Diodes AH1885 User Manual
Ah1885
AH1885
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
AH1885
Document number: DS31235 Rev. 4 - 2
1 of 7
September 2010
© Diodes Incorporated
Description
AH1885 is with two Hall effect plates and dual CMOS
output driver, mainly designed for battery–powered, 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
output1 on. The output1 will be turned off under no
magnetic field.
While the magnetic flux density (B) is larger than operate
point (Bop), the output1 will be turned on (low), the output1
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
°C to 85°C operating temperature
• ESD
＞ 4KV in human body mode
• Package:
SOT553
• “Green” Molding Compound
Applications
• Cellular
phone
• PDA
• Cordless
phone
Typical Application Circuit
AH1885
Vdd
Output 1
GND
Output 2
(Complement
of Output 1)