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Diodes Incorporated AH182-PL-B
- Part No.:
- AH182-PL-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP
- Datasheet:
-
AH182-PL-B.pdf
- Description:
- MAGNETIC SWITCH UNIPOLAR 3SIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,194
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Product details
Overview
AH182-PL-B from Diodes Incorporated is a micropower, bipolar-operated Hall-effect switch in SIP-3L package, designed for battery-powered handheld devices. It features 5 µA typical average supply current (Idd(avg)), 40–60 Gauss south-pole activation (Bop), 10–30 Gauss release point (Brp), and operates from 2.5V to 5.5V - enabling ultra-low-power cover detection in clamshell phones and portable electronics.
For engineers reviewing the AH182-PL-B datasheet, AH182-PL-B pinout, AH182-PL-B application, or AH182-PL-B equivalent, key selection criteria include magnetic sensitivity polarity (south-pole active in SIP-3L), 15 µW total operating power at 2.75V, hysteresis-driven latching behavior, and SIP-3L thermal derating profile up to +150°C junction temperature.
Technical Context
The AH182-PL-B integrates a Hall plate, chopper-stabilized amplifier, offset-canceling circuitry, and open-drain NMOS output driver. Its bipolar switching logic responds to south-pole magnetic fields only when mounted with branded side facing the magnet - a fixed polarity configuration confirmed for SIP-3L packaging.
It employs dynamic offset cancellation to suppress thermal drift and mechanical stress effects, delivering ±0.1% typical Bop drift over −40°C to +85°C ambient. The device's 10–30 Gauss hysteresis (Bhy) ensures noise-immune switching without external Schmitt triggers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.5V to 5.5V - supports single-cell Li-ion and dual-cell alkaline battery systems without regulation. |
| Avg. Supply Current | 5 µA (typ) - enables multi-year operation in always-on cover-detect applications. |
| Operation Point (Bop) | 40–60 Gauss (south pole, branded side) - defines minimum field strength required to pull output low. |
| Release Point (Brp) | 10–30 Gauss - guarantees clean turn-off after magnetic field removal, preventing chatter. |
| Output Type | Open-drain NMOS - requires external pull-up; sinks up to 10 mA for direct LED or MCU GPIO interfacing. |
| Operating Temp | −40°C to +85°C - qualified for consumer and industrial portable equipment environments. |
| Power Dissipation | 550 mW (SIP-3L, TA = +25°C) - derates linearly to 0 mW at TJ = +150°C per published curve. |
Pinout & Package
Package: SIP-3L (Single In-line Package, 3-pin, straight-lead bulk variant). Dimensions: 2.00 mm × 1.15 mm × 0.51 mm (L×W×H), branded surface identifies active side orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vdd | Positive supply input - must be decoupled with 10–100 nF capacitor near pin for noise immunity. |
| 2 | GND | Ground reference - connects to system common; critical for stable Hall plate biasing. |
| 3 | Output | Open-drain output - sinks current when activated; requires 10–100 kΩ pull-up to Vdd or logic rail. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | 5 µA avg. supply current enables >5-year battery life in lid-open/close detection circuits. |
| Offset Canceling Technology | Chopper-stabilized architecture reduces thermal drift to <±0.1% Bop shift across full temperature range. |
| Superior Temperature Stability | Bop and Brp variation remains within datasheet limits from −40°C to +85°C without calibration. |
| Insensitivity to Physical Stress | Monolithic construction eliminates bond-wire shift effects - maintains consistent switching points after board flex or drop. |
| Green Packaging | SIP-3L meets RoHS 3, halogen-free (<900 ppm Br/Cl, <1000 ppm Sb), and lead-free requirements. |
Applications
| Cover Detection | Speed Sensing |
|---|---|
|
Use Scenario: Detecting flip-phone lid closure or laptop lid position using a small magnet embedded in the moving part. IC Role / Device Role / Timing Role: Hall-effect switch providing digital on/off signal to system controller upon magnetic proximity. Use Value: Consumes only 5 µA average current - extends battery runtime without compromising responsiveness (50–100 µs wake time). |
Use Scenario: Measuring rotational speed of small fans or motor shafts via gear tooth or magnet passing. IC Role / Device Role / Timing Role: Magnetic zero-crossing detector generating pulse train synchronized to rotation frequency. Use Value: 10–30 Gauss hysteresis prevents false triggering from vibration or EMI, ensuring accurate RPM counting. |
| Home Safety Sensors | Portable Device Status Monitoring |
|
