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Diodes Incorporated AH1809-P-B
- Part No.:
- AH1809-P-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP
- Datasheet:
-
AH1809-P-B.pdf
- Description:
- MAGNETIC SWITCH OMNIPOLAR 3SIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,071
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Product details
Overview
AH1809-P-B from Diodes Incorporated is a low-sensitivity, micropower omnipolar Hall-effect switch IC designed for contactless position sensing in battery-powered smart meters, tamper detection systems, and industrial proximity applications. It operates from 2.5V to 5.5V, consumes only 8–16 µA average supply current at 3V, features ±130 Gauss typical operate point (Bop), 15 Gauss typical hysteresis, and delivers open-drain output switching with <0.3 V on-state voltage at 1 mA sink.
For engineers reviewing the AH1809-P-B datasheet, AH1809-P-B pinout, AH1809-P-B application, or AH1809-P-B equivalent, this page provides verified magnetic thresholds, package-specific terminal mapping, real-world use cases in e-metering and lid detection, and validated alternatives with documented Bop/Brp and temperature drift differences.
Technical Context
The AH1809 employs dual Hall plates and chopper-stabilized architecture to suppress offset drift and deliver stable switching across –40°C to +125°C. Its omnipolar response enables activation by either North or South magnetic pole, eliminating polarity alignment constraints during mechanical integration.
Magnetic thresholds are defined by Bop (±100–165 Gauss) and Brp (±90–150 Gauss) with 5–20 Gauss hysteresis, ensuring noise-immune latching behavior. The device alternates between ultra-low-power sleep mode (5–10 µA) and brief awake periods (75–125 µs), achieving micropower operation without sacrificing responsiveness.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.5V to 5.5V - supports single-cell Li-ion, 3.3V/5V rails, and wide-battery-voltage designs without regulation. |
| Average Supply Current | 8–16 µA @ 3V, 25°C - enables >10-year battery life in smart meter tamper switches with typical polling intervals. |
| Operate Point (Bop) | ±100–165 Gauss - low sensitivity allows reliable actuation with small, low-cost magnets at air gaps up to 3 mm. |
| Hysteresis (Bhy) | 5–20 Gauss - prevents chatter near threshold; sufficient margin for mechanical vibration in door/lid sensors. |
| Output Type | Open-drain - permits flexible pull-up to any logic rail (up to 5.5V), enabling level-shifting and wired-OR configurations. |
| Operating Temperature | –40°C to +125°C - qualified for outdoor smart meter enclosures and industrial control panels without derating. |
| ESD Rating | 6 kV HBM - withstands handling and board-level ESD events common in automated assembly and field service. |
Pinout & Package
AH1809-P-B is supplied in SIP-3L package (straight-lead, bulk pack), with 3 terminals: VDD, GND, and OUTPUT. Pin 1 = VDD, Pin 2 = GND, Pin 3 = OUTPUT - no NC pins. Package height ≤0.432 mm enables flush mounting behind thin plastic housings in e-meter front panels.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VDD) | Positive power supply input | Accepts 2.5–5.5V; internal UVLO ensures clean startup above 2.3V; decoupling capacitor (10–100 nF) required for RF immunity. |
| 2 (GND) | Reference ground return | Must be low-impedance path to system ground; shared with load return for open-drain output stage. |
| 3 (OUTPUT) | Open-drain output driver | Sinks up to 2.5 mA; requires external pull-up (10–100 kΩ); logic-low = magnet present; high-Z = no field or release. |
Key Features
| Feature | Design Value |
|---|---|
| Omnipolar magnetic response | Activates with either North or South pole - eliminates magnet orientation dependency in high-volume consumer assembly. |
| Chopper-stabilized architecture | Reduces thermal drift of Bop/Brp to ±15 Gauss over –40°C to +125°C - maintains consistent trip points across environmental stress. |
| Micropower sleep/awake cycling | 75–125 µs awake time, 75–125 ms period - achieves sub-16 µA average current while retaining 8 Hz effective sampling rate. |
| High ESD immunity | 6 kV HBM rating - survives direct handling and connector mating without external protection diodes. |
| Small SIP-3L footprint | 4.1 × 3.0 × 0.43 mm - fits behind 2 mm-thick polycarbonate covers in smart meter front bezels and appliance control panels. |
Applications
| Smart E-Meter Tamper Detection | Industrial Door/Lid Position Sensing |
|---|---|
|
Use Scenario: Detect unauthorized access to utility meter enclosures via magnetic seal disruption. IC Role / Device Role / Timing Role: Omnipolar Hall switch triggers tamper flag when magnet moves away from SIP-3L sensor mounted inside meter housing. Use Value: 15 Gauss hysteresis prevents false alarms from vibration; 8 µA avg. current extends battery backup life beyond 10 years. |
Use Scenario: Monitor open/closed state of control cabinet doors in factory automation systems. IC Role / Device Role / Timing Role: SIP-3L-mounted AH1809-P-B drives PLC input via open-drain output when door-mounted magnet passes within 2.5 mm. Use Value: –40°C to +125°C rating ensures reliability in unconditioned electrical rooms; SC59/SOT553 alternatives not rated for >105°C ambient. |
| Consumer Appliance Tray Detection | Proximity-Based On/Off Switch |
|
