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Diodes Incorporated AH3572-P-A
- Part No.:
- AH3572-P-A
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP, Formed Leads
- Datasheet:
-
AH3572-P-A.pdf
- Description:
- MAGNETIC SWITCH OMNIPOLAR 3SIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,424
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Product details
Overview
AH3572-P-A from Diodes Incorporated is a high-voltage, high-sensitivity Hall effect omnipolar switch IC designed for non-contact position and proximity sensing in consumer appliances, smart home systems, and industrial equipment. It operates from 3.0V to 28V, features ±20G typical operate point (BOP), ±10G typical release point (BRP), and delivers open-drain output with overcurrent limiting and Zener clamping on supply and output pins.
For engineers reviewing the AH3572-P-A datasheet, AH3572-P-A pinout, AH3572-P-A application, or AH3572-P-A equivalent, key selection considerations include its wide voltage range, chopper-stabilized architecture for temperature stability, omnidirectional magnetic polarity response, and dual-package availability (SOT23 and SIP-3) for mechanical integration flexibility.
Technical Context
The AH3572 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 analog circuitry, enabling stable operation from −40°C to +125°C.
Magnetic sensing is implemented via a Hall element with bipolar threshold detection: output switches low when |B| exceeds BOP (±20G typ), remains latched until |B| falls below BRP (±10G typ), delivering 10G typical hysteresis. The single open-drain output supports external pull-up and includes integrated overcurrent limit (30–55 mA) and Zener clamps on VDD and OUTPUT pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0V to 28V - enables direct interface with 12V/24V industrial and appliance rails without LDO pre-regulation |
| Operate Point (BOP) | ±20G typical - detects weak magnetic fields from small or distant magnets in space-constrained designs |
| Release Point (BRP) | ±10G typical - ensures reliable hysteresis (10G) to prevent chatter near switching thresholds |
| Output Type | Open-drain with 60mA continuous rating - supports flexible pull-up configurations and direct interfacing with MCU GPIOs or logic inputs |
| Start-up Time | 10µs typical - guarantees valid output state within microseconds after VDD reaches 3V, critical for fast-response sensing |
| ESD Rating | HBM > 6kV - provides robust handling during assembly and field operation in unshielded environments |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive-adjacent, industrial control, and HVAC applications |
Pinout & Package
Available in industry-standard SOT23 (3-pin) and SIP-3 (3-pin straight/spread lead) packages. Both packages expose identical pin functions: Pin 1 = VDD (power input), Pin 2 = GND (ground reference), Pin 3 = OUTPUT (open-drain output).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VDD) | Positive supply input | Accepts 3.0–28V DC; includes reverse-blocking diode and Zener clamp for transient protection up to −32V |
| 2 (GND) | Ground reference | Common return path for internal circuits and output load current; must be low-impedance for noise immunity |
| 3 (OUTPUT) | Open-drain output | Sinks up to 60mA; requires external pull-up; includes Zener clamp (28V) and current limiting (30–55mA) |
Key Features
| Feature | Design Value |
|---|---|
| Omnipolar magnetic response | Detects both North and South poles with identical BOP/BRP thresholds - eliminates magnet orientation constraints in mechanical assemblies |
| Chopper-stabilized architecture | Reduces offset drift to <1G/°C - maintains consistent switching points across full temperature range without calibration |
| Integrated supply protection | Reverse-blocking diode + Zener clamp on VDD - withstands −32V reverse battery conditions and 32V transients |
| Noise-immune design | 800kHz chopping frequency + low-pass filtering - rejects RF interference and EMI common in motor-driven appliances |
| Lead-free & green compliance | RoHS 3, halogen- and antimony-free (<900ppm Br/Cl, <1000ppm Sb) - meets global environmental and safety standards |
Applications
| Appliance Door Detection | Industrial Flow Meter Sensing |
|---|---|
Use Scenario: Detecting open/closed state of refrigerator, washing machine, or oven doors using embedded magnets. IC Role / Device Role / Timing Role: Omnipolar Hall switch providing latched digital output indicating door position. Use Value: Eliminates mechanical switches prone to wear; ±20G sensitivity allows use of low-cost ferrite magnets at air gaps up to 3mm. | Use Scenario: Monitoring turbine rotation in water/gas flow meters via magnetic rotor passage. IC Role / Device Role / Timing Role: Magnetic zero-crossing detector generating pulse train proportional to flow rate. Use Value: 10µs start-up time and 3.75µs response delay enable accurate high-speed counting up to 100kHz rotor frequencies. |
| Smart Home Window Sensor | Factory Automation Position Feedback |
