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Diodes Incorporated AH1806-Z-7
- Part No.:
- AH1806-Z-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- SOT-553
- Datasheet:
-
AH1806-Z-7.pdf
- Description:
- MAGNETIC SWITCH OMNIPOLAR SOT553
- Quantity:
- Payment:
- Shipping:
Inventory:3,170
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Product details
Overview
AH1806-Z-7 from Diodes Incorporated is a high-sensitivity, micropower omnipolar Hall-effect switch IC in SOT553 package, designed for magnetic position detection in battery-powered systems. It operates from 2.5V to 5.5V, consumes only 8–16 µA average supply current at 3V, and switches its open-drain output with either North or South magnetic pole - enabling tamper detection in smart meters and lid-closed sensing in portable electronics.
For engineers reviewing the AH1806-Z-7 datasheet, AH1806-Z-7 pinout, AH1806-Z-7 application, or AH1806-Z-7 equivalent, key selection criteria include its 15–45 Gauss operate point (Bop), chopper-stabilized architecture for <10 Gauss hysteresis, -40°C to +85°C industrial temperature range, and SOT553 footprint compatibility with space-constrained PCB layouts.
Technical Context
The AH1806-Z-7 integrates dual Hall plates and chopper stabilization to cancel offset drift, delivering stable switching thresholds across temperature and supply voltage variations. Its sleep/awake duty cycle (0.1% typical) and 75–125 µs awake time enable ultra-low-power operation in intermittent-sensing applications.
It features a single open-drain output with 0.1–0.3 V saturation voltage at 1 mA sink, 5–28 µA sleep current over full temperature range, and 6 kV HBM ESD rating - supporting robust, maintenance-free deployment in consumer and industrial environments without external protection circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.5V to 5.5V - supports direct connection to Li-ion, 3.3V, or 5V rails without regulation. |
| Average Supply Current | 8–40 µA - enables >10-year battery life in coin-cell-powered devices sampling once per second. |
| Operate Point (Bop) | ±15–45 Gauss - detects weak magnetic fields from small ferrite magnets at air gaps up to 3 mm. |
| Hysteresis (Bhy) | 5–10 Gauss - prevents chatter during slow field transitions near threshold. |
| Output Type | Open-drain - allows wired-OR configuration and flexible pull-up to any logic rail (≤5.5V). |
| Operating Temperature | -40°C to +85°C - qualified for indoor industrial and home appliance environments. |
| ESD Rating | 6 kV HBM - withstands handling and assembly without additional ESD protection. |
Pinout & Package
SOT553 package: 1.2 mm × 1.6 mm × 0.6 mm low-profile surface-mount outline with exposed thermal pad (not electrically connected); pin 1 (NC), pin 2 (GND), pin 3 (NC), pin 4 (VDD), pin 5 (OUTPUT).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | No Connection | Internally unconnected; may be left floating or tied to GND for mechanical stability. |
| Pin 2 | GND | Reference ground for Hall sensor and output driver; must be low-impedance path to system ground plane. |
| Pin 3 | No Connection | Internally unconnected; no electrical function; avoid routing signals beneath this pad. |
| Pin 4 | VDD | Power input (2.5–5.5V); requires 10–100 nF decoupling capacitor placed ≤2 mm from pin. |
| Pin 5 | OUTPUT | Open-drain N-channel output; sinks up to 2.5 mA; requires external pull-up resistor (10–100 kΩ). |
Key Features
| Feature | Design Value |
|---|---|
| Omnipolar magnetic sensing | Detects both North and South poles - eliminates magnet orientation dependency in mechanical assemblies. |
| Chopper-stabilized architecture | Reduces thermal drift of Bop/Brp to <±0.5 Gauss/°C - maintains consistent trip points across -40°C to +85°C. |
| Micropower sleep mode | 5–28 µA sleep current - extends battery life in wireless sensors and IoT endpoints with infrequent wake cycles. |
| RF noise immunity | Validated against 100 MHz–1 GHz RF fields - operates reliably near Wi-Fi/Bluetooth antennas without shielding. |
| Lead-free & green construction | Halogen- and antimony-free (<900 ppm Br+Cl, <1000 ppm Sb) - meets RoHS 3 and JEDEC MSL-1 requirements. |
Applications
| Smart Meter Tamper Detection | Lid/Cover Position Sensing |
|---|---|
Use Scenario: Detect unauthorized access to utility meter enclosures using embedded magnet and reed-switch replacement. IC Role / Device Role / Timing Role: Omnipolar Hall switch providing tamper event flag via open-drain interrupt to microcontroller. Use Value: Eliminates mechanical wear and contact bounce; operates reliably after 100k+ actuations with no degradation in Bop stability. |
Use Scenario: Sense closed/open state of laptop lid, tablet cover, or appliance door. IC Role / Device Role / Timing Role: Low-power proximity detector triggering system suspend/resume on magnetic field presence change. Use Value: 8–16 µA average current enables >5-year CR2032 battery life in always-on lid-sense mode. |
| Portable Display Switch | Liquid Level Monitoring |
