ULTRA-SENSITIVE HALL EFFECT SWITCH
OBSOLETE – PART DISCONTINUED
PART OBSOLETE – NO ALTERNATE PART
AH1885
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH
...
Description
OBSOLETE – PART DISCONTINUED
PART OBSOLETE – NO ALTERNATE PART
AH1885
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH
Description
Pin Assignments
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.
( Top View )
Out 2 1
5 Out 1
GND 2
NC 3
SOT553
4 Vdd
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 -40C to 85C operating temperature ESD > 4KV in human body mode Package: SOT553 “Green” Molding Compound
Applications
Cellular phone PDA Cordless phone
Typical Application Circuit
Vdd
AH1885
Document number: DS31235 Rev. 5 - 4
AH1885 GND
Output 1
Output 2 (Complement of Output 1)
1 of 7 www.diodes.com
April 2019
© Diodes Incorporated
OBSOLETE – PART DISCONTINUED
Pin Descriptions
PART OBSOLETE – NO ALTERNATE PART
AH1885
MICROPOWER, ULTRA-SENSITIVE HALL EFF...
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