AH3372 HIGH VOLTAGE HIGH SENSITIVITY HALL EFFECT UNIPOLAR SWITCH Description Pin Assignments The AH3372 is a high voltage high sensitivity Hall Effect Unipolar switch IC designed for proximity, position and level sensing in (TOP View) industrial and consumer home appliances and personal care applications. To support wide range of demanding applications, the 3 OUTPUT design has been optimized to operate over the supply range of 3.0V GND 2 to 28V. With chopper stabilized architecture and an internal bandgap 1 V DD regulator to provide temperature compensated supply for internal circuits, the AH3372 provides a reliable solution over the whole SC59 and SOT23 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. The single open drain output can be switched on with South pole of sufficient strength. When the magnetic flux density (B) perpendicular (TOP View) to the package is larger than the operate point (B ) the output is OP 3. switched on (pulled low) and is held on until magnetic flux density B is OUTPUT lower than the release point (B ). The output remains switched off for RP 2. GND North pole fields to or no magnetic fields. 1. V DD SIP-3 (Bulk Pack) The magnetic operating and release polarity is opposite for SOT23 and SC59 packages. The SOT23 and SIP-3 (Ammo Pack), SIP-3 (Bulk Pack) packages require south pole to the part marking side to operate while SC59 requires south pole to the non-part marking side. Applications Features Unipolar Operation Position and Proximity Sensing in Consumer Home Appliances, Building Automation, Office Equipments and Industrial Applications High Sensitivity: B and B of +30G and +20G Typical OP RP Open and Close Detect Single Open Drain Output with Over Current Limit 3.0V to 28V Operating Voltage Range Position Detect Level Detect Chopper Stabilized Design Provides Flow Meters o Superior Temperature Stability Contact-less switches o Minimal Switch Point Drift o 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 SC59, 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) compliant. 2. See Low-Pass Filter Sample and Hold Dynamic Offset Cancellation AH3372 Typical Applications Circuit 3.0V to 28V V DD R L OUTPUT AH3372 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: SC59, 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 15 AH3372 July 2016 Diodes Incorporated www.diodes.com Document number: DS38874 Rev. 1 - 2 NEW PRODUCT