AH180

AH180 MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR SWITCH Description AH180 is a micro-power Omnipolar Hall-Effect switch designed for portable and battery powered equipment such cellular phones, PDAs and portable PCs. Based on two HallEffect plates and a chopper stabilized architecture the AH180 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 2.5V to 5.5V and consumes only 24uW with a supply of 3V. The single open-drain output switches on with either a north or south pole of sufficient strength. When the magnetic flux density (B) is larger than operate point (Bop), output is switched on (Output pin is pulled low). 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 AH180 is available in SIP-3L, SC59, DFN2020-3, and DFN2020-6 packages. Pin Assignments (Top View) 3. Output 2. GND 1. Vdd (SIP-3L) (Top View) 3. Output GND 2. SC59 1 . Vdd 6. NC (Top View) 5. GND 4. NC ( Top View ) 3. GND Features • • • • • Omnipolar (north or south pole) operation Micropower operation Single open drain output 2.5V to 5.5V operating voltage Chopper stabilized design provides • Superior temperature stability • Minimal switch-point drift • Enhanced immunity to stress Good RF noise immunity -40°C to 85°C operating temperature ESD (HBM) ＞ 5KV for DFN2020-6, DFN2020-3 ＞ 6KV for SIP-3L and SC59 SIP-3L, SC59 (commonly known as SOT23 in Asia) DFN2020-6, DFN2020-3 packages Green Molding Compound (No Br, Sb) (Note 1) 1. Vdd 2. NC 3. Output 1. Vdd DFN2020-6 3. Output DFN2020-3 Applications • • • Cover switch in clam-shell cellular phones Cover switch in Notebook PC/PDA Contact-less switch in consumer products • • • • • Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html. AH180 Document number: DS31023 Rev. 17 - 2 1 of 13 www.diodes.com July 2010 © Diodes Incorporated AH180 MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR SWITCH Typical Application Circuit 2.5~5.5V RL C AH180 Gnd Output Note: 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 10Kohm~100Kohm. 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 Functional Block Diagram Vdd Power switch Hall Plate Offset Cancelling Amp Latch Output Logical GND Hall Plate Offset Cancelling Amp Latch AH180 Document number: DS31023 Rev. 17 - 2 2 of 13 www.diodes.com July 2010 © Diodes Incorporated AH180 MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR SWITCH Absolute Maximum Ratings (TA = 25°C) Symbol Vdd B Ts PD TJ Characteristics Supply voltage Magnetic flux density Storage Temperature Range SIP-3L Package Power Dissipation SC59-3L/ DFN2020-6/ DFN2020-3 Maximum Junction Temperature Values 7 Unlimited -65 to +150 550 230 150 Unit V °C mW mW °C Recommended Operating Conditions Symbol Vdd TA Parameter Supply Voltage Operating Ambient Temperature Conditions Operating Operating Min 2.5 -40 Max 5.5 85 Unit V °C Electrical Characteristics (TA = 25 °C, Vdd = 3V; unless otherwise specified) Symbol Vout Ioff Idd(en) Idd(en) Idd(dis) Idd(dis) Idd(avg) Idd(avg) Tawake Tperiod D.C. Notes: Characteristic Output On Voltage Output Leakage Current 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 (Note 2) (Note 2) Min ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ Typ. 0.1