AH1888

PART OBSOLETE – NO ALTERNATE PART AH1888 MICROPOWER, GENERAL-SENSITIVE HALL EFFECT SWITCH Description The AH1888 micro power Omni-polar Hall Effect switch IC designed for portable and battery powered equipment such as cellular phones, PDA’ s and portable PC’ s. Based on two sensitive Hall Effect plates and chopper stabilized architecture the AH1888 provides a reliable solution over the whole operating range. To support portable and battery powered equipment the design has been optimized to operate over the supply range of 1.65V to 3.3V and consumes only 12.6µW with a supply of 1.8V. The outputs are switched with either a north or south pole of sufficient strength. When the magnetic flux density (B) is larger than operate point (Bop) the output is switched on. The output is turned off when B becomes lower than the release point (Brp). The output will remain off when there is no magnetic field. The AH1888-ZG has two outputs, output one pulls low when switched on and output two is inverted. The AH1888-FJG provides output one and AH1888-FJRG provides output two. Pin Assignments ( Top View ) Output 2 1 5 Output1 GND 2 NC 3 (Top View) 3. GND SOT553 4 Vdd (Top View) 3. GND 1. Vdd 2. Output 1 U-DFN2020-3 1. Vdd 2. Output 2 U-DFN2020R-3 Features  Omni-polar (north or south pole) operation  Single or dual output options  Internal output pull up capability  Micropower operation  1.65V to 3.3V operating range  Chopper stabilized design provides  Superior temperature sta...