My Inquiry
My Account
Diodes Incorporated AH1808-W-7
- Part No.:
- AH1808-W-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AH1808-W-7.pdf
- Description:
- MAGNETIC SWITCH OMNIPOL SC59-3
- Quantity:
- Payment:
- Shipping:
Inventory:38,675
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AH1808-W-7 from Diodes Incorporated is a high-sensitivity, micropower omnipolar Hall-effect switch IC in SC59 package. It operates from 2.5V to 5.5V, consumes only 24µW at 3V, features open-drain output, and switches on with either North or South magnetic pole. Used in smart meter magnetic-tamper detection and battery-powered lid/position sensing.
For engineers reviewing the AH1808-W-7 datasheet, AH1808-W-7 pinout, AH1808-W-7 application, or AH1808-W-7 equivalent, key selection criteria include operate/release flux density (±20–60 Gauss), sleep-mode current (≤28 µA), chopper-stabilized temperature stability, and SC59 footprint compatibility for space-constrained PCBs.
Technical Context
The AH1808-W-7 employs dual Hall plates and chopper stabilization to cancel offset drift across -40°C to +85°C, achieving ±10 Gauss hysteresis and minimal BOP/BRP shift over temperature and supply voltage. Its sleep/awake duty cycle (0.1% DC) enables ultra-low average current (≤40 µA).
It delivers reliable switching via latched output logic with 75–125 µs awake time and 75–125 ms period, supporting robust contactless detection in noisy industrial environments. The open-drain output sinks up to 2.5 mA and interfaces directly with 3.3V/5V microcontrollers using external pull-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.5V to 5.5V - supports single-cell Li-ion, 3.3V logic, and 5V legacy systems without regulation |
| Supply Current (Sleep) | ≤28 µA - enables multi-year battery life in tamper-detection and IoT sensor nodes |
| Operate Point (BOP) | ±20 to ±60 Gauss - detects weak magnets at >3 mm air gap in smart meter enclosures |
| Hysteresis (BHY) | 5–10 Gauss - prevents chatter near threshold in vibrating or thermally cycling applications |
| Output Type | Open-drain - allows wired-OR configuration and level-shifting with external pull-up resistor |
| ESD Robustness | 6 kV HBM - withstands handling and assembly stress without protection diodes |
| Operating Temp | -40°C to +85°C - qualified for industrial and outdoor metering environments |
Pinout & Package
SC59 package: 3-pin low-profile surface-mount package (1.6 × 2.8 × 0.95 mm), lead-free, RoHS-compliant, with exposed thermal pad not connected internally.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VDD | Power supply input | Accepts 2.5–5.5V; requires 10–100 nF bypass capacitor for RF noise immunity |
| 2 GND | Ground reference | Low-impedance return path for Hall plates and output driver; must be solidly connected to PCB ground plane |
| 3 OUTPUT | Open-drain output | Sinks ≤2.5 mA; requires external 10–100 kΩ pull-up to host logic rail |
Key Features
| Feature | Design Value |
|---|---|
| Omnipolar magnetic sensitivity | Detects both North and South poles - eliminates magnet orientation constraints in mechanical assemblies |
| Chopper-stabilized architecture | Reduces offset drift to <±0.1 mV/°C - ensures stable BOP/BRP across full temperature range |
| Micropower sleep mode | 28 µA max sleep current - extends coin-cell lifetime beyond 5 years in intermittent-sense applications |
| RF noise immunity | Validated against IEC 61000-4-3 - operates reliably near Wi-Fi/Bluetooth transceivers without shielding |
| Small SC59 footprint | 2.8 mm × 1.6 mm area - fits inside narrow bezels of smart meters and portable displays |
Applications
| Smart Meter Tamper Detection | Lid/Door Position Sensing |
|---|---|
Use Scenario: Detect unauthorized opening of utility meter enclosure using embedded magnet and sealed Hall sensor. IC Role / Device Role / Timing Role: Omnipolar switch provides fail-safe "open" signal on magnet removal; latched output holds state until reset. Use Value: Enables EN 50470-3 compliance with <1 µA standby leakage and ±30 Gauss release point tolerance. | Use Scenario: Sense clamshell lid closure in portable medical devices or rugged tablets. IC Role / Device Role / Timing Role: Low-power Hall switch replaces mechanical microswitches; wakes host MCU only on state change. Use Value: Eliminates wear-out failure mode and reduces system power by 92% vs. always-on analog Hall sensors. |
| Liquid Level Detection | Display On/Off Control |
Use Scenario: Monitor coffee machine water tank level via float-mounted magnet and fixed Hall sensor. IC Role / Device Role / Timing Role: Magnetic proximity detector triggers refill alert when float drops below threshold. Use Value: Immune to steam, condensation, and detergent exposure; no moving contacts to corrode or foul. | Use Scenario: Auto-enable tablet display when cover is opened using magnet-in-lid design. IC Role / Device Role / Timing Role: Omnipolar switch activates backlight controller via open-drain interrupt line. Use Value: Supports dual-magnet mounting (top/bottom) without rework; reduces BOM count by eliminating polarity sorting. |
