Chopper Stabilized Design Provides
ƒ Superior Temperature Stability
ƒ Minimal Switch Point Drift
ƒ Enhanced Immunity to Stress
Good RF Noise Immunity
-40°C to +85°C Operating Temperature
ESD (HBM) > 6KV
SC59 (SOT23), TSOT23, and SOT553 Low Profile Packages
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Applications
Cover Switch in Clam-Shell or Slide Type Cellular Phones
Display Switch for Portable PCs
On/Off Switch for PDAs and Digital Cameras
Contact-Less Switch in Consumer Products
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 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.
AH180N
Document number: DS32174 Rev. 4 - 2
1 of 8
www.diodes.com
August 2012
© Diodes Incorporated
Free Datasheet http://www.datasheet4u.com/



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AH180N pdf
Typical Applications Circuit
2.5V to 5.5V
VDD
AH180N
C
AH180N
RL
OUTPUT
GND
Note: C is for power stabilization and to strengthen the noise immunity , the recommended capacitance is 10nF ~ 100nF.
RL is the pull-up resistor, the recommended resistance is 10kOhm ~ 100kOhm.
Pin Descriptions
Pin Name
VDD
GND
Output
P/I/O
P/I
P/I
O
Function
Power Supply Input
Ground
Output Pin
Functional Block Diagram
AH180N
Document number: DS32174 Rev. 4 - 2
2 of 8
www.diodes.com
August 2012
© Diodes Incorporated



Part Number AH180N
Description MICROPOWER OMNIPOLAR HALL-EFFECT SWITCH
Maker Diodes - Diodes
Total Page 8 Pages
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