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Diodes Incorporated AH3582-SA-7
- Part No.:
- AH3582-SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AH3582-SA-7.pdf
- Description:
- MAG SWITCH OMNIPOLAR SOT23 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:6,950
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Product details
Overview
AH3582-SA-7 from Diodes Incorporated is a high-voltage, high-sensitivity Hall effect omnipolar switch IC with internal pull-up resistor, designed for proximity and position sensing in industrial appliances and personal care devices. It operates from 3.0V to 28V, features ±40G typical operate point (BOP), ±25G typical release point (BRP), and -40°C to +125°C temperature range.
For engineers reviewing the AH3582-SA-7 datasheet, AH3582-SA-7 pinout, AH3582-SA-7 application, or AH3582-SA-7 equivalent, this device supports robust contactless switching in wide-supply industrial environments where magnetic hysteresis, ESD immunity (>6kV HBM), and chopper-stabilized thermal stability are critical selection criteria.
Technical Context
The AH3582 employs chopper-stabilized architecture with dynamic offset cancellation to minimize switch-point drift across temperature and supply voltage. Its internal bandgap regulator provides temperature-compensated biasing for consistent BOP/BRP performance from -40°C to +125°C.
It integrates reverse-blocking diode, Zener clamps on VDD and OUTPUT pins, over-current limiting (30–55 mA), and an internally pulled-up open-drain output. Magnetic actuation is omnidirectional-triggered by either South or North pole above ±40G threshold at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0V to 28V - enables direct interface with 12V/24V industrial rails without external regulation |
| Operate Point (BOP) | ±40G typical - ensures reliable activation with low-strength magnets or increased air gaps |
| Release Point (BRP) | ±25G typical - provides 15G hysteresis to prevent chatter near threshold |
| Output Type | Open-drain with internal 10–18 kΩ pull-up - simplifies PCB layout and reduces external component count |
| ESD Rating | HBM > 6 kV - withstands handling and system-level electrostatic discharge in factory and field environments |
| Start-up Time | 10 µs typical - supports fast-response timing-critical detection in motor commutation or flow metering |
| Operating Temperature | -40°C to +125°C - qualified for under-hood, motor control, and sealed-appliance applications |
Pinout & Package
Package: SOT23 - surface-mount, 3-pin, lead-free, RoHS-compliant package with 2.4 mm × 1.3 mm footprint and 1.1 mm height; optimized for automated assembly and space-constrained designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VDD) | Power Supply Input | Accepts 3.0–28V DC; includes reverse-blocking diode and Zener clamp for transient protection |
| 2 (GND) | Ground Reference | Common return path for internal circuitry and output stage; must be low-impedance for noise immunity |
| 3 (OUTPUT) | Open-Drain Output | Internally pulled up; sinks current when active (low-state); includes over-current limit and Zener clamp |
Key Features
| Feature | Design Value |
|---|---|
| Omnipolar magnetic sensitivity | Responds to either South or North pole ≥ ±40G - eliminates magnet orientation constraints in mechanical assemblies |
| Chopper-stabilized architecture | Reduces thermal drift of BOP/BRP to ±20G over full temperature range - ensures stable switching across ambient extremes |
| Integrated protection network | Reverse-blocking diode + dual Zener clamps (VDD & OUTPUT) - eliminates need for external TVS or polarity protection |
| Internal pull-up resistor | 10–18 kΩ, temperature-stable - removes external resistor, saves board area, and guarantees defined idle state |
| High RF noise immunity | Validated per IEC 61000-4-3 - maintains operation in electrically noisy environments like motor drives and power supplies |
Applications
| Industrial Position Sensing | Appliance Door Detection |
|---|---|
|
Use Scenario: Detecting piston position in pneumatic cylinders or valve stem travel in process control systems. IC Role / Device Role / Timing Role: Omnipolar Hall switch providing digital on/off feedback synchronized to mechanical motion. Use Value: Enables precise end-of-travel confirmation without physical contact, reducing wear and maintenance in harsh industrial settings. |
Use Scenario: Monitoring open/closed status of washing machine or dishwasher doors. IC Role / Device Role / Timing Role: Proximity sensor triggering safety interlock and user interface logic upon door closure. Use Value: Ensures power cutoff during door opening and prevents cycle interruption - meets IEC 60335 safety requirements. |
| Flow Metering | Contactless Toggle Switch |
|
Use Scenario: Counting rotations of a magnetic impeller in water/gas meters. IC Role / Device Role / Timing Role: Pulse generator delivering clean, jitter-free edges for accurate volumetric calculation. Use Value: Delivers sub-millisecond response (3.75 µs delay) and stable hysteresis to reject vibration-induced false counts. |
Use Scenario: Replacing mechanical pushbuttons in handheld personal care devices (e.g., electric toothbrushes, shavers). IC Role / Device Role / Timing Role: Solid-state toggle actuator responding to magnet movement behind plastic housing. Use Value: Eliminates tactile wear-out and ingress paths; IPX7 sealing enabled by fully encapsulated, non-perforated front panel. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall effect switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Melexis US1881 | Lower supply range (2.7–24V); ±30G BOP; no internal pull-up - requires external resistor | Suitable for battery-powered portable devices but lacks 28V tolerance and integrated pull-up | Select when lower quiescent current (2.5mA typ.) and smaller footprint (TSOT23) are prioritized over supply headroom |
| Allegro A1120EUA-T | Bipolar (not omnipolar); ±35G BOP; 3.5–24V range; no Zener clamp on output | Requires magnet polarity alignment; less robust against supply transients in industrial 24V systems | Choose only if existing design uses bipolar actuation and legacy compatibility outweighs protection and flexibility benefits |
Compared with US1881 and A1120EUA-T, the AH3582-SA-7 delivers wider voltage margin, true omnipolar operation, and integrated protection - making it optimal for new 24V industrial and appliance designs where reliability and bill-of-materials reduction are primary goals.
