AH1888-ZG-7 Diodes Incorporated

AH1888 MICROPOWER, GENERAL-SENSITIVE HALL EFFECT SWITCH Description Pin Assignments ( Top View ) The AH1888 micro power Omni-polar Hall Effect switch IC designed for portable and battery powered equipment such Output 2 1 5 Output1 as cellular phones, PDA s and portable PC s. Based on two sensitive Hall Effect plates and chopper stabilized 2 GND architecture the AH1888 provides a reliable solution over the whole operating range. To support portable and battery NC 3 4 Vdd powered equipment the design has been optimized to SOT553 operate over the supply range of 1.65V to 3.3V and consumes only 12.6W with a supply of 1.8V. (Top View) (Top View) 3. GND 3. GND 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 1. Vdd 2. Output 1 1. Vdd 2. Output 2 AH1888-FJG provides output one and AH1888-FJRG U-DFN2020-3 U-DFN2020R-3 provides output two. Features Applications Omni-polar (north or south pole) operation Cellular phone Single or dual output options Portable PC and PDAs Internal output pull up capability Camcorders Micropower operation Cordless phone 1.65V to 3.3V operating range Contactless switch in consumer products Chopper stabilized design provides Superior temperature stability Minimal switch point drift Enhanced immunity to stress Good RF noise immunity -40C to 85C operating temperature ESD (HBM)4KV for SOT553 ESD (HBM)5KV for U-DFN2020-3 and U-DFN2020R-3 Package: SOT553, U-DFN2020-3 and U-DFN2020R-3 Halogen and Antimony free Green device 1 of 11 February 2012 AH1888 Diodes Incorporated www.diodes.com Document number: DS31565 Rev. 8 - 2 AH1888 MICROPOWER, GENERAL-SENSITIVE HALL EFFECT SWITCH Typical Application Circuit (1) SOT553 (2) U-DFN2020-3 (3) U-DFN2020R-3 Vdd Vdd Vdd Output 1 Output 1 Output 2 AH1888 AH1888 AH1888 Output 2 GND GND GND Pin Descriptions Pin Name P/I/O Description Vdd P/I Power Supply Voltage GND P/I Ground Output 1 O Output Pin ( Active Low ) Output 2 O Output Pin ( Active High ) 2 of 11 February 2012 AH1888 Diodes Incorporated www.diodes.com Document number: DS31565 Rev. 8 - 2