Use Scenario: Wireless window/door contact sensors in security or climate-control systems. IC Role / Device Role / Timing Role: Low-power magnetic presence detector triggering BLE/Wi-Fi wake-up events. Use Value: 3.5mA max supply current at +125°C and 28V operation extends battery life in sealed enclosures. | Use Scenario: End-of-travel or homing detection for linear actuators, conveyors, or robotic joints. IC Role / Device Role / Timing Role: Robust position verifier immune to oil, dust, and vibration in harsh factory environments. Use Value: −40°C to +125°C rating and 6kV HBM ESD support direct mounting on motor brackets without shielding. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall effect omnipolar switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL3505W-7 | Narrower voltage range (2.5–24V); lower BOP (±15G typ); no reverse-battery protection | Limited to 24V systems; less suitable for 28V industrial rails or reverse-polarity-prone installations | Select if cost-sensitive and operating strictly within 24V with controlled power architecture |
| US1881EUA-AM | Higher BOP (±30G typ); wider hysteresis (15G); no Zener clamp on output | Better for strong-field environments but less sensitive to weak magnets; lacks output overvoltage protection | Choose when detecting large neodymium magnets at larger air gaps where higher trip thresholds are acceptable |
Compared with AL3505W-7 and US1881EUA-AM, the AH3572-P-A uniquely combines 28V operation, reverse-battery tolerance, and ±20G sensitivity-making it optimal for 24V+ industrial controls and compact consumer devices requiring robustness and fine magnetic resolution.
Availability
AH3572-P-A is available at Aetrix Electronics and suitable for appliance door detection, industrial flow metering, smart home window sensing, and factory automation position feedback requiring stable component supply across extended temperature and voltage ranges.
Supply support for AH3572-P-A 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 ICs, specializing in high-reliability signal integrity, power management, and sensing solutions for industrial, automotive, and consumer markets.
The AH3572 belongs to Diodes' Hall-effect sensor product line, engineered specifically for robust, maintenance-free position and proximity detection in electrically noisy, thermally demanding, and mechanically constrained environments.
FAQ
What is the maximum allowable supply voltage for continuous operation?
The AH3572-P-A is rated for continuous operation from 3.0V to 28V. While its absolute maximum VDD is 32V, this is a transient stress rating only-not intended for sustained use. Operating above 28V risks premature degradation or failure, especially at elevated temperatures.
Does the device require an external capacitor on VDD?
Yes, a 10nF–100nF ceramic decoupling capacitor (CIN) is recommended between VDD and GND. This stabilizes the internal bandgap regulator, suppresses supply noise, and improves RF immunity-particularly critical in motor-driven or switching-power-supply environments.
Can the AH3572-P-A directly drive an LED or relay coil?
No-it provides only an open-drain output with 60mA continuous sink capability. Driving LEDs or relays requires an external pull-up resistor and often a buffer transistor or driver IC, especially for inductive loads. Its output is optimized for interfacing with microcontrollers or logic gates.
How does the omnipolar functionality affect magnet placement in mechanical designs?
Omnipolar operation means the AH3572-P-A activates with either North or South pole facing the marked side of the package-eliminating need to orient magnets directionally. This simplifies assembly, reduces BOM variants, and increases tolerance to magnet misalignment in rotating or sliding mechanisms.
AH3572-P-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-SIP, Formed Leads
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Function:
- Omnipolar Switch
- Technology:
- Hall Effect
- Polarization:
- North Pole, South Pole
- Sensing Range:
- ±3mT Trip, ±0.2mT Release
- Test Condition:
- -40°C ~ 125°C
- Voltage - Supply:
- 3V ~ 28V
- Current - Supply (Max):
- 4mA
- Current - Output (Max):
- 55mA
- Output Type:
- Open Drain
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 3-SIP
AH3572-P-A FAQ
1.How can I place an order for AH3572-P-A through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3572-P-A 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 AH3572-P-A reliable?
The price and inventory of AH3572-P-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH3572-P-A is usually 5 days.
3.What payment methods are accepted for AH3572-P-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3572-P-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3572-P-A?
AH3572-P-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3572-P-A 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 AH3572-P-A?
For technical support, including AH3572-P-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3572-P-A requirements.
6.How does Aetrix verify that AH3572-P-A is sourced from the original manufacturer or authorized distributors?
All AH3572-P-A 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 AH3572-P-A meets industry standards.
7.What is the process for return or replacement of AH3572-P-A?
All AH3572-P-A units undergo pre-shipment inspection (PSI). If there is an issue with AH3572-P-A, 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 AH3572-P-A part is unused and in its original packaging.
Return procedure for AH3572-P-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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