Diodes Incorporated AH1806-P-B

Overview

AH1806-P-B from Diodes Incorporated is a high-sensitivity, micropower omnipolar Hall-effect switch IC designed for magnetic tamper detection in smart meters and position sensing in battery-powered consumer and industrial equipment. It operates from 2.5V to 5.5V, consumes only 8–16 µA average supply current at 3V, features open-drain output with 0.1V typical on-state voltage at 1mA, and delivers ±15–45 Gauss operate points for both North and South poles.

For engineers reviewing the AH1806 datasheet, AH1806 pinout, AH1806 application, or AH1806 equivalent, this device is selected for ultra-low-power contactless switching where magnetic polarity independence, thermal stability across –40°C to +85°C, and RF noise immunity are critical - especially in sealed, long-life metering and portable electronics designs.

Technical Context

The AH1806 uses dual Hall plates with chopper-stabilized architecture to cancel offset drift and deliver stable switching thresholds across temperature and supply voltage. Its sleep/awake duty cycle (0.1% typical) enables microamp-level average current draw while maintaining 75–125 µs wake-up latency and 75–125 ms sampling period.

It implements latched logic with built-in hysteresis (5–10 Gauss), supports single open-drain output with 2.5 mA sink capability, and achieves >6 kV HBM ESD robustness - all within a SIP-3 (Bulk Pack) package optimized for through-hole mounting in cost-sensitive industrial assemblies.

Key Specifications

Pinout & Package

SIP-3 (Bulk Pack) is a 3-pin straight-lead through-hole package with 1.5 mm body width, 4.1 mm length, and 3.0 mm width. Pin 1 = VDD, Pin 2 = GND, Pin 3 = OUTPUT - no NC pins; all pins electrically active and required for operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AL33030T-30-T1 and US1881EUA-12, the AH1806-P-B uniquely balances ultra-low power (sub-10 µA avg), chopper-stabilized thermal performance, and true omnipolarity - making it optimal for sealed, long-life, battery-operated metering and portable devices where field reliability trumps raw sensitivity or voltage range.

Availability

AH1806-P-B is available at Aetrix Electronics and suitable for smart meter tamper detection, portable display lid switching, and industrial equipment door interlocks requiring stable component supply across multi-year production cycles.

Supply support for AH1806-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.

The AH1806 belongs to Diodes' Hall-effect sensor product line, engineered specifically for ultra-low-power, high-reliability contactless switching in energy metering, consumer electronics, and industrial safety systems.

FAQ

What is the maximum recommended supply voltage for continuous operation of AH1806-P-B?

The absolute maximum VDD rating is 7V, but this is a transient stress limit only. For reliable continuous operation, the supply must remain within 2.5V to 5.5V as specified in Recommended Operating Conditions. Exceeding 5.5V risks accelerated parametric degradation and reduced lifetime, even if initial functionality appears normal.

Does AH1806-P-B require an external pull-up resistor on its output pin?

Yes - the AH1806-P-B has an open-drain output that can only sink current. A pull-up resistor (10 kΩ to 100 kΩ) between VDD and OUTPUT is mandatory to establish a valid logic-high state when the output is inactive. Without it, the output floats and cannot drive downstream logic reliably.

Can AH1806-P-B be used in environments with strong RF fields, such as near GSM transceivers or switching power supplies?

Yes - the AH1806-P-B incorporates layout and circuit-level RF immunity enhancements, including chopper stabilization and internal filtering. It has been validated to reject common RF interference sources without external shielding or ferrite beads, making it suitable for use in wireless-enabled smart meters and portable electronics.

Is the SIP-3 (Bulk Pack) package of AH1806-P-B compatible with wave soldering processes?

Yes - the SIP-3 (Bulk Pack) package is rated for standard wave soldering profiles with peak temperatures up to 260°C for 10 seconds. Its lead finish is matte tin, and thermal performance data confirms safe operation under IPC-J-STD-020 moisture sensitivity level 1 conditions without pre-baking.