Diodes Incorporated AH3714-P-B

Overview

AH3714-P-B 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), delivers open-drain output with 60mA current limit, and maintains stable switching across –40°C to +125°C.

For engineers reviewing the AH3714-P-B datasheet, AH3714-P-B pinout, AH3714-P-B application, or AH3714-P-B equivalent, this device supports magnetic position detection in high-temperature, high-voltage environments where chopper-stabilized immunity to thermal drift and mechanical stress is required.

Technical Context

The AH3714-P-B uses chopper-stabilized architecture with dynamic offset cancellation to suppress thermal and mechanical drift, enabling consistent BOP/BRP thresholds over temperature and supply voltage. Its internal bandgap regulator supplies temperature-compensated bias to analog blocks, ensuring <±10G variation in hysteresis across –40°C to +125°C.

It implements a latched output logic: South pole exposure switches output low (≤0.42V at 20mA), and North pole exposure releases it-holding state until magnetic reversal crosses BRP. Startup time is 13µs after VDD reaches 3V, and chopping frequency is fixed at 500kHz.

Key Specifications

Pinout & Package

Available in SC59, SOT23 (Type S), and SIP-3 (Bulk Pack) packages. AH3714-P-B uses the industry-standard 3-pin SOT23 (Type S) configuration.

Key Features

Applications

Equivalent & Alternatives

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

Compared with A1120EUA-T and US1881EUA-ABA-002-SP, AH3714-P-B uniquely combines 27V operation, 40V transient tolerance, and factory-trimmed ±40G/±60G thresholds-making it optimal for unregulated 24V appliance subsystems demanding long-term magnetic stability.

Availability

AH3714-P-B is available at Aetrix Electronics and suitable for brushless DC motor commutation, flow metering, and linear position indexing requiring stable component supply across industrial temperature ranges and high-voltage transients.

Supply support for AH3714-P-B 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-P-B belongs to the AH37xx high-voltage Hall-effect latch family, engineered for robust magnetic sensing in harsh environments-specifically targeting motor control, motion feedback, and contactless switching in home appliances and industrial equipment.

FAQ

What is the magnetic polarity behavior of AH3714-P-B?

AH3714-P-B is a bipolar latch: a South pole applied to the marked side of the SOT23 package switches the open-drain output low (active), and a North pole releases it to high-impedance state. The output remains latched until magnetic polarity reverses past the release point (BRP), ensuring clean state retention without continuous field presence.

Does AH3714-P-B require an external pullup resistor?

Yes-AH3714-P-B has an open-drain output and requires an external pullup resistor to define the high logic level. Typical values range from 1kΩ to 10kΩ depending on rise-time and bus loading requirements. Unlike the AH3714A variant, AH3714-P-B does not include an internal pullup resistor.

Can AH3714-P-B operate directly from a 24V battery system?

Yes-AH3714-P-B supports 3.0V to 27V supply voltage and includes 40V load-dump protection, enabling direct connection to 24V automotive or industrial battery rails. No external voltage regulation or transient suppression is needed for ISO 7637-2 Pulse 5a compliance under standard layout conditions.

How does chopper stabilization improve performance in AH3714-P-B?

Chopper stabilization in AH3714-P-B dynamically cancels offset voltage in the Hall element and amplifier chain, reducing temperature-induced drift to <±0.5G/°C and minimizing sensitivity shift due to mechanical stress or package warpage-critical for maintaining accuracy in thermally cycling appliances and motor housings.