My Inquiry
My Account
Diodes Incorporated AH1808-P-A
- Part No.:
- AH1808-P-A
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP, Formed Leads
- Datasheet:
-
AH1808-P-A.pdf
- Description:
- MAGNETIC SWITCH OMNIPOLAR 3SIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,767
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AH1808-P-A from Diodes Incorporated is a high-sensitivity, micropower omnipolar Hall-effect switch IC designed for magnetic tamper detection in smart meters and position sensing in battery-powered consumer devices. It operates from 2.5V to 5.5V, consumes only 24µW at 3V, features an open-drain output activated by either North or South pole, and delivers ±10G hysteresis with BOP of ±40G typical.
For engineers reviewing the AH1808-P-A datasheet, AH1808-P-A pinout, AH1808-P-A application, or AH1808-P-A equivalent, this device is selected for ultra-low-power, contactless switching in space-constrained, thermally variable environments where magnetic polarity independence and chopper-stabilized temperature stability are critical.
Technical Context
The AH1808 employs dual Hall plates and chopper stabilization to cancel offset drift, enabling stable operate/release points across −40°C to +85°C. Its sleep/awake duty cycle (0.1% typical) and 75–125µs awake time minimize average current while maintaining fast response.
It uses internal latch logic and a low-impedance output driver capable of sinking 2.5mA. The single open-drain output requires external pull-up; no internal biasing is provided. Magnetic sensitivity is defined relative to package marking side, with symmetric bipolar thresholds (±20G to ±60G).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5V to 5.5V - supports direct connection to Li-ion, 3.3V, or 5V rails without regulation. |
| Average Supply Current | 8–16 µA @ +25°C, 3V - enables >10-year battery life in coin-cell–powered metering applications. |
| Operate Point (BOP) | ±40 G typical - detects weak magnets at ≥2mm air gap in compact enclosures. |
| Hysteresis (BHY) | 10 G typical - prevents chatter near threshold in vibrating or noisy mechanical systems. |
| Output Type | Open-drain, 2.5mA sink - interfaces directly with microcontroller GPIO or logic-level inputs using standard 10kΩ pull-up. |
| ESD Rating | HBM > 6 kV - survives handling and assembly without additional protection circuitry. |
| Operating Temperature | −40°C to +85°C - qualified for outdoor smart meter and industrial appliance deployment. |
Pinout & Package
Package: SIP-3 (Ammo Pack), 3-pin straight-lead surface-mount package with 1.5mm body height and 4.1mm × 3.0mm footprint. Pin 1 = VDD, Pin 2 = GND, Pin 3 = OUTPUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VDD) | Power supply input | Accepts 2.5–5.5V; must be decoupled with 10–100nF capacitor per datasheet recommendation. |
| 2 (GND) | Ground reference | Common return path for Hall sensor, logic, and output driver; requires low-impedance PCB connection. |
| 3 (OUTPUT) | Open-drain output | Sinks up to 2.5mA when active; requires external pull-up resistor (10–100kΩ) to define VOH. |
Key Features
| Feature | Design Value |
|---|---|
| Omnipolar magnetic activation | Responds identically to North or South pole - eliminates magnet orientation dependency during assembly. |
| Chopper-stabilized architecture | Reduces thermal drift of BOP/BRP to <±0.1G/°C - maintains consistent switching over full temperature range. |
| Micropower sleep mode | IDD(sleep) ≤28 µA max across temp/voltage - enables multi-year operation on CR2032 batteries. |
| RF noise immunity | Validated against common ISM band interference - no external filtering required in typical home appliance EMI environments. |
| Lead-free & green compliance | Fully RoHS 3 (2015/863/EU), halogen- and antimony-free - meets global environmental compliance mandates. |
Applications
| Smart Meter Tamper Detection | Lid/Door Position Sensing |
|---|---|
|
Use Scenario: Detect unauthorized opening of utility meter housing using embedded magnet and reed-switch replacement. IC Role / Device Role / Timing Role: Omnipolar Hall switch providing tamper event flag to meter MCU via open-drain interrupt line. Use Value: Eliminates mechanical wear and contact bounce; operates reliably after 10+ years in sealed outdoor enclosure. |
Use Scenario: Sense closure state of laptop lid or tablet cover to trigger sleep/wake transitions. IC Role / Device Role / Timing Role: Low-power proximity detector interfacing directly with PMIC or application processor GPIO. Use Value: 24µW active power enables always-on sensing without measurable impact on standby battery drain. |
| Liquid Level Detection | Industrial Proximity Switching |
|
Use Scenario: Monitor coffee level in commercial brewer reservoir using float-mounted magnet. IC Role / Device Role / Timing Role: Contactless level threshold detector driving optocoupler or logic input in control board. Use Value: Immune to steam, condensation, and detergent exposure-no moving contacts to corrode or fail. |
Use Scenario: Replace mechanical limit switches on automated conveyor gate actuators. IC Role / Device Role / Timing Role: Solid-state position feedback element in PLC I/O subsystem with 2.5mA sink capability. Use Value: Withstands vibration, dust, and repeated cycling (>10⁷ operations) without degradation. |
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 A3212LLHLT-T | Higher supply current (120µA avg), wider BOP range (±25G to ±95G), SC59-only packaging. | Better suited for higher-speed, higher-noise factory automation; less optimal for coin-cell longevity. | Select if wider magnetic sensitivity tolerance or legacy SC59 footprint is required. |
| MELEXIS US1881EUA-ABA-000-REEL | Lower hysteresis (5G typ), integrated reverse-polarity protection, SOT23-3 package. | Preferred for automotive-grade environments requiring reverse-battery resilience and tighter BOP/BRP matching. | Select if system-level reverse-voltage risk exists or SOT23-3 board space is constrained. |
Compared with A3212LLHLT-T and US1881EUA-ABA-000-REEL, the AH1808-P-A offers the lowest quiescent power and widest operating voltage range among SIP-3 packaged omnipolar switches, making it optimal for long-life, cost-sensitive metering and portable consumer designs where polarity flexibility and thermal stability are prioritized over speed or reverse-protection.
