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Unipolar Hall-Effect Digital Switch 1 V1.10 May 1, 2011 F e a t u r e s a n d B e n e f i t s – 4.5V to 24V Operation – -40℃ to 150℃ Superior temperature operation – Bipolar technology – Open-collector 25 mA output – Reverse battery protection – Small Size-SOT23 3L or SIP 3L – Solid-state reliability – Resistant to physical stress – Activate with small, commercially available Permanent magnets 3 p i n S O T 2 3 ( s u f f i x S O ) 3 p i n S I P ( s u f f i x U A ) VDD OUT Voltage Regulatr Chopper Hall Plate GND Application Examples  Automotive, Consumer and Industrial  Solid-state switch  Brushless DC motor commutation  Speed detection  Linear position detection  Angular position detection  Proximity detection Functional Block Diagram Pin 1 – VDD Pin 1 – VDD Pin 2 – GND Pin 2 – OUT Pin 3 – OUT Pin 3 – GND

Unipolar Hall-Effect Digital Switch 2 V1.10 May 1, 2011 General Descriptions The A1103 is a unipolar Hall-eff ect sensor IC fabricated from bipolar technology. The device integrates a voltage regulator, reverse battery protection diode, Hall sensor with dynamic offset cancellation system, temperature compensation circuitry, small signal amplifier, Schmitt trigger and an open-collector output to sink up to 25 mA. With suitable output pull up, they can be used with bipolar or CMOS logic circuits. These Hall-effect switches are monolithic integrated circuits with tighter magnetic specific ations, designed to operate continuously over extended temperatures to +150 ℃,and are more stable with both temp erature and supply voltage changes. The unipolar switching characteristic makes these devices ideal for use with a simple bar or rod magnet. Thanks to its wide operating voltage range and extended choice of temperature range, it is quite suitable for use in automotive, industrial and consumer applications. The device is delivered in a Small Outline Transistor (SOT) or in a Plastic Single In Line (SIP 3L flat). Both 3-lead packages are RoHS compliant. Glossary of Terms MilliTesla (mT), Gauss Units of ma gnetic flux density: 1mT = 10 Gauss RoHS Restriction of Hazardous Substances Operating Point (BOP) Magnetic flux density applied on the bran ded side of the package which turns the output d r i v e r O N ( V OUT = VDSon) Release Point (BRP) Magnetic flux density applied on the branded side of the package which turns the output d r i v e r O F F ( V OUT = high)

Unipolar Hall-Effect Digital Switch 3 V1.10 May 1, 2011 Pin Definitions and Descriptions SOT Pin № SIP Pin № Name Type Function 1 1 VDD Supply Supply Voltage pin 2 3 OUT Output Open Drain Output pin 3 2 GND Ground Ground pin Absolute Maximum Ratings Parameter Symbol V a l u e U n i t s Supply Voltage VDD 28 V Supply Current IDD 50 mA Output Voltage VOUT 28 V Output Current IOUT 50 mA Storage Temperature Range TS -65 to 170 °C Absolute maximum ratings Operating Temperature Range Symbol Value U n i t s Temperature Suffix “E” TA -40 to 85 °C Temperature Suffix “K” TA -40 to 12 5 °C Temperature Suffix “L” TA -40 to 150 °C Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute-maximum- rated conditions for extended periods may affect device reliability

Unipolar Hall-Effect Digital Switch 4 V1.10 May 1, 2011 General Electrical Specifications DC Operating Parameters TA = 25 ℃, VDD= 4.5V to 24V (unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max U n i t s Supply Voltage VDD Operating 4.5 24 V Supply Current IDD B < BRP 4 5 7 mA Output Saturation Voltage VDSon IOUT = 20mA, B > BOP 0.3 0.5 V Output Leakage Current IOFF B < BRP VOUT = 24V 0.1 10 µA Output Rise Time tr RL = 820Ω, C L = 20pF 0.04 2.0 µs Output Fall Time tf RL =820Ω, C L = 20pF 0.18 2.0 µs Magnetic Specifications DC Operating Parameters VDD = 4.5V to 24V (unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Units Operating Point B OP 150 170 190 G Release Point BRP 100 125 160 G Hysteresis BHYS Ta=25℃,Vdd=12V DC 45 G

Application Information

Unipolar Hall-Effect Digital Switch 5 V1.10 May 1, 2011

Package Information

Package UA, 3-Pin SIP:

Unipolar Hall-Effect Digital Switch 6 V1.10 May 1, 2011 Package LH, 3-Pin SOT-23：

Ordering Information

Part No. Pb-free Temperature Code Package Code Packing A1103ESOT YES -40°C to 85°C SOT-23 7-in. reel, 3000 pieces/reel A1103EUA YES -40°C to 85°C TO-92 Bulk, 1000 pieces/bag A1103KSOT YES -40°C to 125°C SOT-23 7-in. reel, 3000 pieces/reel A1103KUA YES -40°C to 125°C TO-92 Bulk, 1000 pieces/bag A1103LSOT YES -40°C to 150°C SOT-23 7-in. reel, 3000 pieces/reel A1103LUA YES -40°C to 150°C TO-92 Bulk, 1000 pieces/bag