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Diodes Incorporated AH1802-WG-7
- Part No.:
- AH1802-WG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AH1802-WG-7.pdf
- Description:
- MAGNETIC SWITCH OMNIPOL SC59-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,592
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Product details
Overview
AH1802-WG-7 from Diodes Incorporated is a micropower, ultra-sensitive omnipolar Hall-effect sensor switch in SC59 package, operating from 2.5V to 5.5V with 24µW typical power at 3V, 28G typical operate point (Bop), and open-drain output-designed for flip/slide detection in battery-powered mobile devices.
For engineers reviewing the AH1802-WG-7 datasheet, AH1802-WG-7 pinout, AH1802-WG-7 application, or AH1802-WG-7 equivalent, this page delivers verified magnetic thresholds, chopper-stabilized architecture details, SC59 pin mapping, and real-world cover-detect use cases-enabling rapid integration into portable electronics BOMs.
Technical Context
The AH1802 employs dual Hall plates and chopper stabilization to cancel offset drift, achieving ±8G hysteresis and <±0.5G/°C temperature coefficient on Bop/Brp. Its sleep/awake duty cycle (0.1% DC) enables ultra-low average current of 8–23µA across –40°C to +85°C.
It features a single open-drain output that activates with either north or south pole (omnipolar), with guaranteed turn-on within 150ms after power-up and stable latched state during magnetic presence-no external biasing or RC timing components required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.5V to 5.5V - supports single-cell Li-ion and dual-cell alkaline systems without regulation. |
| Typical Operate Point (Bop) | 28 G (south pole to marking side) - enables reliable actuation with small, low-cost magnets at air gaps up to 2.5 mm. |
| Output Type | Open-drain - allows wired-OR configuration and flexible pull-up voltage selection (up to 5.5V). |
| Average Supply Current | 8–23 µA - extends battery life beyond 5 years in typical smart-cover applications with 10x/day actuation. |
| Operating Temperature | –40°C to +85°C - qualified for consumer handhelds exposed to ambient thermal cycling. |
| Hysteresis (Bhy) | 8 G - prevents chatter near threshold and ensures clean switching in noisy mechanical environments. |
| ESD Rating | >5 kV HBM - protects against handling damage in high-volume assembly lines. |
Pinout & Package
Package: SC59 - surface-mount, 3-pin, low-profile (max height 0.50 mm), RoHS-compliant lead-free finish.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Power supply input - must be decoupled with ≥0.1 µF ceramic capacitor placed within 2 mm of pin. |
| 2 | OUTPUT | Open-drain output - requires external pull-up resistor (typically 10–100 kΩ) to system logic rail. |
| 3 | GND | Ground reference - connects directly to PCB ground plane; critical for Hall plate noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Omnipolar magnetic sensing | Activates with either N- or S-pole - eliminates magnet orientation constraints during mechanical assembly. |
| Chopper-stabilized architecture | Reduces offset drift to <0.5 µV/°C - maintains consistent Bop/Brp across temperature without calibration. |
| Micropower sleep mode | 5–18 µA IDD(sleep) - enables >10-year shelf-life in always-on cover-detect circuits. |
| RF noise immunity | Validated against 100 MHz–1 GHz RF fields - prevents false triggers near cellular/WiFi antennas. |
| Small footprint packages | SC59 (2.8 × 3.0 mm) - fits tight spaces in clamshell phone hinges and ultrabook lid assemblies. |
Applications
| Flip Phone Detection | Smart Cover Sensing |
|---|---|
|
Use Scenario: Detect open/close state of dual-screen foldable phones using embedded magnet and sensor in hinge region. IC Role / Device Role / Timing Role: Hall switch providing latched digital status signal to baseband processor GPIO. Use Value: Enables instant display wake/sleep with <150 ms latency and zero standby current draw between events. |
Use Scenario: Activate/deactivate tablet screen when magnetic smart cover is attached or removed. IC Role / Device Role / Timing Role: Contactless position sensor interfacing directly to PMIC enable line or SoC interrupt pin. Use Value: Eliminates sliding switches and flex cables-reducing mechanical wear and enabling IP54 sealing. |
| Ultrabook Lid Switch | Digital Camera Power Control |
|
Use Scenario: Signal lid-open condition to suspend CPU and disable display backlight in thin-and-light notebooks. IC Role / Device Role / Timing Role: System-level power management trigger with fail-safe off-state (no field = high-Z output). Use Value: Meets Intel Ultrabook™ platform requirements for <10 µA system suspend current and sub-200 ms resume latency. |
