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Diodes Incorporated AH3524-P-A
- Part No.:
- AH3524-P-A
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP, Formed Leads
- Datasheet:
-
AH3524-P-A.pdf
- Description:
- HALL LATCH SWITCH SIP-3 AMMO 4K
- Quantity:
- Payment:
- Shipping:
Inventory:3,402
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Product details
Overview
AH3524-P-A from Diodes Incorporated is a high-voltage, high-sensitivity Hall-effect omnipolar switch IC designed for contactless position and proximity sensing in industrial and smart home systems. It operates from 3.0V to 28V, features ±40G typical operate point (BOP), ±25G typical release point (BRP), open-drain output with 30–55mA current limit, and functions across –40°C to +125°C.
For engineers reviewing the AH3524-P-A datasheet, AH3524-P-A pinout, AH3524-P-A application, or AH3524-P-A equivalent, this device supports robust magnetic sensing in high-noise, wide-voltage environments where temperature stability, ESD immunity (8kV HBM), and reverse-polarity protection are critical design requirements.
Technical Context
The AH3524-P-A uses chopper-stabilized architecture with dynamic offset cancellation to minimize switch-point drift over temperature and supply voltage. Its internal bandgap regulator provides temperature-compensated biasing for consistent BOP/BRP performance across –40°C to +125°C.
It integrates reverse-blocking diode and Zener clamps on both VDD and OUTPUT pins, enabling operation in harsh industrial environments with transient voltage exposure up to 32V (transient rating) and reverse supply tolerance of –18V.
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 |
| Omnipolar Operate Point (BOP) | ±20G to ±60G typ - detects either North or South pole, simplifying mechanical mounting in rotating or sliding assemblies |
| Output Type | Open-drain with 30–55mA current limit - supports flexible pull-up selection and inherent short-circuit protection |
| Response Time | 4µs typical - ensures fast detection of rapidly moving targets such as motor commutation or valve actuation |
| ESD Rating | 8kV HBM - eliminates need for external ESD protection in consumer and industrial PCB layouts |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive-adjacent and factory-floor applications |
| Power-On Time | 10µs typical - guarantees valid output state within microseconds after power stabilization |
Pinout & Package
Package: SIP-3 (Ammo Pack), 3-pin single-inline package with gull-wing leads, optimized for through-hole mounting and high-reliability industrial assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Power supply input with integrated reverse-blocking diode and Zener clamp - tolerates –18V reverse bias and transients up to 32V |
| 2 | GND | Ground reference for internal regulator and output stage - shared return path for magnetic sensor and output driver |
| 3 | OUTPUT | Open-drain output with internal current limiting and Zener clamp - sinks up to 55mA and withstands 32V off-state voltage |
Key Features
| Feature | Design Value |
|---|---|
| Omnipolar magnetic detection | Eliminates magnet polarity orientation constraints during mechanical integration - reduces assembly time and field failure risk |
| Chopper-stabilized architecture | Reduces thermal drift of BOP/BRP to <±0.5G/°C - maintains switching accuracy across full industrial temperature range |
| Zener clamps on VDD and OUTPUT | Prevents latch-up or damage from inductive kickback or supply surges - removes need for external TVS diodes |
| High ESD immunity (8kV HBM) | Withstands electrostatic discharge during handling and system integration - improves first-pass yield in automated assembly |
| 3.0V to 28V supply range | Operates directly from unregulated 12V/24V bus - avoids cost and board space of dedicated LDO or DC-DC converter |
Applications
| Home Appliance Door Detection | Industrial Flow Meter Sensing |
|---|---|
Use Scenario: Detecting open/closed state of washing machine or dishwasher doors using embedded magnets. IC Role / Device Role / Timing Role: Omnipolar Hall switch providing logic-level signal to MCU upon magnet proximity - no polarity alignment required during assembly. Use Value: Enables reliable, maintenance-free door interlock with ±40G sensitivity and 125°C ambient tolerance for sealed enclosure operation. | Use Scenario: Monitoring turbine rotation in water/gas flow meters via magnetic target on impeller shaft. IC Role / Device Role / Timing Role: High-speed magnetic pulse generator feeding microcontroller timer input - 4µs response ensures accurate RPM calculation at >10,000 RPM. Use Value: Delivers stable zero-crossing detection across 3.0–28V supply variation and 8kV ESD events common in utility meter environments. |
| Smart HVAC Damper Position | Factory Automation Limit Switch |
Use Scenario: Verifying fully open/closed position of air dampers in commercial HVAC ductwork. IC Role / Device Role / Timing Role: Proximity sensor interfacing with 24V PLC input - open-drain output pulls down to <0.4V at 20mA load. Use Value: Supports direct 24V control rail connection with built-in reverse-polarity and surge protection - reduces external component count by 3 parts. | Use Scenario: End-of-travel detection for robotic arm linear actuators in packaging lines. IC Role / Device Role / Timing Role: Robust position confirmation node in noisy industrial Ethernet/IP networks - immune to RF interference per datasheet testing. Use Value: Maintains switching hysteresis (15G typ) across –40°C to +125°C - prevents chatter during thermal cycling in unconditioned factory settings. |