Use Scenario: Enable/disable display backlight or touch controller when detachable keyboard or folio cover is attached. IC Role / Device Role / Timing Role: Magnetic proximity sensor interfacing directly to GPIO with internal hysteresis preventing false triggers. Use Value: ±15–45 Gauss sensitivity accommodates low-cost ferrite magnets at 2–4 mm air gap - reducing BOM cost vs. reed switches. |
Use Scenario: Monitor fluid level in tanks or reservoirs using float-mounted magnet and fixed Hall sensor. IC Role / Device Role / Timing Role: Contactless level threshold detector with fail-safe off-state when no field present. Use Value: No moving contacts or seals required - suitable for corrosive or sterile liquid environments where mechanical switches fail. |
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 Bop (30–60 Gauss), 5.5V max VDD, SC70-5 package - larger footprint and 3× higher sleep current (30 µA typ). | Less suitable for ultra-thin designs or coin-cell lifetime targets below 3 years. | Select if higher magnetic immunity or legacy Allegro design reuse is required. |
| MELEXIS US5881LUA-AAA-000-RE | Lower power (3 µA avg), but bipolar-only (North-only activation); SOT23-3 package - no NC pins. | Requires magnet polarity alignment; incompatible with bidirectional mounting in rotating or flipping assemblies. | Select only when magnet orientation is strictly controlled and lowest possible current is critical. |
Compared with A3212LLHLT-T and US5881LUA-AAA-000-RE, the AH1806-Z-7 uniquely balances ultra-low power, true omnipolarity, and SOT553 miniaturization - making it optimal for compact, battery-sensitive, and mechanically flexible magnetic sensing deployments.
Availability
AH1806-Z-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 RoHS-compliant sourcing.
Supply support for AH1806-Z-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 Taiwan and China.
The AH1806 belongs to Diodes' Hall-effect sensor 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 minimum magnetic field strength required to activate the AH1806-Z-7?
The AH1806-Z-7 activates at a magnetic flux density ≥15 Gauss (1.5 mT) for South pole and ≤−15 Gauss for North pole at 25°C and 3V supply. Minimum operate point drops to 10 Gauss under worst-case conditions (−40°C, 2.5V), ensuring reliable switching across full operating range.
Can the AH1806-Z-7 drive an LED directly?
No. The AH1806-Z-7 has an open-drain output rated for 2.5 mA sink current and 0.3 V saturation voltage at 1 mA. Driving even a low-current LED (typically requiring ≥5 mA and ≥1.8 V forward drop) exceeds its capability; an external NPN transistor or logic buffer is required.
Is a decoupling capacitor mandatory for stable operation?
Yes. A 10–100 nF ceramic capacitor must be placed within 2 mm of the VDD and GND pins to suppress supply transients and ensure proper chopper stabilization. Omission causes erratic switching, increased jitter, and potential failure to latch valid magnetic events.
Does the SOT553 package of AH1806-Z-7 include thermal pad exposure?
No. The SOT553 package for AH1806-Z-7 has no exposed thermal pad. Its thermal performance relies on copper traces connected to pins 2 (GND) and 4 (VDD); recommended PCB layout uses ≥25 mm² of 1-oz copper pour under the device for junction-to-board conduction.
AH1806-Z-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-553
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Omnipolar Switch
- Technology:
- Hall Effect
- Polarization:
- North Pole, South Pole
- Sensing Range:
- ±4.5mT Trip, ±4mT Release
- Test Condition:
- 25°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:
- SOT-553
AH1806-Z-7 FAQ
1.How can I place an order for AH1806-Z-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH1806-Z-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 AH1806-Z-7 reliable?
The price and inventory of AH1806-Z-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH1806-Z-7 is usually 5 days.
3.What payment methods are accepted for AH1806-Z-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH1806-Z-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH1806-Z-7?
AH1806-Z-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH1806-Z-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 AH1806-Z-7?
For technical support, including AH1806-Z-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH1806-Z-7 requirements.
6.How does Aetrix verify that AH1806-Z-7 is sourced from the original manufacturer or authorized distributors?
All AH1806-Z-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 AH1806-Z-7 meets industry standards.
7.What is the process for return or replacement of AH1806-Z-7?
All AH1806-Z-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH1806-Z-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 AH1806-Z-7 part is unused and in its original packaging.
Return procedure for AH1806-Z-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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