Diodes Incorporated AH3572-P-B

Overview

AH3572-P-B from Diodes Incorporated is a high-voltage, high-sensitivity Hall effect omnipolar switch IC in SIP-3 (Bulk Pack) package, operating from 3.0V to 28V supply, with ±20G typical operate point (BOP), ±10G typical release point (BRP), and open-drain output rated for 60mA continuous current-used for non-contact position detection in smart home appliances and industrial flow meters.

For engineers reviewing the AH3572-P-B datasheet, AH3572-P-B pinout, AH3572-P-B application, or AH3572-P-B equivalent, key selection criteria include magnetic sensitivity tolerance over −40°C to +125°C, chopper-stabilized offset cancellation, reverse battery protection, Zener clamping on VDD/output, and SIP-3 mechanical compatibility with bulk-handling assembly lines.

Technical Context

The AH3572 employs dynamic offset cancellation via chopper stabilization at 800 kHz to suppress thermal drift and mechanical stress-induced errors, enabling stable switching thresholds across temperature. Its internal bandgap regulator supplies temperature-compensated bias to analog blocks, ensuring consistent BOP/BRP hysteresis of 10G typical over full operating range.

Omnipolar operation is achieved through dual-polarity magnetic sensing circuitry that activates the open-drain output for either South or North pole approach to the marked side. The output stage integrates over-current limiting (30–55 mA), reverse-battery protection (−28 V), and Zener clamps on both VDD and OUTPUT pins for robustness in noisy industrial environments.

Key Specifications

Pinout & Package

Package: SIP-3 (Bulk Pack), straight-lead, 3-pin single-inline package with 2.54 mm pitch, optimized for automated bulk placement and wave soldering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AL3505-30A and US1881EUA-AAA-000, the AH3572-P-B delivers superior magnetic sensitivity (±20G BOP), integrated reverse-battery resilience, and higher ESD robustness-making it optimal for unregulated 24 V industrial nodes where layout space for protection circuitry is constrained.

Availability

AH3572-P-B is available at Aetrix Electronics and suitable for smart home appliance lid detection, industrial flow meter rotor sensing, office equipment paper jam detection, and building automation window position sensing requiring stable component supply across extended temperature and voltage ranges.

Supply support for AH3572-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, high-efficiency power management and signal integrity solutions for industrial, computing, and consumer markets.

The AH3572 belongs to Diodes' Hall-effect sensor product line, engineered specifically for robust, maintenance-free proximity and position sensing in harsh environments where wide voltage operation and magnetic immunity are essential.

FAQ

What is the maximum continuous output current rating for AH3572-P-B?

The AH3572-P-B has a guaranteed continuous output current rating of 60 mA, with internal current limiting active between 30 mA and 55 mA depending on junction temperature and supply voltage. This allows direct driving of small relays or optocouplers without external buffering, provided the load remains within the specified SOA limits defined in the thermal derating curves.

Does AH3572-P-B require an external pull-up resistor on the OUTPUT pin?

Yes, AH3572-P-B features an open-drain N-channel output and requires an external pull-up resistor to VDD or another logic rail. Typical values range from 1 kΩ to 10 kΩ depending on rise-time requirements and bus capacitance; Diodes recommends 10 nF to 100 nF bypass capacitor (CIN) at VDD for noise immunity when used with such resistors.

Can AH3572-P-B operate from a 3.3 V supply in low-power IoT applications?

Yes, AH3572-P-B operates down to 3.0 V, making it compatible with 3.3 V microcontroller systems. At 3.3 V, its supply current remains ≤4 mA across −40°C to +125°C, and magnetic thresholds remain functional-though BOP/BRP shift slightly (±8 G min at −40°C). No level-shifting is needed for GPIO interfacing.

Is the SIP-3 (Bulk Pack) variant of AH3572-P-B compatible with standard pick-and-place equipment?

Yes, AH3572-P-B in SIP-3 (Bulk Pack) uses straight leads and conforms to JEDEC MS-012 standards with 2.54 mm pitch and defined coplanarity (≤0.15 mm). Its 14.5 mm body length and 1.5 mm lead span meet common vision-guided placement tolerances, and bulk packaging supports vibratory bowl feeders and tapeless SMT lines.