AH1822(2018) Ver la hoja de datos (PDF) - Diodes Incorporated.
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AH1822 Datasheet PDF : 8 Pages
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AH1822
MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR SWITCH
Description
AH1822 is comprised of two Hall effect plates and an open-drain
output driver, mainly designed for battery-operation, hand-held
equipment (such as Cellular and Cordless Phone, PDA). The total
power consumption in normal operation is typically 24µW with a 3V
power source.
Either north or south pole of sufficient strength will turn the output on.
The output will be turned off under no magnetic field. While the
magnetic flux density (B) is larger than operating point (Bop), the
output will be turned on (low), the output is held until B is lower than
release point (Brp), then turned off.
Pin Assignments
( Top View )
NC 1
Vdd 2
GND 3
6 NC
5 Output
4 GND
X2-DFN2015-6
Features
Micropower Operation
Operation with Magnetic Field of Either North or South Pole
(Omnipolar)
2.5V to 5.5V Battery Operation
Chopper Stabilized
Superior Temperature Stability
Extremely Low Switch-Point Drift
Insensitive to Physical Stress
Good RF Noise Immunity
-40C to +85C Operating Temperature
ESD (HBM) ＞ 5kV
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Note: 4. NC is “No Connection” which is recommended to be tied to ground.
Applications
Cover Switch in Clam-Shell Cellular Phones
Cover Switch in Notebook PC/PDA
Contact-Less Switch in Consumer Products
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. See https://www.diodes.com/quality/lead-free/ 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
2.5V to 5.5V
C
AH1822
GND
RL
Output
Note: 5. C is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 10nF to 100nF.
RL is the pull-up resistor, the recommended resistance is 10kΩ to 100kΩ.
AH1822
Document number: DS31417 Rev. 6 - 2
1 of 8
www.diodes.com
December 2018
© Diodes Incorporated
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