Use Scenario: Door/window contact sensors in smart home security systems requiring long-life battery operation. IC Role / Device Role / Timing Role: Latching magnetic switch reporting intrusion state to wireless transceiver. Use Value: 15 µW total power at 2.75V allows use with coin cells for >3 years; SIP-3L footprint minimizes PCB area. |
Use Scenario: Monitoring docking status of Bluetooth earbuds in charging case or stylus in tablet cradle. IC Role / Device Role / Timing Role: Presence detector asserting wake signal to host SoC when accessory is inserted. Use Value: South-pole activation in SIP-3L ensures reliable detection regardless of magnet orientation in compact enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DIODES AH183-PL-B | Higher average current (280–500 µA vs. 5–10 µA); wider duty cycle (25% vs. 0.1%) | Less suitable for multi-year battery life; better for higher-speed or intermittent sensing | Select AH183 only if faster response or higher signal robustness outweighs power budget constraints. |
| Allegro A3212LLHLT-T | Unipolar south-pole operation; 3.5 µA typical Idd(avg); SC59 package; no SIP-3L option | Requires redesign for SC59 footprint; lacks SIP-3L mechanical compatibility for space-constrained lids | Choose A3212 only when SIP-3L is not mandatory and SC59 layout already exists. |
Compared with AH183-PL-B and A3212LLHLT-T, AH182-PL-B uniquely delivers sub-10 µA average current in SIP-3L - making it irreplaceable for ultra-low-power, space-limited cover detection where both form factor and multi-year battery life are non-negotiable.
Availability
AH182-PL-B is available at Aetrix Electronics and suitable for cover detection, home safety sensors, portable device status monitoring, and speed sensing requiring stable component supply despite its obsolete status - supported via legacy inventory and cross-qualified alternatives.
Supply support for AH182-PL-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.
AH182-PL-B belongs to Diodes' "Green" Hall-effect switch product line, engineered specifically for ultra-low-power, battery-operated consumer electronics where micropower consumption and RoHS-compliant packaging are primary design drivers.
FAQ
Is AH182-PL-B still in production?
No - AH182-PL-B is officially obsolete per Diodes' DS31024 Rev. 10 (August 2022). Aetrix Electronics holds remaining legacy stock and provides technical support for existing designs. No new wafers are being fabricated, and no second-source replacements are authorized by Diodes.
What is the magnetic polarity requirement for AH182-PL-B in SIP-3L?
AH182-PL-B in SIP-3L activates only with a south pole applied to the branded (marked) surface. North-pole exposure produces no output change. This polarity is fixed and cannot be reversed via configuration or external circuitry.
Can AH182-PL-B drive an LED directly?
Yes - its open-drain NMOS output can sink up to 10 mA. With a 3.3V supply and 10 kΩ pull-up, a standard red LED (2.0V VF, 5 mA IF) can be driven directly by connecting cathode to Pin 3 and anode to Vdd through a current-limiting resistor.
Does AH182-PL-B require an external capacitor?
Yes - a 10–100 nF ceramic capacitor between Vdd (Pin 1) and GND (Pin 2) is mandatory per datasheet recommendations to stabilize internal regulation and improve ESD/noise immunity during magnetic transitions.
AH182-PL-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-SIP
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- Unipolar Switch
- Technology:
- Hall Effect
- Polarization:
- South 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:
- Through Hole
- Supplier Device Package:
- 3-SIP
AH182-PL-B FAQ
1.How can I place an order for AH182-PL-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AH182-PL-B 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-PL-B reliable?
The price and inventory of AH182-PL-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH182-PL-B is usually 5 days.
3.What payment methods are accepted for AH182-PL-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH182-PL-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH182-PL-B?
AH182-PL-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH182-PL-B 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-PL-B?
For technical support, including AH182-PL-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH182-PL-B requirements.
6.How does Aetrix verify that AH182-PL-B is sourced from the original manufacturer or authorized distributors?
All AH182-PL-B 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-PL-B meets industry standards.
7.What is the process for return or replacement of AH182-PL-B?
All AH182-PL-B units undergo pre-shipment inspection (PSI). If there is an issue with AH182-PL-B, 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-PL-B part is unused and in its original packaging.
Return procedure for AH182-PL-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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