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Diodes Incorporated AH1809-P-A
- Part No.:
- AH1809-P-A
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP, Formed Leads
- Datasheet:
-
AH1809-P-A.pdf
- Description:
- MAGNETIC SWITCH OMNIPOLAR 3SIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,069
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Product details
Overview
AH1809-P-A 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 switches. 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), and delivers open-drain output switching with 15 Gauss typical hysteresis.
For engineers reviewing the AH1809-P-A datasheet, AH1809-P-A pinout, AH1809-P-A application, or AH1809-P-A equivalent, key selection considerations include its SIP-3L package footprint, -40°C to +125°C operating range, 24 µW ultra-low power consumption at 3V, and bipolar magnetic field response without polarity dependency.
Technical Context
The AH1809 employs chopper-stabilized architecture with dual Hall plates to suppress offset drift and deliver stable magnetic switching across temperature. Its internal circuitry enables reliable operation under mechanical stress and RF noise, with guaranteed hysteresis of 5–20 Gauss over full temperature range.
It integrates wake/sleep cycling with 75–125 µs awake time and 75–125 ms period, achieving micropower performance while maintaining fast magnetic response. The output remains latched off in zero-field condition and activates only when |B| exceeds Bop, releasing when |B| falls below Brp.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.5V to 5.5V - Enables direct integration into 3V and 5V battery or rail-powered systems without regulation. |
| Average Supply Current | 8–16 µA @ 3V, 25°C - Supports >10-year battery life in smart meter tamper switches. |
| Operate Point (Bop) | ±100 to ±165 Gauss - Low sensitivity avoids false triggers from ambient fields; requires deliberate magnet placement. |
| Hysteresis (Bhy) | 5–20 Gauss - Prevents chatter during slow magnetic transitions near threshold. |
| Output Type | Open-drain - Allows flexible pull-up to any voltage ≤5.5V and wired-OR interfacing. |
| Operating Temperature | -40°C to +125°C - Qualified for outdoor smart meter enclosures and industrial control panels. |
| ESD Rating | 6 kV HBM - Robust against handling and system-level ESD events in production and field service. |
Pinout & Package
The AH1809-P-A is supplied in SIP-3L (Straight Lead) package, a 3-pin through-hole package with 2.51–2.57 mm height, 14.0–15.0 mm body length, and 1.40–1.60 mm lead pitch. Pin 1 = VDD, Pin 2 = GND, Pin 3 = OUTPUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VDD) | Positive supply input | Accepts 2.5–5.5V; internal regulator powers analog core and digital logic. |
| 2 (GND) | Ground reference | Common return path for supply and output sink current; must be low-impedance. |
| 3 (OUTPUT) | Open-drain output | Sinks up to 2.5 mA; requires external pull-up; active-low magnetic presence indicator. |
Key Features
| Feature | Design Value |
|---|---|
| Omnipolar magnetic response | Switches on with either North or South pole - eliminates magnet orientation constraints in mechanical assembly. |
| Chopper-stabilized architecture | ±15 Gauss max Bop drift over -40°C to +125°C - ensures consistent trip points without calibration. |
| Micropower sleep mode | 5–10 µA IDD(sleep) @ 3V - reduces quiescent load during idle periods in battery-critical applications. |
| RF noise immunity | Validated against common industrial EMI sources - prevents spurious triggering in motor-driven or wireless environments. |
| Lead-free & green construction | <900 ppm Br/Cl, <1000 ppm Sb - meets RoHS 2 and environmental compliance for global metering deployments. |
Applications
| Smart E-Meter Tamper Detection | Industrial Door Position Sensing |
|---|---|
|
Use Scenario: Detect unauthorized meter cover removal using embedded magnet and reed-switch replacement. IC Role / Device Role / Timing Role: Omnipolar Hall switch providing latched open-drain signal indicating cover displacement. Use Value: Eliminates mechanical wear and contact bounce; operates reliably for >15 years in sealed meter housing. |
Use Scenario: Monitor cabinet door status in programmable logic controller (PLC) I/O modules. IC Role / Device Role / Timing Role: Proximity sensor converting physical door closure into digital logic-level signal. Use Value: SIP-3L through-hole mounting withstands vibration; -40°C to +125°C rating supports harsh factory environments. |
| Home Appliance Lid Switch | Level Detection in Water Meters |
|
Use Scenario: Confirm washing machine lid closure before spin cycle initiation. IC Role / Device Role / Timing Role: Low-power Hall switch enabling safety interlock with minimal battery drain. Use Value: 24 µW power budget allows integration into coin-cell-powered appliance remotes or sensors. |
