Diodes Incorporated AH180-FJG-7

Overview

AH180-FJG-7 from Diodes Incorporated is a micropower omnipolar Hall-effect sensor switch in DFN2020-3 package, designed for magnetic proximity detection in battery-powered devices. It operates from 2.5V to 5.5V, consumes only 8–24 µA average supply current at 3V, switches on with either north or south magnetic pole, and features open-drain output with 0.1–0.3 V on-state voltage at 1 mA load - used in clam-shell phone cover detection and notebook lid sensing.

For engineers reviewing the AH180-FJG-7 datasheet, AH180-FJG-7 pinout, AH180-FJG-7 application, or AH180-FJG-7 equivalent, key selection criteria include magnetic operate/release points (±40–60 G / ±10–30 G), chopper-stabilized temperature stability, RoHS-compliant green packaging, and DFN2020-3 footprint compatibility with space-constrained portable designs.

Technical Context

The AH180 employs dual Hall plates and chopper stabilization to cancel offset drift and suppress thermal and mechanical stress effects, enabling stable switching across –40°C to +85°C. Its latch-free architecture ensures immediate response to magnetic field transitions without internal memory retention.

It delivers omnidirectional sensitivity via polarity-agnostic magnetic actuation: output pulls low when |B| exceeds Bop (±40–60 G), releases when |B| falls below Brp (±10–30 G), and remains high-impedance with no field present - supporting contactless, wear-free switching in consumer enclosures.

Key Specifications

Pinout & Package

DFN2020-3 is a 2.0 mm × 2.0 mm × 0.6 mm near-chip-scale package with wettable flank leads, optimized for automated optical inspection and high-density PCB layouts. Pin 1 (Vdd) is marked by a corner chamfer or dot; pins are arranged linearly along one edge.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AL33201ELTTR and US5881LUA-AAA-000, AH180-FJG-7 uniquely balances ultra-low power (8–24 µA), true omnipolarity, and 5 kV HBM ESD in the smallest DFN2020-3 footprint - making it optimal for next-gen compact, battery-critical consumer electronics.

Availability

AH180-FJG-7 is available at Aetrix Electronics and suitable for clam-shell phone cover detection, notebook lid sensing, portable media player smart covers, and tablet keyboard attachment monitoring requiring stable component supply and long-term lifecycle support.

Supply support for AH180-FJG-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, headquartered in Plano, Texas, serving automotive, industrial, computing, and consumer markets with high-reliability components.

AH180 belongs to Diodes' Hall-effect sensor product line, engineered specifically for energy-efficient, contactless position and proximity sensing in portable electronics where size, power, and magnetic consistency are critical.

FAQ

What is the minimum recommended pull-up resistor value for the AH180-FJG-7 output?

The datasheet specifies a recommended pull-up range of 10 kΩ to 100 kΩ. A 10 kΩ resistor ensures fast rise time (<1 µs) and noise immunity in electrically noisy environments, while 100 kΩ minimizes current draw in ultra-low-power sleep modes. For most portable applications, 47 kΩ offers optimal balance between speed and power.

Does AH180-FJG-7 require an external bypass capacitor?

Yes - a 10 nF to 100 nF ceramic capacitor between Vdd and GND is mandatory per the datasheet. It stabilizes the internal regulator, suppresses supply ripple induced by RF sources, and prevents false triggering during transient events. Placement within 1 mm of the Vdd/GND pads is required for effective noise immunity.

Can AH180-FJG-7 operate reliably at 2.5 V with full magnetic specifications?

Yes - all electrical and magnetic characteristics (Bop, Brp, Idd, Vout) are guaranteed across the full 2.5 V to 5.5 V range, including at 2.5 V. The chopper-stabilized core maintains consistent switching thresholds and <15 G hysteresis even at minimum supply, verified from –40°C to +85°C.

Is the NC pin on AH180-FJG-7 safe to connect to ground?

No - the NC pin is not internally connected and must remain electrically floating. Grounding it may introduce leakage paths or parasitic capacitance that degrades magnetic sensitivity and increases susceptibility to board-level noise. Diodes' AP02001 layout guide explicitly prohibits connecting NC pins to any net.