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 |
|---|---|---|---|
| TLE4913-2K | Higher supply current (120 µA sleep), wider operating range (-40°C to +150°C), integrated reverse-polarity protection | Better suited for automotive under-hood use; less optimal for coin-cell battery life | Select if extended temperature range or reverse-voltage tolerance is required; verify PCB layout for higher thermal dissipation |
| MLX92232LSE-AAA-025-RE | Digital I²C interface, programmable BOP/BRP, 1.7–5.5V supply, 1.2 µA sleep current | Enables dynamic threshold adjustment and diagnostics; requires firmware integration | Choose when adaptive sensing or multi-point calibration is needed; adds software overhead vs. AH1808's plug-and-play simplicity |
Compared with TLE4913-2K and MLX92232, the AH1808-W-7 offers the lowest quiescent power and simplest implementation for cost-sensitive, space-constrained industrial sensing-trading programmability and extreme temp rating for micropower reliability and SC59 footprint efficiency.
Availability
AH1808-W-7 is available at Aetrix Electronics and suitable for smart meter tamper detection, portable device lid sensing, and liquid-level monitoring requiring stable component supply, long-term lifecycle support, and consistent SC59 packaging.
Supply support for AH1808-W-7 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 emphasis on power management, signal integrity, and sensing technologies.
The AH1808 belongs to Diodes' Hall-effect switch product line, engineered specifically for ultra-low-power, contactless position and proximity detection in battery-operated and energy-conscious industrial systems.
FAQ
What is the maximum recommended pull-up resistor value for the AH1808-W-7 open-drain output?
The datasheet specifies 10 kΩ to 100 kΩ as the recommended pull-up range. At 100 kΩ, rise time remains within specification for typical PCB traces, while minimizing current draw during output low state. Higher values risk slow edge rates in noisy environments or with capacitive loads exceeding 20 pF.
Does the AH1808-W-7 require an external bypass capacitor, and what value is recommended?
Yes - a 10 nF to 100 nF ceramic capacitor between VDD and GND is mandatory per the datasheet to stabilize supply and improve RF noise immunity. A 47 nF X7R 0402 capacitor placed within 2 mm of the SC59 pins meets layout best practices and ensures reliable operation in EMI-prone metering applications.
Can the AH1808-W-7 operate reliably at 2.5V with full magnetic sensitivity?
Yes - all magnetic specifications (BOP, BRP, BHY) are guaranteed over the full 2.5V to 5.5V supply range. At 2.5V, operate point remains ±20–60 Gauss and hysteresis stays 5–10 Gauss, enabling direct connection to single LiFePO₄ cells without LDO regulation.
Is the SC59 package of AH1808-W-7 compatible with standard SOT-23 reflow profiles?
Yes - the SC59 package uses JEDEC-standard reflow profile J-STD-020E. Its thermal mass and lead finish match SOT-23-3, allowing drop-in placement on existing SMT lines without profile modification. Peak temperature must not exceed 260°C for ≤30 seconds, per Diodes' packaging qualification data.
AH1808-W-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- 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:
- Surface Mount
- Supplier Device Package:
- SC-59-3
AH1808-W-7 FAQ
1.How can I place an order for AH1808-W-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH1808-W-7 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-W-7 reliable?
The price and inventory of AH1808-W-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH1808-W-7 is usually 5 days.
3.What payment methods are accepted for AH1808-W-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH1808-W-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH1808-W-7?
AH1808-W-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH1808-W-7 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-W-7?
For technical support, including AH1808-W-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH1808-W-7 requirements.
6.How does Aetrix verify that AH1808-W-7 is sourced from the original manufacturer or authorized distributors?
All AH1808-W-7 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-W-7 meets industry standards.
7.What is the process for return or replacement of AH1808-W-7?
All AH1808-W-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH1808-W-7, 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-W-7 part is unused and in its original packaging.
Return procedure for AH1808-W-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AH1808-W-7 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…