Availability
AH3582-SA-7 is available at Aetrix Electronics and suitable for industrial position sensing, appliance door detection, flow metering, and contactless toggle switch applications requiring stable component supply across extended temperature and voltage ranges.
Supply support for AH3582-SA-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 power management, signal integrity, and sensing solutions for industrial and consumer markets.
The AH3582 belongs to Diodes' Hall-effect sensor product line, engineered specifically for robust, maintenance-free proximity and position detection in demanding 12V/24V systems where long-term stability and ESD resilience are mandatory.
FAQ
What is the function of the internal pull-up resistor in AH3582-SA-7?
The internal pull-up resistor (10–18 kΩ) ensures the OUTPUT pin defaults to a known high-impedance high state when inactive, eliminating the need for an external resistor. This simplifies PCB layout, reduces component count, and guarantees consistent idle voltage across temperature and supply variations without external tuning.
Can AH3582-SA-7 operate reliably at 28V continuously?
Yes - the AH3582-SA-7 is rated for continuous operation from 3.0V to 28V per its Recommended Operating Conditions. Its absolute maximum VDD rating of 32V is a transient stress limit; sustained 28V operation is fully supported and validated across the -40°C to +125°C temperature range.
How does the chopper-stabilized architecture improve performance?
Chopper stabilization dynamically cancels offset voltage in the Hall element and amplifier chain, reducing BOP/BRP drift to ±20G over -40°C to +125°C. This ensures consistent magnetic thresholds across temperature swings and supply fluctuations - critical for repeatable position detection in unregulated environments.
Is AH3582-SA-7 compatible with SOT23-3 footprints from other manufacturers?
Yes - AH3582-SA-7 uses standard JEDEC SOT23-3 dimensions (2.4 mm × 1.3 mm × 1.1 mm) with pin 1 marked by device top-side marking. Its thermal and electrical characteristics are validated for reflow soldering per J-STD-020, ensuring drop-in compatibility with existing SOT23-3 assembly processes.
AH3582-SA-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:
- Obsolete
- Function:
- Omnipolar Switch
- Technology:
- Hall Effect
- Polarization:
- North Pole, South Pole
- Sensing Range:
- ±6mT Trip, ±1mT Release
- Test Condition:
- -40°C ~ 125°C
- Voltage - Supply:
- 3V ~ 28V
- Current - Supply (Max):
- 4mA
- Current - Output (Max):
- 55mA
- Output Type:
- Push-Pull
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
AH3582-SA-7 FAQ
1.How can I place an order for AH3582-SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3582-SA-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 AH3582-SA-7 reliable?
The price and inventory of AH3582-SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH3582-SA-7 is usually 5 days.
3.What payment methods are accepted for AH3582-SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3582-SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3582-SA-7?
AH3582-SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3582-SA-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 AH3582-SA-7?
For technical support, including AH3582-SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3582-SA-7 requirements.
6.How does Aetrix verify that AH3582-SA-7 is sourced from the original manufacturer or authorized distributors?
All AH3582-SA-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 AH3582-SA-7 meets industry standards.
7.What is the process for return or replacement of AH3582-SA-7?
All AH3582-SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH3582-SA-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 AH3582-SA-7 part is unused and in its original packaging.
Return procedure for AH3582-SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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