AH3762Q HIGH-VOLTAGE, HIGH-SENSITIVITY AUTOMOTIVE HALL EFFECT LATCH Description Pin Assignments The AH3762Q 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 GND 2 of 3.0V to 28V. With chopper stabilized architecture and an internal bandgap regulator to provide temperature compensated supply for 1 V DD internal circuits, the AH3762Q 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 overcurrent 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 (Bop) the output is switched on (pulled low). The output is held latched until magnetic flux density 3. OUTPUT reverses and becomes lower than the release point (Brp). 2. GND 1. V DD The magnetic operating and release polarity is opposite for SOT23 and SC59 packages. SOT23 and SIP-3 (Ammo Pack), SIP-3 (Bulk SIP-3 (Ammo Pack), SIP-3 (Bulk Pack) Pack) packages will require south pole to the part marking side to operate while SC59 will require south pole to the non part-marking side. Features Applications Brushless DC-Motor Commutation Bipolar Latch Operation (South Pole: On, North Pole: Off) Revolution Per Minute (RPM) Measurement High Sensitivity: Bop and Brp of +25G and -25G Typical Angular and Linear Encoder and Position Sensing and Indexing Single Open-Drain Output with Overcurrent Limit Flow Meters 3.0V to 28V Operating Voltage Range Contactless Commutation, Speed Measurement and Angular Chopper Stabilized Design Provides Position Sensing/Indexing in Automotive Applications Superior Temperature Stability 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 (Ammo Pack), SIP-3 (Bulk Pack) Packages Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) The AH3762Q is suitable for automotive applications requiring specific change control this part is AEC-Q100 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities. Low-Pass Filter Sample and Hold Dynamic Offset Cancellation AH3762Q Typical Applications Circuit (Note 4) 3.0V to 28V V DD R L OUTPUT AH3762Q C IN GND Note: 4. C is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 10nF to 100nF. R is the pull-up resistor. IN L Pin Descriptions Package: SC59, SOT23 and SIP-3 (Ammo Pack), SIP-3 (Bulk Pack) Pin Number Pin Name Function 1 Power Supply Input VDD 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 AH3762Q February 2020 Diodes Incorporated www.diodes.com Document number: DS38071 Rev. 4 - 2 PRELIMINARY - CONFIDENTIAL