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Home > Products > Sensors, Transducers > Magnetic Sensors > Switches (Solid State)

Diodes Incorporated AH182-WG-7

Name: AH182-WG-7
Brand: Diodes Incorporated
SKU: AH182-WG-7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AH182-WG-7

Manufacturer:: Diodes Incorporated

Category:: Switches (Solid State)

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: AH182-WG-7.pdf

Description:: MAGNETIC SWITCH UNIPOLAR SC59-3

Quantity:: RFQ Add To RFQ list

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Inventory:57,888

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Product details

Overview

AH182-WG-7 from Diodes Incorporated is a micropower, bipolar-operated Hall-effect switch in SC59 (SOT-23) package, designed for battery-powered portable electronics. It features 2.5–5.5V operation, 5–10 µA average supply current (AH182), 40–60 Gauss operate point (south pole activation), and open-drain output with 0.1 V typical on-state voltage at 1 mA - deployed in clamshell phone lid detection and PDA cover sensing.

For engineers reviewing the AH182-WG-7 datasheet, AH182-WG-7 pinout, AH182-WG-7 application, or AH182-WG-7 equivalent, key selection criteria include magnetic polarity sensitivity (south-pole-on for SC59), ultra-low power consumption (<15 µW at 2.75 V), thermal stability across –40°C to +85°C, and RoHS-compliant "Green" packaging with halogen/antimony-free molding compound.

Technical Context

The AH182-WG-7 integrates a Hall plate, chopper-stabilized amplifier, offset-canceling circuitry, and CMOS output driver in a single die. Its hysteresis (B_hy ≥10 Gauss) ensures noise-immune switching, while the internal regulation enables stable operation across 2.5–5.5 V supply range without external LDO.

Magnetic actuation is polarity-specific per package: SC59 (AH182-WG-7) activates on south-pole approach to the branded side, with B_op = 40–60 Gauss and B_rp = 10–30 Gauss. The device remains latched off with no field and exhibits <0.1 µA leakage current when inactive.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	2.5 V to 5.5 V - supports direct connection to Li-ion, NiMH, or alkaline battery rails without regulation.
Avg. Supply Current	5–10 µA (AH182) - enables multi-year operation in coin-cell–powered cover detectors.
Operate Point (B_op)	40–60 Gauss (south pole) - sets mechanical air-gap tolerance of ~1.5–2.5 mm with standard ferrite magnets.
Output Type	Open-drain NMOS - allows flexible pull-up to any logic rail (e.g., 1.8 V, 3.3 V, or 5 V) and wired-OR interfacing.
Operating Temp	–40°C to +85°C - validated for consumer handhelds and industrial control panels without derating.
Package	SC59 (SOT-23) - 2.9 × 1.3 × 1.0 mm footprint compatible with high-density PCB layouts and automated SMT assembly.
RoHS Status	Lead-free, halogen-free, antimony-free "Green" - meets EU RoHS 3 (2015/863/EU) and JEDEC JS709C requirements.

Pinout & Package

SC59 (SOT-23) package: 2.90–3.10 mm length, 1.00–1.30 mm width, 1.00–1.45 mm height; thermally optimized for 230 mW dissipation at 25°C ambient.

Pin/Terminal	Circuit Role	Design Meaning
Vdd	Power supply input	Accepts 2.5–5.5 V; internal regulator supplies bias to Hall sensor and logic - no external decoupling required beyond 10–100 nF.
GND	Ground reference	Low-impedance return path for Hall plate, amplifier, and output stage - must be connected before Vdd during power-up.
Output	Open-drain digital output	Sinks up to 10 mA; pulled low when B ≥ B_op; floats when B ≤ B_rp - requires external pull-up resistor (10–100 kΩ).

Key Features

Feature	Design Value
Micropower operation	5–10 µA avg. current enables >5-year battery life in lid-open/close detection circuits using CR2032 cells.
Offset-canceling technology	Chopper stabilization eliminates thermal drift and process variation - maintains ±10% B_op consistency over temperature and lifetime.
Polarity-specific activation	South-pole-only turn-on in SC59 orientation prevents false triggers from stray north-pole fields in stacked PCB assemblies.
Stress-insensitive design	Monolithic construction minimizes sensitivity to PCB warpage or encapsulation-induced mechanical stress - critical for thin mobile form factors.

Applications

Cover Detection

Speed Sensing

Use Scenario: Detecting flip-phone lid open/closed state or tablet keyboard dock engagement.

IC Role / Device Role / Timing Role: Digital proximity switch providing clean, debounced logic-level signal to baseband processor GPIO.

Use Value: Eliminates mechanical microswitch wear-out; operates reliably after >100,000 actuations with no contact bounce.

Use Scenario: Measuring rotational speed of small DC motors or fan blades using embedded magnets.

