Diodes Incorporated AH1713-SA-7

Overview

AH1713-SA-7 from Diodes Incorporated is a low-voltage, high-sensitivity Hall effect latch switch in SOT23 package, designed for position sensing and brushless DC motor commutation. It operates from 2.4V to 5.5V, features ±50 G typical operate point (Bop), ±50 G release point (Brp), open-drain output, and functions reliably from –40°C to +125°C in industrial motion control systems.

For engineers reviewing the AH1713-SA-7 datasheet, AH1713-SA-7 pinout, AH1713-SA-7 application, or AH1713-SA-7 equivalent, key selection criteria include magnetic sensitivity tolerance (±81 G max Bop), latch hysteresis (100 G max), chopper-stabilized offset cancellation, and SOT23-compatible PCB layout with 10 nF–100 nF bypass capacitor support.

Technical Context

The AH1713-SA-7 implements a chopper-stabilized architecture with dynamic offset cancellation, delivering stable switching thresholds across temperature and supply voltage variations. Its internal bandgap regulator supplies temperature-compensated bias to analog blocks, enabling consistent Bop/Brp performance from –40°C to +125°C.

This device latches output low when South pole magnetic flux exceeds +50 G (typical) and holds until reverse polarity reduces flux below –50 G (typical); the 100 G hysteresis prevents chatter in noisy mechanical environments. The open-drain output sinks up to 20 mA with <0.4 V saturation at 20 mA load.

Key Specifications

Pinout & Package

Package: SOT23 - surface-mount, 3-pin, JEDEC-standard footprint (2.9 mm × 1.3 mm × 1.0 mm), RoHS-compliant matte tin plating, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AH1713-SA-7, A1174LUA-T offers higher voltage headroom but sacrifices PCB space and low-voltage compatibility, while US5881LUA-ABA-000-RE reduces system component count at the expense of magnetic sensitivity margin and startup time stability.

Availability

AH1713-SA-7 is available at Aetrix Electronics and suitable for brushless DC motor commutation, flow meter RPM sensing, and e-bike angular position detection requiring stable component supply across industrial production cycles.

Supply support for AH1713-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for industrial, automotive, and computing markets since 1960.

The AH171x series belongs to Diodes' precision Hall-effect sensor product line, engineered specifically for robust, low-power position and speed sensing in harsh thermal and electromagnetic environments.

FAQ

What is the magnetic polarity response of AH1713-SA-7?

AH1713-SA-7 activates its open-drain output (pulls low) when a South pole magnetic field exceeding +16 G is applied perpendicular to the top surface of the SOT23 package. The output remains latched until the field reverses polarity and falls below –16 G, at which point it releases to high-impedance state. This direct-polarity behavior distinguishes it from the inverted AH1714 variant.

Can AH1713-SA-7 operate from a 2.4 V lithium coin cell?

Yes - AH1713-SA-7 is fully specified down to 2.4 V supply, with typical supply current of 2.0 mA at 25°C and ≤3.2 mA across –40°C to +125°C. Its chopper-stabilized core maintains Bop/Brp accuracy even at this minimum voltage, making it suitable for long-life battery-powered encoders and portable sensors.

What is the recommended pull-up resistor value for the open-drain output?

A 4.7 kΩ to 10 kΩ pull-up resistor to VDD is recommended for most applications. At 5.5 V supply and 20 mA sink, VOL remains ≤0.4 V; lower resistance improves rise time but increases static power. For 3.3 V systems with 100 pF trace capacitance, 4.7 kΩ achieves <1 µs rise time while limiting idle current to ~0.7 mA.

Does AH1713-SA-7 require an external bypass capacitor?

Yes - a 10 nF to 100 nF ceramic capacitor must be placed between VDD and GND, as close as possible to pins 1 and 3. This stabilizes the internal bandgap regulator, suppresses supply ripple-induced false triggering, and enhances RF noise immunity per DS45410 Rev. 3–2 test data. Omission degrades startup time consistency and magnetic threshold stability.