AH3764Q Q HIGH-VOLTAGE, HIGH-SENSITIVITY AUTOMOTIVE HALL-EFFECT LATCH Description Pin Assignments The AH3764Q is an AEC-Q100 qualified high-voltage, high-sensitivity Hall-Effect latch IC designed for brushless DC-motor commutation, (Top View) speed measurement, angular or linear encoders and position sensors in automotive applications. To support a wide range of demanding applications, the design is optimized to operate over the supply range 3 OUTPUT of 3.0V to 28V. With chopper stabilized architecture and an internal GND 2 bandgap regulator to provide temperature compensated supply for 1 V DD internal circuits, the AH3764Q provides a reliable solution over the whole operating range. For robustness and protection, the device has SC59 and SOT23 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 and switched off with North pole of sufficient strength. When the magnetic flux density (B) perpendicular to the (Top View) package is larger than the operate point (B ) the output is switched op on (pulled low). The output is held latched until magnetic flux density 3. OUTPUT reverses and becomes lower than the release point (B ). rp 2. GND V 1. DD The magnetic operating and release polarity is opposite for SOT23 and SC59 packages. SOT23 and SIP-3 packages will require south SIP-3 pole to the part marking side to operate while SC59 will require south pole to the non-part marking side. Features Applications Bipolar Latch Operation (South Pole: On, North Pole: off) Brushless DC-Motor Commutation High Sensitivity: B and B of +40G and -40G Typical Revolution Per Minute (RPM) Measurement op rp Single Open-Drain Output with Overcurrent Limit Angular and Linear Encoder and Position Sensing and Indexing 3.0V to 28V Operating Voltage Range Flow Meters Chopper Stabilized Design Provides Contactless Commutation, Speed Measurement and Angular Superior Temperature Stability Position Sensing/Indexing in Automotive Applications Minimal Switch Point Drift Enhanced Immunity to Stress Good RF Noise Immunity Reverse Blocking Diode Zener Clamp on Supply and Output Pins -40C to +150C Operating Temperature ESD: HBM 8kV, CDM: >2kV AEC-Q100 Grade 0 Qualified Industry Standard SC59, SOT23 and SIP-3 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 AH3764Q Q Typical Applications Circuit 3.0V to 28V V DD R L OUTPUT AH3764Q C IN GND Note: 4. C is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 10nF ~ 100nF. R is the pull-up resistor. IN L Pin Descriptions Package: SC59, SOT23 and SIP-3 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 AH3764Q July 2015 Diodes Incorporated www.diodes.com Document number: DS38073 Rev. 2 - 2 PRELIMINARY - CONFIDENTIAL