IC Role / Device Role / Timing Role: Edge-triggered magnetic event detector feeding pulse train to MCU timer capture input.

Use Value: Supports 10–20 Hz to 200 Hz measurement range with <50 µs wake-up latency and minimal jitter.

Home Safety Sensor

Portable Device Positioning

Use Scenario: Monitoring cabinet door status in smart home appliances (e.g., oven, dishwasher) for child lock interlock.

IC Role / Device Role / Timing Role: Fail-safe position indicator interfaced to appliance controller via opto-isolated input.

Use Value: Operates down to 2.5 V during brown-out conditions; immune to ESD events common in kitchen environments.

Use Scenario: Determining hinge angle or fold state in dual-screen tablets or foldable smartphones.

IC Role / Device Role / Timing Role: Dual-Hall system companion (with AH183 or similar) enabling coarse angular resolution via differential field mapping.

Use Value: Enables low-power "fold-aware" UI transitions without continuous IMU polling or battery drain.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
AL3320EUA-7	Unipolar, 3–24 V supply, 3.5 mA I_DD, SC59 package	Requires stronger magnet (B_op = 120–200 Gauss); higher power limits use in always-on systems	Select when wider voltage range or higher noise immunity is needed; not suitable for sub-10 µA battery budgets.
US1881EUA-7	Bipolar, 3–24 V, 3.5 mA I_DD, same SC59 footprint	Activates on both poles (south-on and north-on); lacks polarity selectivity	Choose where bidirectional actuation is acceptable and lower cost is prioritized over magnetic orientation control.

Compared with AL3320EUA-7 and US1881EUA-7, AH182-WG-7 uniquely delivers sub-10 µA average current with south-pole-only activation in SC59 - making it optimal for space-constrained, long-life cover detection where polarity discrimination prevents misoperation.

Availability

AH182-WG-7 is available at Aetrix Electronics and suitable for cover detection, speed sensing, home safety sensors, and portable device positioning requiring stable component supply and full traceability through end-of-life transition support.

Supply support for AH182-WG-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, with design centers across Asia and manufacturing in IATF 16949-certified facilities.

The AH182/AH183 series belongs to Diodes' Green Hall-effect Switch product line, engineered specifically for ultra-low-power, polarity-discriminating presence detection in portable and battery-operated consumer electronics.

FAQ

What magnetic polarity activates AH182-WG-7?

AH182-WG-7 activates only when a south pole of sufficient strength approaches the branded side of the SC59 package. This polarity specificity prevents unintended triggering from nearby north-pole sources and enables reliable operation in multi-sensor layouts where field direction matters.

Can AH182-WG-7 operate directly from a 1.8 V rail?

No - AH182-WG-7 requires a minimum 2.5 V supply to guarantee specified performance including B_op, timing, and output drive. Below 2.5 V, functionality is not characterized and may fail to activate or exhibit increased hysteresis uncertainty.

Is AH182-WG-7 pin-compatible with AH183-WG-7?

Yes - both share identical SC59 pinout (Vdd, GND, Output), same footprint, and identical marking orientation. However, AH183 draws 280–500 µA average current and has longer period (200–400 ms), making it unsuitable as a drop-in replacement where micropower operation is required.

Does AH182-WG-7 require an external capacitor?

A 10–100 nF ceramic capacitor between Vdd and GND is recommended per the datasheet to stabilize supply during magnetic transitions and improve noise immunity - especially in electrically noisy environments like motor-driven enclosures or RF-rich handheld devices.

AH182-WG-7 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Function:: Unipolar Switch

Technology:: Hall Effect

Polarization:: North Pole

Sensing Range:: -6mT Trip, 1mT Release

Test Condition:: 25°C

Voltage - Supply:: 2.5V ~ 5.5V

Current - Supply (Max):: 10µA

Current - Output (Max):: 10mA

Output Type:: Open Drain

Features:: -

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SC-59-3

AH182-WG-7 FAQ

1.How can I place an order for AH182-WG-7 through Aetrix?

Please submit a Request for Quotation (RFQ) for AH182-WG-7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for AH182-WG-7 reliable?

The price and inventory of AH182-WG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH182-WG-7 is usually 5 days.

3.What payment methods are accepted for AH182-WG-7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH182-WG-7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AH182-WG-7?

AH182-WG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AH182-WG-7 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for AH182-WG-7?

For technical support, including AH182-WG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH182-WG-7 requirements.

6.How does Aetrix verify that AH182-WG-7 is sourced from the original manufacturer or authorized distributors?

All AH182-WG-7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AH182-WG-7 meets industry standards.

7.What is the process for return or replacement of AH182-WG-7?

All AH182-WG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH182-WG-7, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The AH182-WG-7 part is unused and in its original packaging.

Return procedure for AH182-WG-7:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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