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Diodes Incorporated AH1802-SNG-7
- Part No.:
- AH1802-SNG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 6-UDFN Exposed Pad
- Datasheet:
-
AH1802-SNG-7.pdf
- Description:
- MAGNETIC SWITCH OMNIPOLAR 6DFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,937
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Product details
Overview
AH1802-SNG-7 from Diodes Incorporated is a micropower, ultra-sensitive omnipolar Hall-effect sensor switch in U-DFN2020-6 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/cover detection in battery-powered portable electronics.
For engineers reviewing the AH1802-SNG-7 datasheet, AH1802-SNG-7 pinout, AH1802-SNG-7 application, or AH1802-SNG-7 equivalent, this device supports contactless switching in space-constrained designs requiring low quiescent current, magnetic hysteresis stability, and robust RF noise immunity across –40°C to +85°C.
Technical Context
The AH1802 employs dual Hall plates with chopper-stabilized architecture to cancel offset drift and maintain consistent operate/release points (Bop = ±28 G typ, Brp = ±20 G typ) over temperature and supply voltage. Its sleep/awake duty cycle (0.1% typical) enables ultra-low average current (8–23 µA).
It features a single open-drain output with VOL = 0.3 V max at 1 mA load, internal latch logic, and automatic sampling every ~150 ms (Tperiod). The device enters awake mode only during magnetic sampling, minimizing power consumption without external control signals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.5 V to 5.5 V - supports single-cell Li-ion and 3.3 V/5 V system rails without regulation. |
| Typical Supply Current (Awake) | 3 µA at +25°C - enables >1-year battery life in intermittent-sense applications like smart covers. |
| Operate Point (Bop) | ±28 G (typ) - detects weak magnetic fields from small neodymium magnets at ≥2 mm air gap. |
| Hysteresis (Bhy) | 8 G (typ) - prevents output chatter near threshold in noisy mechanical environments. |
| Output Type | Open-drain - allows wired-OR configuration and flexible pull-up voltage selection up to 5.5 V. |
| Operating Temperature | –40°C to +85°C - qualified for consumer portable equipment including ultrabooks and tablets. |
| ESD Rating | >6 kV HBM - withstands handling and assembly stress in high-volume manufacturing. |
Pinout & Package
U-DFN2020-6 package: 2.0 mm × 2.0 mm × 0.6 mm body, wettable flank, no lead, RoHS/Green compliant. Pin 1 (NC) and Pin 3 (NC) are unconnected; recommended to tie externally to GND for mechanical stability and ESD path integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | No Connection | Internally floating; external GND connection improves thermal dissipation and ESD robustness. |
| Pin 2 | GND | Reference ground for Hall sensing and output driver; must be low-impedance for stable operation. |
| Pin 3 | No Connection | Internally floating; same recommendation as Pin 1 for PCB layout consistency. |
| Pin 4 | VDD | Power input; decoupling capacitor (100 nF) required within 2 mm of this pin for noise immunity. |
| Pin 5 | No Connection | Internally floating; ties to same GND recommendation for symmetry and manufacturability. |
| Pin 6 | OUTPUT | Open-drain output; requires external pull-up (10–100 kΩ) to compatible logic rail (≤5.5 V). |
Key Features
| Feature | Design Value |
|---|---|
| Omnipolar magnetic sensitivity | Detects either north or south pole - eliminates magnet orientation constraints in mechanical assembly. |
| Chopper-stabilized architecture | Reduces Bop drift to <±0.5 G/°C - maintains reliable switching across full temperature range without calibration. |
| Micropower sleep mode | 5–18 µA IDD(sleep) - extends battery life in always-on cover-detect functions without wake-up controller. |
| RF noise immunity | Validated against common cellular band interference - prevents false triggers in smartphones and tablets. |
| Low-profile DFN packaging | 0.6 mm max height - fits under thin display bezels and inside compact hinge mechanisms. |
Applications
| Flip Phone Lid Detection | Smart Cover Presence Sensing |
|---|---|
Use Scenario: Detects opening/closing of clamshell phone lid using embedded magnet and PCB-mounted AH1802-SNG-7 near hinge. IC Role / Device Role / Timing Role: Hall-effect switch providing digital on/off signal to baseband processor GPIO upon magnetic field crossing Bop/Brp thresholds. Use Value: Enables instant screen wake/sleep with <150 ms latency after magnet motion, consuming <24 µW average power. |
Use Scenario: Detects attachment/detachment of magnet-equipped folio cover on tablet or ultrabook. IC Role / Device Role / Timing Role: Contactless proximity switch triggering system suspend/resume via interrupt-capable I/O line. Use Value: Eliminates mechanical microswitch wear-out and supports IP54-sealed enclosures with no aperture. |
| Ultrabook Display Lid Switch | Digital Camera Power Toggle |
