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Diodes Incorporated AH1801-SNG-7
- Part No.:
- AH1801-SNG-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 6-UDFN Exposed Pad
- Datasheet:
-
AH1801-SNG-7.pdf
- Description:
- MAG SWITCH OMNIPOLAR DFN2020-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,469
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Product details
Overview
AH1801-SNG-7 from Diodes Incorporated is a micropower, ultra-sensitive Hall effect switch with inverted output logic, designed for battery-powered portable electronics. It operates from 2.5V to 5.5V, consumes only 8–27 µA average supply current at 3V, and features ±40–60 Gauss operate point (Bop) and 10–30 Gauss hysteresis (Bhy) for reliable magnetic detection in low-power hand-held devices.
For engineers reviewing the AH1801-SNG-7 datasheet, AH1801-SNG-7 pinout, AH1801-SNG-7 application, or AH1801-SNG-7 equivalent, key selection factors include its DFN2020-6 package footprint, inverted output-on-no-field behavior, chopper-stabilized architecture for drift suppression, and verified operation across –40°C to +85°C industrial temperature range.
Technical Context
The AH1801-SNG-7 integrates dual Hall plates with offset cancellation and a chopper-stabilized amplifier to suppress thermal drift and mechanical stress effects. Its internal latch ensures stable output state retention until magnetic field drops below release point (Brp), enabling robust switching in noisy environments.
It uses an active-low open-drain output with 0.1–0.3 V on-state voltage at 1 mA load and <1 µA off-state leakage. Power management includes ultra-low 5–18 µA disable-mode current and 3–9 mA enable-mode current, supporting duty-cycled wake-up schemes with 75–150 µs awake time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.5 V to 5.5 V - compatible with single-cell Li-ion and alkaline battery systems |
| Average Supply Current | 8–27 µA at 3 V - enables multi-year battery life in always-on sensing applications |
| Operate Point (Bop) | ±40–60 Gauss - detects weak magnetic fields from small magnets or low-strength actuation |
| Hysteresis (Bhy) | 10–30 Gauss - prevents chatter near threshold and improves noise immunity |
| Output Type | Inverted open-drain - pulls low when magnet present; high-impedance otherwise, requiring external pull-up |
| Operating Temperature | –40°C to +85°C - qualified for consumer and industrial portable equipment environments |
| ESD Rating | >5 kV HBM - protects against electrostatic discharge during handling and assembly |
Pinout & Package
AH1801-SNG-7 is housed in a 6-pin DFN2020-6 package (2.0 mm × 2.0 mm × 0.6 mm), with exposed thermal pad and pin 1 marked by a dot. The package supports automated optical alignment and provides enhanced thermal performance over 3-pin variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Positive power supply input - must be decoupled with 10–100 nF capacitor near pin |
| 2 | NC | No connection - internally unconnected; leave floating or tie to GND per layout guidelines |
| 3 | Output | Open-drain output - sinks current when magnet detected; requires external pull-up resistor (10–100 kΩ) |
| 4 | NC | No connection - internally unconnected; leave floating or tie to GND per layout guidelines |
| 5 | GND | Ground reference - connect directly to low-impedance ground plane for noise immunity |
| 6 | NC | No connection - internally unconnected; leave floating or tie to GND per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | 8–27 µA average current enables >5-year battery life in coin-cell-powered IoT sensors |
| Chopper Stabilization | Eliminates offset drift over temperature and time, maintaining consistent Bop/Brp across –40°C to +85°C |
| Inverted Output Logic | Output defaults high (open-drain) without magnet - simplifies interface with microcontroller GPIO interrupt inputs |
| North/South Pole Sensitivity | Detects either polarity - allows flexible mechanical design with magnet orientation freedom |
| RF Noise Immunity | Validated against common wireless interference sources - suitable for cellular and Bluetooth-enabled handhelds |
Applications
| Smartphone Lid Detection | Wireless Headset Case Sensing |
|---|---|
Use Scenario: Detect flip cover closure or clamshell lid position in smartphones. IC Role / Device Role / Timing Role: Hall switch providing proximity-based system wake/sleep control via GPIO interrupt. Use Value: Enables zero-power standby mode with sub-30 µA quiescent current, extending standby battery life by >40% vs. non-chopper alternatives. | Use Scenario: Sense charging case lid open/closed state in true wireless stereo (TWS) earbud systems. IC Role / Device Role / Timing Role: Magnetic presence detector triggering battery charging enable/disable and status reporting. Use Value: Supports ultra-small form factor with DFN2020-6 footprint and eliminates need for mechanical switches prone to wear. |
| PDA Stylus Dock Detection | Cordless Phone Base Station Presence |
