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Diodes Incorporated AH182-PG-B
- Part No.:
- AH182-PG-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP
- Datasheet:
-
AH182-PG-B.pdf
- Description:
- MAGNETIC SWITCH UNIPOLAR 3SIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,367
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Product details
Overview
AH182-PG-B from Diodes Incorporated is a micropower, bipolar-operated Hall-effect switch in SIP-3L package, designed for battery-powered handheld devices. It operates from 2.5V to 5.5V, consumes only 5–10 µA average supply current, features 40–60 G operation point (Bop), and switches output low when exposed to sufficient south-pole magnetic field - used in clamshell cover detection and position sensing.
For engineers reviewing the AH182-PG-B datasheet, AH182-PG-B pinout, AH182-PG-B application, or AH182-PG-B equivalent, key selection criteria include ultra-low power consumption (<10 µA avg), SIP-3L thermal derating profile, magnetic hysteresis (≥10 G), Bop/Brp stability over −40°C to +85°C, and RoHS-compliant green packaging with lead-free finish.
Technical Context
The AH182-PG-B integrates a Hall plate, chopper-stabilized amplifier, offset-cancelling circuitry, and open-drain CMOS output driver in a single die. Its internal architecture enables stable switching under mechanical stress and temperature variation, with hysteresis (Bhy) ensuring noise-immune state retention.
It functions as a digital proximity sensor: output turns on (low) when B ≥ Bop (40–60 G, south pole), remains latched until B ≤ Brp (10–30 G), then releases. Awake time is ≤100 µs, and duty cycle is 0.1%, enabling multi-year battery life in intermittent-sense applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.5V to 5.5V - compatible with single-cell Li-ion, NiMH, and alkaline battery systems without regulation. |
| Avg. Supply Current | 5–10 µA - enables >5-year operation on CR2032 coin cell in 1Hz wake-up interval. |
| Operation Point (Bop) | 40–60 Gauss (south pole) - ensures reliable actuation with small ferrite magnets at 2–4 mm air gap. |
| Hysteresis (Bhy) | ≥10 Gauss - prevents chatter during slow magnetic transitions near threshold. |
| Output Type | Open-drain CMOS - supports flexible pull-up to any voltage ≤Vdd, compatible with 1.8V–5V logic interfaces. |
| Operating Temp. | −40°C to +85°C - validated for consumer portable and industrial enclosure environments. |
| Power Dissipation | 550 mW (SIP-3L, 25°C) - derates linearly to 0 mW at TJ = +150°C; supports high-density PCB layouts. |
Pinout & Package
Package: SIP-3L (Single In-line Package, 3-pin, straight-lead bulk variant). Dimensions: 3.00 × 1.30 × 1.70 mm (L×W×H), branded surface identifies active area location.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Vdd | Power supply input - must be decoupled with 10–100 nF capacitor close to pin for noise immunity. |
| 2 | GND | Ground reference - shared return path for Hall plate, amplifier, and output stage; requires low-impedance connection. |
| 3 | Output | Open-drain output - sinks up to 10 mA; requires external pull-up (10–100 kΩ) to define logic-high level. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | 5–10 µA avg. supply current enables >5-year battery life in low-duty-cycle cover-detect applications. |
| Offset Cancelling Technology | Chopper-stabilized architecture eliminates thermal drift and process-induced offset, maintaining Bop stability across temperature. |
| Superior Temperature Stability | Bop shift < ±10% over −40°C to +85°C - avoids recalibration in uncontrolled ambient deployments. |
| Insensitive to Physical Stress | Monolithic construction resists sensitivity shift from PCB flexure or encapsulation strain in compact handheld assemblies. |
| Green Packaging | SIP-3L with lead-free finish, halogen/antimony-free molding compound - meets RoHS 3 (2015/863/EU) and JEDEC MSL1 requirements. |
Applications
| Cover Detection | Speed Sensing |
|---|---|
|
Use Scenario: Detect lid closure in foldable smartphones and tablets using magnet-integrated hinge. IC Role / Device Role / Timing Role: Digital proximity switch providing TTL-compatible enable signal upon magnetic field presence. Use Value: Ultra-low 5–10 µA quiescent current extends standby battery life by >30% versus standard Hall switches. |
Use Scenario: Measure rotational speed of small DC motor shaft via embedded magnet and fixed sensor. IC Role / Device Role / Timing Role: Edge-triggered magnetic event detector generating clean low-going pulses per revolution. Use Value: 100 µs max awake time and 0.1% duty cycle minimize average current draw during continuous monitoring. |
| Home Safety Sensor | Industrial Position Feedback |
|
Use Scenario: Monitor door/window status in smart home security systems with battery-powered wireless nodes. IC Role / Device Role / Timing Role: Magnetic presence detector interfacing directly to sub-GHz RF SoC GPIO with no level-shifting. Use Value: Open-drain output supports 1.8V–5V pull-up, enabling direct compatibility with ESP32, nRF52, and SiLabs EFM32 MCUs. |
