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AH1802

ULTRA-SENSITIVE OMNIPOLAR HALL-EFFECT SENSOR SWITCH



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AH1802 pdf
AH1802
MICROPOWER, ULTRA-SENSITIVE OMNIPOLAR HALL-EFFECT SENSOR SWITCH
Description
Pin Assignments
The AH1802 is a high sensitivity, micropower 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 AH1802 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 24µW
with a supply of 3V.
(Top View)
The single open drain output can switched on with either a north or
south pole of sufficient strength. When the magnetic flux density (B)
perpendicular the part marking surface 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.
SC59
(Top View)
(Top View)
U-DFN2020-6
(Top View)
Features
Omnipolar (North or South pole) Operation
2.5V to 5.5V operating range
High Sensitivity
Single Open Drain Output
Micropower Operation
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
ESD5kV for U-DFN2020-6, U-DFN2020-3 and X2- DFN2015-3
ESD6kV for SC59
Low Profile SC59, U-DFN2020-6, U-DFN2020-3 and
X2-DFN2015-3 packages
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
U-DFN2020-3
X2-DFN2015-3
Applications
Open and Close Detect for flip/slide Cellular Phones
Smart Cover or Dock Detect for Cellular Phones and Tablets
Cover or Display Switch in Portable PCs (eg Ultrabook)
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/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.
AH1802
Document number: DS31170 Rev. 9 - 2
1 of 12
www.diodes.com
November 2013
© Diodes Incorporated



No Preview Available !

AH1802 pdf
Typical Applications Circuit
2.5~5.5V
C
AH1802
GND
RL
Output
Pin Descriptions
Package: SC59
Pin Number
1
2
3
Pin Name
VDD
OUTPUT
GND
Power Supply Input
Output Pin
Ground Pin
Function
Package: U-DFN2020-3 and X2-DFN2015-3
Pin Number Pin Name
1 VDD Power Supply Input
2 OUTPUT Output Pin
3 GND Ground Pin
Function
Package: U-DFN2020-6 and X2-DFN2015-3
Pin Number Pin Name
1 NC No Connection (Note 4)
2 GND Ground Pin
3 NC No Connection (Note 4)
4 VDD Power Supply Input
5 NC No Connection (Note 4)
6 OUTPUT Output Pin
Function
Note:
4. NC is “No Connection”- recommendation is to connect the NC pin to ground externally.
Functional Block Diagram
AH1802
AH1802
Document number: DS31170 Rev. 9 - 2
2 of 12
www.diodes.com
November 2013
© Diodes Incorporated



Part Number AH1802
Description ULTRA-SENSITIVE OMNIPOLAR HALL-EFFECT SENSOR SWITCH
Maker Diodes - Diodes
Total Page 12 Pages
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