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 |
|---|---|---|---|
| Melexis US1881 | Lower supply range (2.5–24V); ±30G BOP; no reverse-blocking diode on VDD | Requires external reverse-protection diode in 24V+ systems; less robust against supply transients | Select when cost sensitivity outweighs transient immunity requirements and supply stays ≤24V |
| Allegro A1120EUA-T | Wider BOP range (±25G to ±100G); 3.5–24V supply; no Zener clamp on output | Lacks output Zener protection - needs external clamp for inductive load switching | Choose for ultra-high-sensitivity applications where magnetic field strength is weak and external protection is acceptable |
Compared with US1881 and A1120EUA-T, the AH3524-P-A uniquely combines 28V operation, integrated reverse-blocking diode, dual Zener clamps, and 8kV ESD in a SIP-3 package - making it optimal for unregulated 24V industrial systems requiring minimal external protection.
Availability
AH3524-P-A is available at Aetrix Electronics and suitable for industrial flow meters, smart HVAC damper controls, and factory automation limit switches requiring stable component supply across extended temperature and voltage ranges.
Supply support for AH3524-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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal devices for industrial, computing, and consumer markets.
The AH3524 belongs to Diodes' Hall-effect sensor product line, engineered specifically for high-reliability, wide-supply contactless switching in environments demanding extended temperature operation, ESD resilience, and transient immunity.
FAQ
What is the difference between AH3522 and AH3524?
The AH3524 has higher magnetic sensitivity than the AH3522: its typical operate point (BOP) is ±40G versus ±20G for the AH3522, and its typical release point (BRP) is ±25G versus ±10G. This makes the AH3524 better suited for applications with weaker magnetic fields or larger air gaps, while both share identical electrical specifications, package options, and operating voltage range.
Can AH3524-P-A be used with a 3.3V microcontroller I/O pin?
Yes - the AH3524-P-A's open-drain output is compatible with 3.3V logic when paired with a 3.3V pull-up resistor. Its output on-voltage is ≤0.4V at 20mA, ensuring solid low-level signaling. However, VDD must be supplied separately within 3.0–28V; the device does not regulate or level-shift its supply to match MCU voltage.
Does AH3524-P-A require an external capacitor on VDD?
Yes - a 10nF to 100nF ceramic decoupling capacitor (CIN) is recommended between VDD and GND per the datasheet. This stabilizes the internal bandgap regulator, improves noise immunity, and ensures reliable startup within the specified 10µs power-on time, especially in electrically noisy industrial environments.
Is AH3524-P-A qualified for automotive applications?
No - AH3524-P-A is not AEC-Q100 qualified. While it operates from –40°C to +125°C and includes robust protection features, Diodes explicitly states that automotive-grade versions require separate qualification, PPAP capability, and IATF 16949 manufacturing - none of which apply to the standard AH3524-P-A part number.
AH3524-P-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-SIP, Formed Leads
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Technology:
- -
- Polarization:
- -
- Sensing Range:
- -
- Test Condition:
- -
- Voltage - Supply:
- -
- Current - Supply (Max):
- -
- Current - Output (Max):
- -
- Output Type:
- -
- Features:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 3-SIP
AH3524-P-A FAQ
1.How can I place an order for AH3524-P-A through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3524-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 AH3524-P-A reliable?
The price and inventory of AH3524-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 AH3524-P-A is usually 5 days.
3.What payment methods are accepted for AH3524-P-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3524-P-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3524-P-A?
AH3524-P-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3524-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 AH3524-P-A?
For technical support, including AH3524-P-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3524-P-A requirements.
6.How does Aetrix verify that AH3524-P-A is sourced from the original manufacturer or authorized distributors?
All AH3524-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 AH3524-P-A meets industry standards.
7.What is the process for return or replacement of AH3524-P-A?
All AH3524-P-A units undergo pre-shipment inspection (PSI). If there is an issue with AH3524-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 AH3524-P-A part is unused and in its original packaging.
Return procedure for AH3524-P-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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