AH1883 MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH Description Pin Assignments (Top View) The AH1883 micropower Omnipolar Hall Effect switch IC is designed for portable and battery powered equipment such NC 1 5 OUTPUT as cellular phones, cordless phones, camcorders, PDAs, and 2 GND portable PCs. Based on two high sensitivity Hall Effect plates and chopper stabilized architecture, the AH1883 provides Vdd NC 4 3 reliable solution over the whole operating range. SOT553 To support portable and battery powered equipment the (Top View) design has been optimized to operate from 1.65V to 3.3V and 3. GND consumes 13uW typical with a supply of 1.8V. To minimize PCB space the AH1883 incudes a push-pull output structure, therefore does not require an external pull up resistor, and is packaged in small low profile SOT553 and U-DFN2020-3 packages. 1. Vdd Either North or South pole of sufficient strength will turn the 2. OUTPUT U-DFN2020-3 output on. When the magnetic flux density (B) is larger than operate (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. Features Applications Micropower operation Cellular phone Operation with North or South Pole PDA 1.65V to 3.3V battery operation Portable PCs Netbook, Notebook, Tablets Chopper stabilized Camcorders o Superior temperature stability Cordless phone o Extremely Low Switch-Point Drift Handheld game consoles o Insensitive to Physical Stress Proximity detection and contact-less switch applications Good RF noise immunity -40C to 85C operating temperature ESD (HBM) 6kV in SOT553 and U-DFN2020-3 Small low profile packages: SOT553 and U-DFN2020-3 Green Molding Compound 1 of 10 September 2011 AH1883 Diodes Incorporated www.diodes.com Document number: DS31296 Rev. 6 - 2 Offset Offset Cancellation Cancellation AH1883 MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH Typical Application Circuit Vdd Output AH1883 GND Pin Descriptions Pin Name P/I/O Pin Description NC 1 No Connection GND P/I 2 Ground NC 3 No Connection Vdd P/I 4 Power Supply Voltage Output O 5 Output Pin ( active Low ) Functional Block Diagram Vdd Sleep/Awake Logic and Power Switch Hall Plate Latch Amp Output Driver Output Controller Hall Plate GND Amp Latch 2 of 10 September 2011 AH1883 Diodes Incorporated www.diodes.com Document number: DS31296 Rev. 6 - 2