Diodes Incorporated AH3965Q-WT-7

Overview

AH3965Q-WT-7 from Diodes Incorporated is an AEC-Q100 Grade 0 qualified dual Hall-effect latch IC for automotive speed and direction sensing, featuring open-drain SP (speed) and DIR (direction) outputs, 2.7V–27V supply range, -40°C to +150°C operation, and chopper-stabilized architecture for minimal switch-point drift in power closure anti-pinch systems.

For engineers reviewing the AH3965Q-WT-7 datasheet, AH3965Q-WT-7 pinout, AH3965Q-WT-7 application, or AH3965Q-WT-7 equivalent, key selection criteria include magnetic operating/release points (±10 G / ±30 G), UVLO threshold (2.35 V), output saturation voltage (0.2 V @ 10 mA), 60 kHz max switching frequency, and TSOT25 package compatibility with high-temperature motor control PCB layouts.

Technical Context

The device integrates two independent Hall plates (H1/H2) with offset cancellation and chopper stabilization to deliver robust differential magnetic sensing. Its dual-latch logic decodes rotational direction via DIR output polarity while SP provides synchronized speed pulses - both referenced to a temperature-compensated internal bandgap regulator.

Protection architecture includes reverse-voltage blocking diode, 36 V Zener clamp on VDD, undervoltage lockout (UVLO) freezing output state during brownout, and HBM 5 kV/CDM 2 kV ESD hardening - all validated across -40°C to +150°C ambient for under-hood automotive deployment.

Key Specifications

Pinout & Package

TSOT25 (Type A1) 5-pin ultra-thin surface-mount package with exposed thermal pad (not electrically connected), 0.95 mm pitch, 2.9 mm × 2.8 mm footprint, and 0.75 mm height - optimized for space-constrained automotive sensor modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual Hall latch applications.

Compared with AL3965QWT-7 and TLE4961-2K, AH3965Q-WT-7 delivers superior magnetic matching (±5 G), lower quiescent current (4.7 mA), and built-in Zener clamping - making it optimal for compact, self-protected anti-pinch actuators requiring ASIL-B compliance.

Availability

AH3965Q-WT-7 is available at Aetrix Electronics and suitable for automotive power closures, transmission speed sensing, linear position tracking, and rotary knob interfaces requiring stable component supply across extended temperature and voltage ranges.

Supply support for AH3965Q-WT-7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and consumer markets, with IATF16949-certified manufacturing facilities.

The AH3965Q-WT-7 belongs to Diodes' AEC-Q100 qualified Hall-effect sensor product line, engineered specifically for robust magnetic position and motion sensing in harsh automotive environments - emphasizing accuracy, reliability, and system-level integration simplicity.

FAQ

What is the magnetic field polarity convention for DIR output logic?

The DIR output is high (open-drain pulled up) when the south pole approaches the branded side of the TSOT25 package (clockwise rotation), and low when the north pole approaches (counter-clockwise). This mapping is fixed per the datasheet timing diagram and does not depend on external configuration.

Can AH3965Q-WT-7 operate reliably at 27 V supply with continuous 150°C ambient?

Yes - the device is rated for 27 V supply and -40°C to +150°C ambient operation per AEC-Q100 Grade 0. At 27 V and 150°C, supply current remains within 7 mA limit and output saturation voltage stays ≤0.5 V at 10 mA load, ensuring functional integrity without derating.

Is the TSOT25 (Type A1) package RoHS and halogen-free compliant?

Yes - AH3965Q-WT-7 is fully RoHS 3 compliant (2015/863/EU) and halogen-free, containing <900 ppm bromine, <900 ppm chlorine, and <1000 ppm antimony, meeting Diodes Incorporated's "Green" product definition per datasheet Note 3.

Does AH3965Q-WT-7 require external capacitors for stable operation?

A 10 nF ceramic capacitor between VDD and GND is recommended per the typical application circuit in DS43742 Rev. 2. This stabilizes the internal bandgap regulator and suppresses supply noise coupling into Hall plates - omission may increase output jitter beyond ±5 µs specification.