Availability
AH1808-P-A is available at Aetrix Electronics and suitable for smart meter tamper detection, lid/cover position sensing, liquid level monitoring, and industrial proximity switching requiring stable component supply across extended product lifecycles.
Supply support for AH1808-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 analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and the Americas.
The AH1808 belongs to Diodes' Hall-effect sensor product line, engineered specifically for ultra-low-power, contactless switching in battery-operated and environmentally demanding applications such as utility metering and home appliances.
FAQ
What is the magnetic polarity requirement for AH1808-P-A activation?
The AH1808-P-A is an omnipolar Hall switch: it activates with either a North or South pole oriented toward the marked side of the package. No magnet polarity orientation is required during assembly, simplifying mechanical integration and reducing field failure risk due to incorrect magnet placement.
Can AH1808-P-A operate directly from a 3.3V microcontroller I/O rail?
Yes - the AH1808-P-A operates from 2.5V to 5.5V and draws only 8–16µA average current at 3V. Its open-drain output is compatible with 3.3V logic levels when paired with a 3.3V pull-up resistor, enabling direct interface without level-shifting circuitry.
Does AH1808-P-A require an external capacitor on VDD?
Yes - a 10nF to 100nF ceramic capacitor is recommended between VDD and GND per the datasheet to stabilize supply and improve RF noise immunity. This capacitor must be placed within 2mm of the VDD pin to maintain chopper stabilization integrity and prevent false triggering.
Is AH1808-P-A qualified for industrial temperature range operation?
Yes - the AH1808-P-A is fully specified and tested over −40°C to +85°C ambient temperature. Its chopper-stabilized architecture ensures BOP and BRP drift remains within ±10G across this range, meeting requirements for smart meters, appliances, and factory equipment deployed in uncontrolled environments.
AH1808-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:
- ±6mT Trip, ±5mT Release
- Test Condition:
- -40°C ~ 85°C
- Voltage - Supply:
- 2.5V ~ 5.5V
- Current - Supply (Max):
- 16µA
- Current - Output (Max):
- 2.5mA
- Output Type:
- Open Drain
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 3-SIP
AH1808-P-A FAQ
1.How can I place an order for AH1808-P-A through Aetrix?
Please submit a Request for Quotation (RFQ) for AH1808-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 AH1808-P-A reliable?
The price and inventory of AH1808-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 AH1808-P-A is usually 5 days.
3.What payment methods are accepted for AH1808-P-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH1808-P-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH1808-P-A?
AH1808-P-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH1808-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 AH1808-P-A?
For technical support, including AH1808-P-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH1808-P-A requirements.
6.How does Aetrix verify that AH1808-P-A is sourced from the original manufacturer or authorized distributors?
All AH1808-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 AH1808-P-A meets industry standards.
7.What is the process for return or replacement of AH1808-P-A?
All AH1808-P-A units undergo pre-shipment inspection (PSI). If there is an issue with AH1808-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 AH1808-P-A part is unused and in its original packaging.
Return procedure for AH1808-P-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AH1808-P-A Tags
-
TCS40DLR,LF
Toshiba Semiconductor and Storage
-
DRV5032FBDBZR
Texas Instruments
-
DRV5032FADBZR
Texas Instruments
-
AH1912-FA-7
Diodes Incorporated
-
AH1913-W-7
Diodes Incorporated
-
AH1911-W-7
Diodes Incorporated
-
TLI49631MXTSA1
Infineon Technologies
-
SM453R
Honeywell Sensing and Productivity Solutions
-
MLX90248ESE-EBA-000-RE
Melexis Technologies NV
-
MLX92213ELD-AAA-000-RE
Melexis Technologies NV
-
TLE4913HTSA1
Infineon Technologies
-
US5781ESE-AAA-000-RE
Melexis Technologies NV
Tech Hub
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
