Diodes Incorporated AH3714-SA-7

Overview

AH3714-SA-7 from Diodes Incorporated is a high-voltage bipolar Hall-effect latch IC designed for brushless DC motor commutation and position sensing in industrial appliances and personal care devices. It operates from 3.0V to 27V, features ±40G typical operate/release points (BOP/BRP), open-drain output with overcurrent limit (60mA), and chopper-stabilized architecture for stable switching across –40°C to +125°C.

For engineers reviewing the AH3714-SA-7 datasheet, AH3714-SA-7 pinout, AH3714-SA-7 application, or AH3714-SA-7 equivalent, this device supports magnetic position detection requiring precise hysteresis (80G typ), fast startup (13µs), robust load-dump immunity (40V), and reliable latching behavior under thermal stress and ESD (8kV HBM).

Technical Context

The AH3714-SA-7 implements a chopper-stabilized Hall sensor with dynamic offset cancellation, delivering minimal switch-point drift over temperature and supply voltage. Its internal bandgap regulator supplies temperature-compensated bias to analog blocks, enabling stable BOP/BRP thresholds across –40°C to +125°C and 3.0V–27V VDD.

It uses a single-pole latching mechanism: South pole above +40G (typ) pulls OUTPUT low; North pole below –40G (typ) releases it. The open-drain output includes integrated overcurrent limiting (30–60mA) and supports external pullup or internal pullup (AH3714A variant), though AH3714-SA-7 specifies open-drain only per datasheet family designation.

Key Specifications

Pinout & Package

Package: SC59 (Type S) - Industry-standard 3-pin surface-mount package with 0.95mm pitch, optimized for automated placement and thermal performance (230mW at 25°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with AL3714TSA-7, AH3714-SA-7 omits AEC-Q100 documentation but offers identical core performance at lower procurement complexity; versus US1881LUA-AAA-000, it adds 40V transient tolerance and tighter magnetic consistency-critical for motor control stability.

Availability

AH3714-SA-7 is available at Aetrix Electronics and suitable for brushless DC motor commutation, flow meter pulse generation, and linear encoder position sensing requiring stable component supply across industrial appliance, personal care, and office equipment production programs.

Supply support for AH3714-SA-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 industrial, computing, and consumer markets.

AH3714-SA-7 belongs to the AH37xx high-voltage Hall-effect latch family, engineered for robust magnetic sensing in harsh environments where supply variation, temperature extremes, and ESD exposure are routine.

FAQ

What magnetic field strength is required to activate the AH3714-SA-7?

The AH3714-SA-7 activates when perpendicular magnetic flux density exceeds +40G (typical operate point BOP), with a guaranteed range of +20G to +60G across temperature and voltage. It releases when field reverses and falls below –40G (typical BRP), ensuring reliable latching without oscillation due to its 80G typical hysteresis.

Does AH3714-SA-7 include an internal pullup resistor?

No - AH3714-SA-7 is the open-drain-only variant. The AH3714A suffix denotes internal pullup (10–18kΩ); AH3714-SA-7 requires an external pullup resistor. This allows flexible voltage translation (e.g., 3.3V logic with 12V VDD) and avoids leakage issues in high-impedance sensing nodes.

Can AH3714-SA-7 operate directly from a 24V automotive battery?

Yes - it supports 3.0V to 27V continuous operation and withstands 40V transients (load dump), making it suitable for 24V commercial vehicle BLDC systems. However, it is not AEC-Q100 qualified; for automotive safety-critical use, specify AL3714TSA-7 instead.

What is the maximum allowable output sink current?

The AH3714-SA-7 limits output sink current to 30–60mA (IOCL), protecting the internal MOSFET switch during short-circuit or overload events. At 20mA load, output saturation voltage remains ≤0.42V, ensuring clean logic-low levels even with elevated junction temperatures.