AH1802

AH1802 MICROPOWER, ULTRA-SENSITIVE 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 SC59/Low profile DFN2020-6 package ESD (HBM) ＞ 5KV for DFN2020-6 ＞ 6KV for SC59 SC59 (commonly known as SOT23 in Asia) and DFN2020-6: Available in “Green” Molding Compound (No Br, Sb) Lead Free Finish/RoHS Compliant (Note 1) General Description AH1802 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 24 W 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 AH1 802-X X X Package W : SC59 SN : DFN2020-6 Lead Free Packing -7 : Taping G : Green Note: 1. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7. Device AH1802-W AH1802-SN Note: Package Code W SN Packaging (Note 2) SC59 DFN2020-6 7” Tape and Reel Quantity Part Number Suffix 3000/Tape & Reel -7 3000/Tape & Reel -7 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. AH1802 Rev. 2 1 of 7 www.diodes.com JULY 2007 © Diodes Incorporated AH1802 MICROPOWER, ULTRA-SENSITIVE OMNIPOLAR HALL-EFFECT SENSOR SWITCH Pin Assignment (1) SC59 (2) DFN2020-6 ( Top View ) 3. Output GND 2. 1. Vdd 1. Vdd ( Bottom view ) NC 3. Output NC 2. GND Note: 3. NC is “No Connection” which is recommended to be tied to ground. NC Pin Descriptions Name Vdd GND Output P/I/O P/I P/I O Pin # 1 2 3 Description Power Supply Input Ground Output Pin Block Diagram 1 Power switch Offset Cancelling Hall Plate Output Amp Latch Vdd 3 Logical GND 2 Offset Cancelling Hall Plate Amp Latch AH1802 Rev. 2 2 of 7 www.diodes.com JULY 2007 © Diodes Incorporated AH1802 MICROPOWER, ULTRA-SENSITIVE OMNIPOLAR HALL-EFFECT SENSOR SWITCH Typical Circuit 2.5~5.5V RL C AH1802 GND Output Note: 4. C is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 10nF~100nF. Absolute Maximum Ratings Symbol Vdd B TA TS PD TJ (at TA = 25°C) Characteristics Supply voltage Magnetic flux density Operating Temperature Range Storage Temperature Range Package Power Dissipation Maximum Junction Temperature SC59 DFN2020-6 Values 7 Unlimited -40 to +85 -65 to +150 230 150 Unit V °C °C mW °C Recommended Operating Conditions Symbol Vdd Parameter Supply Voltage Operating ( TA = 25°C ) Conditions Rating 2.5~5.5 Unit V AH1802 Rev. 2 3 of 7 www.diodes.com JULY 2007 © Diodes Incorporated AH1802 MICROPOWER, ULTRA-SENSITIVE OMNIPOLAR HALL-EFFECT SENSOR SWITCH Electrical Characteristics Symbol Vout Ioff Idd(en) Idd(dis) Characteristic ( TA = +25°C, Vdd = 3V; unless otherwise specified) Conditions Min - Typ 0.1