Use Scenario: Confirm proper insertion of detergent drawer in washing machines before cycle start. IC Role / Device Role / Timing Role: Low-sensitivity switch activates only when drawer magnet aligns precisely - rejects stray fields from motor or solenoids. Use Value: ±130 Gauss Bop tolerance accommodates magnet strength variation across production batches without recalibration. |
Use Scenario: Replace mechanical pushbuttons in medical devices with touchless activation using hand proximity. IC Role / Device Role / Timing Role: Paired with soft ferrite-shielded magnet, AH1809-P-B detects hand-induced flux change at 15–20 mm distance. Use Value: Omnipolar operation allows magnet placement flexibility; 6 kV ESD rating meets IEC 60601-1 system-level ESD requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar omnipolar Hall-effect switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL33201ELTTR | Bop = ±30 Gauss (higher sensitivity); IDD(avg) = 2.5 µA @ 3V - lower power but narrower magnetic window. | Better suited for short-gap (<1 mm), high-precision position sensing; less tolerant of magnet misalignment or aging. | Select when ultra-low power dominates and mechanical tolerances allow tight flux control. |
| US1881N | Bop = ±50 Gauss; Brp = ±35 Gauss; hysteresis = 15 Gauss; -40°C to +85°C rating only. | Limited to indoor consumer appliances; cannot replace AH1809-P-B in outdoor smart meters requiring 125°C operation. | Choose for cost-sensitive, non-industrial applications where extended temperature range is unnecessary. |
Compared with AL33201ELTTR and US1881N, AH1809-P-B uniquely balances low-sensitivity robustness (±130 Gauss), full industrial temperature range (–40°C to +125°C), and micropower operation - making it the only option qualified for long-life, outdoor-deployed smart meter tamper switches.
Availability
AH1809-P-B is available at Aetrix Electronics and suitable for smart e-meter tamper detection, industrial cabinet door monitoring, and consumer appliance tray position sensing requiring stable component supply, long-lifecycle support, and RoHS-compliant SIP-3L packaging.
Supply support for AH1809-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, specializing in high-reliability, energy-efficient components for industrial, automotive, and consumer markets.
AH1809 belongs to Diodes' Hall-effect sensor product line, engineered specifically for ultra-low-power, high-temperature contactless switching in utility metering, industrial safety interlocks, and white-goods control systems.
FAQ
What is the magnetic polarity requirement for AH1809-P-B operation?
AH1809-P-B is an omnipolar Hall switch: it activates with either a North or South magnetic pole applied perpendicular to the package marking side. No polarity-specific magnet orientation is needed - simplifying mechanical design and reducing assembly errors in high-volume production.
Can AH1809-P-B be used without an external pull-up resistor?
No. The AH1809-P-B has an open-drain output and requires an external pull-up resistor (10 kΩ to 100 kΩ) to a valid logic rail (≤5.5V). Omitting the pull-up results in undefined output state and failure to interface with microcontroller GPIO or PLC inputs.
How does the chopper-stabilized architecture improve performance?
The chopper-stabilized design continuously corrects input-stage offset voltage, reducing Bop/Brp drift to ±15 Gauss over –40°C to +125°C. This eliminates need for system-level calibration and ensures consistent magnetic trip points across temperature extremes and device lifetime.
Is AH1809-P-B compatible with lead-free reflow soldering profiles?
Yes. AH1809-P-B is fully RoHS-compliant, lead-free, and qualified for standard JEDEC J-STD-020D reflow profiles, including peak temperatures up to 260°C. Its SIP-3L package withstands thermal cycling without delamination or parametric shift.
AH1809-P-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-SIP
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Omnipolar Switch
- Technology:
- Hall Effect
- Polarization:
- North Pole, South Pole
- Sensing Range:
- ±18.5mT Trip, ±17mT Release
- Test Condition:
- -40°C ~ 125°C
- Voltage - Supply:
- 2.5V ~ 5.5V
- Current - Supply (Max):
- 6mA
- Current - Output (Max):
- 2.5mA
- Output Type:
- Open Drain
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 3-SIP
AH1809-P-B FAQ
1.How can I place an order for AH1809-P-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AH1809-P-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 AH1809-P-B reliable?
The price and inventory of AH1809-P-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH1809-P-B is usually 5 days.
3.What payment methods are accepted for AH1809-P-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH1809-P-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH1809-P-B?
AH1809-P-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH1809-P-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 AH1809-P-B?
For technical support, including AH1809-P-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH1809-P-B requirements.
6.How does Aetrix verify that AH1809-P-B is sourced from the original manufacturer or authorized distributors?
All AH1809-P-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 AH1809-P-B meets industry standards.
7.What is the process for return or replacement of AH1809-P-B?
All AH1809-P-B units undergo pre-shipment inspection (PSI). If there is an issue with AH1809-P-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 AH1809-P-B part is unused and in its original packaging.
Return procedure for AH1809-P-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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