Use Scenario: Confirm stylus insertion into docking cradle on legacy PDAs or modern digital notepads. IC Role / Device Role / Timing Role: Low-power magnetic switch signaling dock engagement to initiate charging or data sync. Use Value: Reliable detection at <60 Gauss ensures compatibility with miniature neodymium magnets embedded in compact stylus tips. | Use Scenario: Verify handset placement on base station for charging and RF link initialization in DECT cordless phones. IC Role / Device Role / Timing Role: Hall sensor enabling automatic power-on and pairing sequence upon magnetic coupling. Use Value: Inverted logic eliminates external inverter; 10–30 Gauss hysteresis prevents false triggers from vibration or stray fields. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall effect switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ALLEGRO A1104LUA-T | Higher 3.5 mA supply current; 3-pin SOT-23 package; no inverted output | Requires external inverter for same logic; less suited for multi-year battery life | Select if higher magnetic sensitivity (15–25 Gauss Bop) is required and power budget allows |
| MELEXIS US5881LUA-ABA-00-BU | 3.3 V fixed supply; 2.5 µA typical IDD; DFN1616-4 package; non-inverted output | Needs level-shifting or logic inversion; smaller footprint but different pinout | Choose for lowest power in 3.3 V systems where inverted logic can be implemented externally |
Compared with A1104LUA-T and US5881LUA-ABA-00-BU, AH1801-SNG-7 uniquely combines inverted logic, DFN2020-6 packaging, and sub-30 µA operation-making it optimal for space-constrained, long-life battery applications where signal polarity alignment reduces BOM count.
Availability
AH1801-SNG-7 is available at Aetrix Electronics and suitable for smartphone lid detection, TWS earbud case sensing, PDA stylus docking, and cordless phone base station presence applications requiring stable component supply and RoHS-compliant green packaging.
Supply support for AH1801-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-reliability, energy-efficient components for consumer, industrial, and computing markets.
AH1801 belongs to Diodes' Hall-effect sensor product line, engineered specifically for ultra-low-power magnetic switching in portable battery-operated devices with stringent size and longevity requirements.
FAQ
What is the function of the NC pins on AH1801-SNG-7?
Pins 2, 4, and 6 are no-connect terminals-internally unconnected and electrically isolated. Diodes Incorporated recommends leaving them floating or tying them to GND for mechanical stability and ESD protection, per their DFN2020-6 layout guidelines. They do not affect functionality or biasing.
Does AH1801-SNG-7 require an external pull-up resistor?
Yes. AH1801-SNG-7 features an open-drain output that sinks current when activated. A pull-up resistor (10–100 kΩ) between VDD and the Output pin is mandatory to establish a valid high logic level when the output is inactive. Without it, the output remains undefined.
Is AH1801-SNG-7 still recommended for new designs?
No. Per Diodes Incorporated's ordering information, AH1801-SNG-7 carries "NRND" (Not Recommended for New Design) status. It remains available for legacy support, but designers should consider newer alternatives like AH1808 or APX803 series for new projects requiring extended lifecycle assurance.
How does chopper stabilization improve AH1801-SNG-7 performance?
Chopper stabilization dynamically cancels amplifier input offset voltage by modulating the signal path at high frequency and demodulating it post-amplification. This reduces temperature-induced drift and 1/f noise, ensuring stable operate/release points (Bop/Brp) across –40°C to +85°C and over device lifetime.
AH1801-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:
- ±6mT 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
AH1801-SNG-7 FAQ
1.How can I place an order for AH1801-SNG-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH1801-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 AH1801-SNG-7 reliable?
The price and inventory of AH1801-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 AH1801-SNG-7 is usually 5 days.
3.What payment methods are accepted for AH1801-SNG-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH1801-SNG-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH1801-SNG-7?
AH1801-SNG-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH1801-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 AH1801-SNG-7?
For technical support, including AH1801-SNG-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH1801-SNG-7 requirements.
6.How does Aetrix verify that AH1801-SNG-7 is sourced from the original manufacturer or authorized distributors?
All AH1801-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 AH1801-SNG-7 meets industry standards.
7.What is the process for return or replacement of AH1801-SNG-7?
All AH1801-SNG-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH1801-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 AH1801-SNG-7 part is unused and in its original packaging.
Return procedure for AH1801-SNG-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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