Use Scenario: Mounted on laptop mainboard beneath top case, activated by magnet in display bezel when lid closes. IC Role / Device Role / Timing Role: System-level lid close sensor feeding EC (Embedded Controller) to initiate display off and S3 suspend sequence. Use Value: Meets Intel Ultrabook™ platform requirements for <5 µA standby current and sub-200 ms response time. |
Use Scenario: Integrated into compact digital camera body to enable power-on when lens barrel extends and magnet passes sensor. IC Role / Device Role / Timing Role: Standalone on/off actuator replacing slide switch, interfacing directly with PMIC enable input. Use Value: Reduces BOM count by one mechanical component and improves dust/moisture resistance in sealed housing. |
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 |
|---|---|---|---|
| AL3320E-7 | Higher Bop (±40 G typ), 5.5 V max VDD, same U-DFN2020-6 footprint but no chopper stabilization. | Less stable over temperature; requires tighter magnet placement tolerance in production. | Select if higher magnetic immunity is needed and thermal drift can be managed via mechanical design. |
| TLE4913-2K | Bipolar (not omnipolar), 5 V only, SOIC-8 package, 3.5 mA awake current - 1000× higher than AH1802. | Requires separate north/south magnet routing; unsuitable for ultra-low-power portable use. | Choose only for industrial systems where power budget exceeds 100 µA and board space permits SOIC-8. |
Compared with AL3320E-7 and TLE4913-2K, AH1802-SNG-7 uniquely combines omnipolarity, chopper stabilization, and sub-10 µA sleep current in a 2 mm × 2 mm DFN-making it the only viable option for battery-critical, size-constrained consumer cover-detect designs.
Availability
AH1802-SNG-7 is available at Aetrix Electronics and suitable for flip phone lid detection, smart cover presence sensing, ultrabook display lid switching, and digital camera power toggle applications requiring stable component supply and long-term lifecycle support.
Supply support for AH1802-SNG-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, specializing in high-efficiency power management, signal integrity, and sensing solutions for consumer, computing, and industrial markets.
AH1802 belongs to Diodes' Hall-effect sensor product line, engineered specifically for ultra-low-power, contactless switching in portable electronics where battery life, miniaturization, and magnetic reliability are critical.
FAQ
What is the magnetic polarity requirement for AH1802-SNG-7 operation?
The AH1802-SNG-7 is an omnipolar Hall switch: it activates with either a north or south magnetic pole presented to the marked surface. Its operate point is ±28 G (typ), meaning it responds identically to both polarities-eliminating magnet orientation constraints during assembly and enabling simplified mechanical design.
Can AH1802-SNG-7 drive an LED directly?
No. AH1802-SNG-7 has an open-drain output rated for 1 mA sink current (VOL ≤ 0.3 V), insufficient to drive most indicator LEDs. It must interface with a GPIO or logic buffer; an external N-channel MOSFET or bipolar transistor is required for LED or relay loads.
Is AH1802-SNG-7 pin-compatible with other Diodes Hall switches in U-DFN2020-6?
No. While AH1802-SNG-7 uses U-DFN2020-6, its pinout (NC-GND-NC-VDD-NC-OUTPUT) differs from Diodes' AH1812 (VDD-OUTPUT-GND) and AH1822 (VDD-GND-OUTPUT) in the same package-requiring unique PCB layout and not supporting drop-in replacement.
Does AH1802-SNG-7 require an external capacitor?
Yes. A 100 nF ceramic decoupling capacitor must be placed between VDD and GND within 2 mm of the device. This is mandatory to suppress supply noise and ensure stable chopper operation-omission causes erratic switching or increased IDD(avg) due to repeated wake cycles.
AH1802-SNG-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-UDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- U-DFN2020-6
AH1802-SNG-7 FAQ
1.How can I place an order for AH1802-SNG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH1802-SNG-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-SNG-7 reliable?
The price and inventory of AH1802-SNG-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-SNG-7 is usually 5 days.
3.What payment methods are accepted for AH1802-SNG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH1802-SNG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH1802-SNG-7?
AH1802-SNG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH1802-SNG-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-SNG-7?
For technical support, including AH1802-SNG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH1802-SNG-7 requirements.
6.How does Aetrix verify that AH1802-SNG-7 is sourced from the original manufacturer or authorized distributors?
All AH1802-SNG-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-SNG-7 meets industry standards.
7.What is the process for return or replacement of AH1802-SNG-7?
All AH1802-SNG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH1802-SNG-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-SNG-7 part is unused and in its original packaging.
Return procedure for AH1802-SNG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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