AH1822

AH1822 MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR SWITCH Features • • • • Micropower operation Operation with magnetic field of either north or south pole (omnipolar) 2.5V to 5.5V 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 (HBM) ＞ 5KV DFN2015-6 and DFN3020-6: Available in “Green” Molding Compound (No Br, Sb) Lead Free Finish/ RoHS Compliant (Note 1) General Description AH1822 is comprised of two Hall effect plates and an open-drain output driver, mainly designed for battery-operation, hand-held equipment (such as Cellular and Cordless Phone, PDA). The total power consumption in normal operation is typically 24μW with a 3V power source. 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 operating point (Bop), the output will be turned on (low), the output is held until B is lower than release point (Brp), then turned off. • • • • • Applications • • • Cover switch in clam-shell cellular phones Cover switch in Notebook PC/PDA Contact-less switch in consumer products Ordering Information AH 1822 - XXX G - 7 Package FT4 : DFN2015-6 FU4 : DFN3020-6 Green G : Green Packing 7 : Tape & Reel Device AH1822-FT4G-7 AH1822-FU4G-7 Notes: Package Code FT4 FU4 Packaging (Note 2) DFN2015H4-6 DFN3020H4-6 7” Tape and Reel Quantity Part Number Suffix 3000/Tape & Reel -7 3000/Tape & Reel -7 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied, see EU Directive 2002/95/EC Annex Notes. 2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf. AH1822 Rev. 5 1 of 9 www.diodes.com FEBRUARY 2009 © Diodes Incorporated AH1822 MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR SWITCH Pin Assignments ( Top View ) ( Top View ) Output 1 2 3 6 5 4 Vdd NC GND NC Vdd GND 1 2 3 6 5 4 NC Output GND NC GND DFN2015-6 Notes: 3. NC is “No Connection” which is recommended to be tied to ground. DFN3020-6 Pin Descriptions Pin Name Vdd GND Output NC P/I/O P/I P/I O NC Description Power Supply Input Ground Output Pin No Connected Block Diagram Vdd Power switch Offset Cancelling Hall Plate Amp Latch Output Logical GND Offset Cancelling Hall Plate Amp Latch AH1822 Rev. 5 2 of 9 www.diodes.com FEBRUARY 2009 © Diodes Incorporated AH1822 MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR SWITCH Typical Circuit 2.5~5.5V RL C AH1822 GND Output Notes: 4. C is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 10nF~100nF. RL is the pull-up resistor, the recommended resistance is 10KΩ~100KΩ. Absolute Maximum Ratings Symbol Vdd B TST PD TJ (at TA= 25°C) Characteristics Supply voltage Magnetic flux density Storage Temperature Range Package Power Dissipation Maximum Junction Temperature Values 7 Unlimited -65 to +150 230 150 Unit V °C mW °C Recommended Operating Conditions Symbol Vdd TA Parameter Supply Voltage Operating Temperature Range Conditions Operating Operating Rating 2.5~5.5 -40 to +85 Unit V °C AH1822 Rev. 5 3 of 9 www.diodes.com FEBRUARY 2009 © Diodes Incorporated AH1822 MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR SWITCH Electrical Characteristics Symbol Characteristic (TA = +25°C, Vdd = 3V; unless otherwise specified) Conditions Iout=1mA Vout=5.5V, Output off Chip enable , TA= 25°C , Vdd = 3V Chip enable , TA= -40~85°C , Vdd = 2.5~5.5V Chip disable , TA= 25°C , Vdd = 3V Chip disable , TA= -40~85°C , Vdd = 2.5~5.5V Average supply current , TA= 25°C , Vdd = 3V Average supply current , TA= -40~85°C , Vdd = 2.5~5.5V For design information only (Note 5) (Note 5) Min ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ Typ. 0.1