AH3572 HIGH VOLTAGE HIGH SENSITIVITY HALL EFFECT OMNIPOLAR SWITCH Description Pin Assignments The AH3572 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 1 V DD supply range of 3.0V to 28V. With chopper stabilized architecture and an internal bandgap regulator to provide temperature compensated SOT23 supply for internal circuits, the AH3572 provides a reliable solution over the whole operating range. For robustness and protection, the device has a reverse blocking diode with a Zener clamp on the (Front View) supply. The output has an over current limit and a Zener clamp... 3. OUTPUT The single open drain output can be switched on with South or North 2. GND pole of sufficient strength. When the magnetic flux density (B) 1. V DD perpendicular to the package is larger than the operate point (B ) the OP output is switched on (pulled low) and is held on until magnetic flux SIP-3 (Bulk Pack) density B is lower than the release point (B ). RP Applications Features Position and Proximity Sensing in Consumer Home Appliances, Omnipolar Operation Building Automation, Office Equipments and Industrial Applications High Sensitivity: B and B of 20G and 10G Typical OP RP Open and Close Detect Single Open Drain Output with Over Current Limit Position Detect 3.0V to 28V Operating Voltage Range Level Detect Chopper Stabilized Design Provides Flow Meters Superior Temperature Stability Contact-Less Switches Minimal Switch Point Drift Enhanced Immunity to Stress 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 AH3572 Typical Applications Circuit 3.0V to 28V V DD R L OUTPUT AH3572 C IN GND Note: 4. C is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 10nF to 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 14 AH3572 February 2018 Diodes Incorporated www.diodes.com Document number: DS40412 Rev. 1 - 2 NEW PRODUCT