Diodes AH1887 User Manual
Ah1887
AH1887
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT
SWITCH
AH1887
Document number: DS31313 Rev. 4 - 2
1 of 7
August 2010
© Diodes Incorporated
Description
AH1887 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
output on. The output will be turned off under no magnetic
field.
While the magnetic flux density (B) is larger than operate
point Bop(s), the output1 will be turned on (low), the output is
held until B is lower than release point Brp(s), then turned off
(high).
While the magnetic flux density (B) is larger than operate
point Bop(n), the output2 will be turned on (low), the output is
held until B is lower than release point Brp(n), then turned off
(high).
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
AH1887
Vdd
Output 1
GND
Output 2