AH1884
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
AH1884
Document number: DS31171 Rev. 6 - 2
1 of 7
www.diodes.com
September 2010
?Diodes Incorporated
Description
AH1884 is with two Hall effect plates and dual CMOS output
driver, mainly designed for batteryoperation, hand-held
equipment (such as Cellular and Cordless Phone, PDA). The
total operation power is down to 15uW in the 1.8V supply.
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 operate
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
5
4
3
2
1
SOT553
GND
Out 1
NC
Out 2
Vdd
( Top View )
Features
" Micropower operation
" Operation with North or South Pole
" 1.65V to 3.3V battery operation
" Chopper stabilized
" Superior temperature stability
" Extremely Low Switch-Point Drift
" Insensitive to Physical Stress
" Good RF noise immunity
" -40癈 to 85癈 operating temperature
" ESD 4KV in human body mode
" Package: SOT553
" Green Molding Compound
Applications
" Cellular phone
" PDA
" Cordless phone
Typical Application Circuit
AH1884
Vdd
Output 1
GND
Output 2
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