AH1887

AH1887 MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH Description Pin Assignments 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). ( Top View ) Out 2 1 5 Out 1 GND 2 NC 3 4 Vdd SOT553 Features Applications 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 Cellular phone PDA Cordless phone Typical Application Circuit Vdd AH1887 Document number: DS31313 Rev. 4 - 2 AH1887 GND Output 1 Output 2 1 of 7 www.diodes.com August 2010 © Diodes Incorporated Pin Descript...