AH3574 HIGH VOLTAGE HIGH SENSITIVITY HALL EFFECT OMNIPOLAR SWITCH Description Pin Assignments The AH3574 is a high voltage high sensitivity Hall Effect Omnipolar (TOP View) switch IC designed for proximity, position and level sensing in consumer home appliances, office equipment, smart home to 3 OUTPUT industrial applications. To support wide range of demanding GND 2 applications, the design has been optimized to operate over the supply range of 3.0V to 28V. With chopper stabilized architecture and 1 V DD an internal bandgap regulator to provide temperature compensated supply for internal circuits, the AH3574 provides a reliable solution SOT23 over the whole operating range. For robustness and protection, the device has a reverse blocking diode with a Zener clamp on the supply. The output has an over current limit and a Zener clamp. (TOP View) The single open drain output can be switched on with South or North 3. OUTPUT pole of sufficient strength. When the magnetic flux density (B) 2. GND perpendicular to the package is larger than the operate point (B ) OP V 1. DD the output is switched on (pulled low) and is held on until magnetic flux density B is lower than the release point (B ). RP SIP-3 (Bulk Pack) Features Applications Omnipolar Operation High Sensitivity: B and B of 40G and 25G Typical OP RP Position and Proximity Sensing in Consumer Home Appliances, Single Open Drain Output with Over Current Limit Building Automation, Office Equipments and Industrial Applications 3.0V to 28V Operating Voltage Range Open and Close Detect Chopper Stabilized Design Provides Position Detect Superior Temperature Stability Level Detect Minimal Switch Point Drift Flow Meters Enhanced Immunity to Stress Contact-Less Switches Good RF Noise Immunity Reverse Blocking Diode Zener Clamp on Supply and Output Pins -40C to +125C Operating Temperature ESD: HBM 6kV Industry Standard SOT23 and SIP-3 (Ammo Pack), SIP-3 (Bulk Pack) Packages Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 2. See Low-Pass Filter Sample and Hold Dynamic Offset Cancellation AH3574 Typical Applications Circuit 3.0V to 28V V DD R L OUTPUT AH3574 C IN GND Note: 4. C is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 10nF ~ 100nF. IN R is the pull-up resistor. L Pin Descriptions Package: SOT23 and SIP-3 (Ammo Pack), SIP-3 (Bulk Pack) Pin Number Pin Name Function 1 V Power Supply Input DD 2 GND Ground 3 OUTPUT Output Pin Functional Block Diagram V DD Power Switch To All Subcircuits OUTPUT Amp Amp Control Current Limit GND 2 of 13 AH3574 January 2018 Diodes Incorporated www.diodes.com Document number: DS40413 Rev. 1 - 2 NEW PRODUCT