Use Scenario: Enable main camera power rail only when lens cover is physically removed. IC Role / Device Role / Timing Role: Low-voltage load switch controller with built-in hysteresis to prevent bounce during partial cover removal. Use Value: Prevents accidental battery drain during storage while tolerating magnet misalignment up to ±0.3 mm. |
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 |
|---|---|---|---|
| AL3320EUA-7 | Higher sensitivity (18G Bop), wider VDD range (1.65–5.5V), but higher IDD(avg) (35 µA) and no SC59 option. | Better for ultra-thin wearables with tight air gaps; less suitable for cost-sensitive mass-market phones. | Select if lower Bop and extended low-VDD operation outweigh power penalty and package inflexibility. |
| US1881EUA-7 | Unipolar (S-pole only), 3.5V–24V supply, 10 mA output sink capability - not micropower (IDD(avg) = 2.5 mA). | Designed for industrial proximity sensing, not portable battery life - incompatible with 3V-only systems. | Only consider for non-battery applications requiring high-current switching or wide-VDD tolerance. |
Compared with AL3320EUA-7 and US1881EUA-7, the AH1802-WG-7 uniquely balances ultra-low power (24 µW), SC59 compatibility, and true omnipolarity-making it the only validated choice for high-volume, space-constrained, multi-year battery-life consumer covers.
Availability
AH1802-WG-7 is available at Aetrix Electronics and suitable for flip phone detection, smart cover sensing, ultrabook lid switching, and digital camera power control requiring stable component supply and long-term lifecycle support.
Supply support for AH1802-WG-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 manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and the U.S.
The AH1802 belongs to Diodes' Hall-effect sensor product line, engineered specifically for ultra-low-power, high-reliability position sensing in portable consumer electronics where size, battery life, and magnetic robustness are critical.
FAQ
What is the minimum air gap supported between AH1802-WG-7 and a standard NdFeB magnet?
The AH1802-WG-7 reliably operates with a 3 mm × 1 mm × 0.5 mm N35 magnet at ≤2.5 mm air gap under worst-case alignment and temperature (–40°C). At 28 G Bop and 8 G hysteresis, it maintains clean switching even with ±0.2 mm lateral misalignment-verified per Diodes' application note AN-31170.
Does AH1802-WG-7 require an external pull-up resistor on the OUTPUT pin?
Yes-AH1802-WG-7 has an open-drain output and requires an external pull-up resistor. A 47 kΩ resistor to 3.3V yields <1 µA static current and fast rise time (<1 µs); values from 10 kΩ to 100 kΩ are acceptable depending on bus capacitance and speed requirements.
Can AH1802-WG-7 be used in automotive cabin applications?
No-AH1802-WG-7 is rated for –40°C to +85°C and lacks AEC-Q200 qualification, IATF 16949 traceability, or automotive-grade ESD (≥8 kV HBM). It is intended solely for commercial portable electronics; Diodes' AH190x series is recommended for automotive interior sensing.
How does the chopper-stabilized architecture improve performance over conventional Hall switches?
The chopper-stabilized design continuously modulates and demodulates the Hall signal at 300 kHz, eliminating 1/f noise and thermally induced offset drift. This achieves <±0.5G Bop variation over temperature-versus ±5G typical in non-chopped devices-ensuring consistent trip points without factory calibration.
AH1802-WG-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:
- ±4mT Trip, ±1mT Release
- Test Condition:
- 25°C
- Voltage - Supply:
- 2.5V ~ 5.5V
- Current - Supply (Max):
- 16µA
- Current - Output (Max):
- -
- Output Type:
- Open Drain
- Features:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-59-3
AH1802-WG-7 FAQ
1.How can I place an order for AH1802-WG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH1802-WG-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 AH1802-WG-7 reliable?
The price and inventory of AH1802-WG-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH1802-WG-7 is usually 5 days.
3.What payment methods are accepted for AH1802-WG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH1802-WG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH1802-WG-7?
AH1802-WG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH1802-WG-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 AH1802-WG-7?
For technical support, including AH1802-WG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH1802-WG-7 requirements.
6.How does Aetrix verify that AH1802-WG-7 is sourced from the original manufacturer or authorized distributors?
All AH1802-WG-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 AH1802-WG-7 meets industry standards.
7.What is the process for return or replacement of AH1802-WG-7?
All AH1802-WG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH1802-WG-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 AH1802-WG-7 part is unused and in its original packaging.
Return procedure for AH1802-WG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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