Use Scenario: Detect float magnet position inside ultrasonic or mechanical water meter housings. IC Role / Device Role / Timing Role: Magnetic level indicator generating pulse output per rotation or displacement step. Use Value: ±130 Gauss Bop tolerance accommodates magnet aging and gap variation over 20+ year service life. |
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 |
|---|---|---|---|
| ALLEGRO A3263LLHLT-T | Higher sensitivity (±35 Gauss Bop); 3.3V fixed supply; SOT-23 package | Better for weak-field or tight-gap designs; less suitable for high-noise or wide-air-gap use cases | Select when magnet strength is limited and PCB space is constrained; avoid where ambient field immunity is critical |
| MELEXIS US1881EUA-ABA-000-SP | Wider supply range (2.7–24V); higher output drive (50 mA); TO-92 package | Supports direct solenoid/LED driving; requires larger footprint and higher quiescent current (120 µA) | Choose for direct-load interfacing or multi-voltage systems; not optimal for ultra-low-power battery nodes |
Compared with A3263LLHLT-T and US1881EUA-ABA-000-SP, the AH1809-P-A uniquely balances ultra-low power (8–16 µA), robust hysteresis (5–20 Gauss), and SIP-3L through-hole reliability-making it optimal for long-life, noise-immune, mechanically rugged metering and industrial position sensing.
Availability
AH1809-P-A is available at Aetrix Electronics and suitable for smart e-meter tamper protection, industrial door position monitoring, and home appliance lid interlocks requiring stable component supply across multi-year production cycles.
Supply support for AH1809-P-A 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 integrated circuits, specializing in high-reliability power management, signal integrity, and sensing solutions for industrial and consumer markets.
The AH1809 belongs to Diodes' Hall-effect sensor product line, engineered specifically for ultra-low-power, high-stability contactless switching in utility metering, appliance safety, and industrial automation systems.
FAQ
What is the magnetic polarity requirement for AH1809-P-A activation?
The AH1809-P-A is an omnipolar Hall switch: it activates with either a North or South magnetic pole applied perpendicular to the package marking side. No magnet polarity orientation is required during mechanical integration, simplifying assembly and reducing field-installation errors in smart meter or appliance applications.
Can AH1809-P-A operate directly from a lithium coin cell?
Yes. With 8–16 µA average supply current at 3V and 2.5V minimum operating voltage, the AH1809-P-A supports direct operation from CR2032 (3V) or even partially discharged Li-MnO₂ cells down to 2.5V, enabling decade-long battery life in tamper-detection nodes without voltage boosting circuitry.
Does AH1809-P-A require an external capacitor?
Yes. A 10 nF to 100 nF bypass capacitor (CIN) between VDD and GND is recommended per the datasheet to stabilize supply and improve RF noise immunity. This capacitor mitigates transient coupling from nearby motors or wireless transceivers, preventing false triggering in industrial or smart-home environments.
Is the SIP-3L package of AH1809-P-A compatible with wave soldering?
Yes. The SIP-3L package is qualified for standard wave soldering profiles per J-STD-020. Its straight-lead configuration and 2.51–2.57 mm height allow reliable through-hole insertion and wetting. Peak temperature exposure must remain ≤260°C for ≤10 seconds, consistent with Diodes' packaging specifications in DS35523 Rev. 4-2.
AH1809-P-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-SIP, Formed Leads
- Packaging:
- Cut Tape (CT)
- 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-A FAQ
1.How can I place an order for AH1809-P-A through Aetrix?
Please submit a Request for Quotation (RFQ) for AH1809-P-A 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-A reliable?
The price and inventory of AH1809-P-A 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-A is usually 5 days.
3.What payment methods are accepted for AH1809-P-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH1809-P-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH1809-P-A?
AH1809-P-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH1809-P-A 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-A?
For technical support, including AH1809-P-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH1809-P-A requirements.
6.How does Aetrix verify that AH1809-P-A is sourced from the original manufacturer or authorized distributors?
All AH1809-P-A 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-A meets industry standards.
7.What is the process for return or replacement of AH1809-P-A?
All AH1809-P-A units undergo pre-shipment inspection (PSI). If there is an issue with AH1809-P-A, 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-A part is unused and in its original packaging.
Return procedure for AH1809-P-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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