Use Scenario: Sense end-of-travel in linear actuators within HVAC damper control modules. IC Role / Device Role / Timing Role: Fail-safe position limiter preventing mechanical overtravel via hardwired interrupt signal. Use Value: −40°C to +85°C operating range and ±10% Bop drift ensure reliable operation in unheated outdoor 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 |
|---|---|---|---|
| ALLEGRO A3212LLHLT-T | Higher Idd(avg) = 17 µA; Bop = 30–55 G; SC70-3 package (1.25 × 0.85 mm). | Smaller footprint but lower thermal mass - unsuitable for high-temperature sustained operation (>85°C ambient). | Select when board space is constrained and average current budget allows ~3× higher than AH182-PG-B. |
| MELEXIS US5881LUA-ABA-000-REEL | Unipolar (south-only), Idd(avg) = 2.5 µA, Bop = 20–40 G, TSOT-23-3 package. | Lacks hysteresis specification; requires external RC filtering for noise immunity in EMI-prone environments. | Select only for ultra-low-power, low-noise environments where magnetic field strength is tightly controlled. |
Compared with A3212LLHLT-T and US5881LUA-ABA-000-REEL, AH182-PG-B offers superior thermal robustness (550 mW @ 25°C), guaranteed hysteresis (≥10 G), and SIP-3L mechanical stability - making it optimal for cost-sensitive, high-volume portable electronics requiring long-term reliability without design margin trade-offs.
Availability
AH182-PG-B is available at Aetrix Electronics and suitable for cover detection, speed sensing, home safety sensors, and industrial position feedback requiring stable component supply and RoHS-compliant green packaging.
Supply support for AH182-PG-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 semiconductor company specializing in discrete, analog, and mixed-signal solutions, with manufacturing certified to IATF 16949 and quality systems aligned to AEC-Q200.
AH182-PG-B belongs to Diodes' Green Hall-effect Switch product line, engineered specifically for ultra-low-power, battery-operated consumer electronics requiring high magnetic sensitivity and environmental resilience.
FAQ
What is the magnetic polarity requirement for AH182-PG-B activation?
The AH182-PG-B activates (output low) when a south pole of sufficient strength approaches the branded side of the SIP-3L package. Its Bop is specified at 40–60 Gauss for south-pole excitation; north-pole exposure does not trigger switching. This polarity behavior is fixed per package type and cannot be reversed via configuration.
Can AH182-PG-B operate directly from a 1.8V supply?
No. AH182-PG-B requires a minimum supply voltage of 2.5V per its Recommended Operating Conditions. At 1.8V, the internal regulator and Hall amplifier fail to bias correctly, resulting in undefined output behavior and potential latch-up. A boost converter or LDO is required to raise voltage to ≥2.5V for reliable operation.
Is AH182-PG-B pin-compatible with AH183 variants?
Yes - AH182-PG-B and AH183 variants share identical SIP-3L pinout (Vdd, GND, Output), same footprint, and identical electrical interface. However, AH183 draws 280–500 µA average current versus AH182's 5–10 µA, so substitution affects battery life and thermal design but not layout or firmware.
Does AH182-PG-B require an external pull-up resistor?
Yes. The output is open-drain CMOS and must be pulled up externally to a logic-compatible voltage (≤Vdd). Diodes recommends 10–100 kΩ; 47 kΩ is typical for 3.3V systems. Omitting the pull-up results in floating output and undefined microcontroller input states.
AH182-PG-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-PG-B FAQ
1.How can I place an order for AH182-PG-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AH182-PG-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-PG-B reliable?
The price and inventory of AH182-PG-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-PG-B is usually 5 days.
3.What payment methods are accepted for AH182-PG-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH182-PG-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH182-PG-B?
AH182-PG-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH182-PG-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-PG-B?
For technical support, including AH182-PG-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH182-PG-B requirements.
6.How does Aetrix verify that AH182-PG-B is sourced from the original manufacturer or authorized distributors?
All AH182-PG-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-PG-B meets industry standards.
7.What is the process for return or replacement of AH182-PG-B?
All AH182-PG-B units undergo pre-shipment inspection (PSI). If there is an issue with AH182-PG-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-PG-B part is unused and in its original packaging.
Return procedure for AH182-PG-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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