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Diodes Incorporated AH3524A-P-A
- Part No.:
- AH3524A-P-A
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP, Formed Leads
- Datasheet:
-
AH3524A-P-A.pdf
- Description:
- HALL OMNIPOLAR SWITCH SIP-3 AMMO
- Quantity:
- Payment:
- Shipping:
Inventory:2,215
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Product details
Overview
AH3524A-P-A from Diodes Incorporated is a high-voltage, high-sensitivity Hall-effect omnipolar switch IC with internal pullup 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 delivers <0.4V output on-voltage at 20mA load - enabling robust contactless switching in harsh environments.
For engineers reviewing the AH3524A datasheet, AH3524A pinout, AH3524A application, or AH3524A equivalent, this device supports design of open/close detection, flow metering, and level sensing systems requiring wide supply range, temperature-stable magnetic thresholds, and integrated overcurrent protection without external pullup components.
Technical Context
The AH3524A uses chopper-stabilized architecture with dynamic offset cancellation to suppress thermal drift and mechanical stress effects, delivering ±15G hysteresis (BHY) and <4µs response time across –40°C to +125°C. Its internal bandgap regulator supplies temperature-compensated bias to analog blocks, ensuring stable BOP/BRP performance independent of VDD variation.
It integrates reverse-blocking diode and Zener clamps on both VDD and OUTPUT pins, plus 30–55mA programmable output current limiting. The internally pulled-up output switches low when |B| exceeds BOP (South or North pole), latching until |B| falls below BRP - enabling reliable bipolar magnetic actuation without polarity alignment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0V to 28V - supports direct connection to 24V industrial rails without external regulation |
| Operate Point (BOP) | ±40G typical - detects weak magnetic fields from small or distant magnets |
| Release Point (BRP) | ±25G typical - provides 15G hysteresis to prevent chatter near threshold |
| Output On-Voltage | 0.2V to 0.4V at 20mA - ensures low power dissipation and clean TTL/CMOS-compatible logic low |
| Internal Pullup Resistance | 10kΩ to 18kΩ - eliminates need for external resistor while maintaining fast rise time |
| Startup Time | 10µs typical - enables rapid system wake-up after power-on or brownout recovery |
| ESD Rating (HBM) | 8kV - withstands handling and board-level ESD events without protection circuitry |
Pinout & Package
Available in SOT23 (Type S), SIP-3 (Ammo Pack), and SIP-3 (Bulk Pack) packages. All variants use identical 3-pin configuration with exposed die pad for thermal conduction in SIP-3 versions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD | Positive supply input | Accepts 3.0–28V; includes reverse-blocking diode and 28V Zener clamp for transient protection |
| 2 - GND | Ground reference | Return path for internal regulator, sensor, and output stage; ties to substrate for EMI suppression |
| 3 - OUTPUT | Open-drain output with internal pullup | Switches low when B > BOP; rated for 60mA continuous, 55mA current-limited sink; includes Zener clamp |
Key Features
| Feature | Design Value |
|---|---|
| Omnipolar magnetic sensing | Detects either South or North pole - simplifies mechanical assembly and magnet orientation in end equipment |
| Chopper-stabilized architecture | Reduces offset drift to <0.5G/°C - maintains consistent BOP/BRP across full –40°C to +125°C range |
| Integrated output current limit | 30–55mA hard limit - protects against short-circuit faults without external current-sense resistors |
| Zener clamping on VDD and OUTPUT | 28V clamp on VDD, 32V absolute max on OUTPUT - enables operation in noisy 24V systems with inductive kickback |
| High RF noise immunity | Validated per IEC 61000-4-3 - resists radiated emissions up to 10V/m without external filtering |
Applications
| Appliance Door Detection | Industrial Flow Meter |
|---|---|
|
Use Scenario: Detecting open/closed state of washing machine or dishwasher doors using embedded magnets. IC Role / Device Role / Timing Role: Omnipolar switch providing clean, chatter-free logic-level signal to MCU GPIO upon door movement. Use Value: Eliminates mechanical microswitch wear; operates reliably across humidity, detergent exposure, and thermal cycling. |
Use Scenario: Sensing turbine rotation in water/gas flow meters via magnetic coupling to rotating impeller. IC Role / Device Role / Timing Role: High-speed magnetic threshold detector generating pulse train proportional to flow rate. Use Value: 4µs response time and 500kHz chopping frequency enable accurate counting up to 120Hz rotor speed. |
| Personal Care Device Positioning | Level Sensing in Tank Systems |
|
Use Scenario: Detecting lid closure or brush head attachment in electric toothbrushes and hair dryers. IC Role / Device Role / Timing Role: Low-power omnipolar switch triggering sleep/wake transitions or safety interlocks. Use Value: 3mA typical supply current at +25°C and 5mA max over full temperature range extends battery life. |
Use Scenario: Monitoring liquid level in HVAC condensate tanks or industrial chemical reservoirs using float-mounted magnets. IC Role / Device Role / Timing Role: Threshold-based level indicator interfacing directly to PLC digital inputs. Use Value: 28V VDD rating allows direct connection to 24V control bus; ±40G sensitivity works with low-cost ferrite magnets. |
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 | Wider BOP range (±25G to ±75G), no internal pullup, requires external resistor | Better for variable-strength magnet systems; lacks integrated protection clamps on VDD/OUTPUT | Select when adjustable sensitivity or higher ESD tolerance (16kV HBM) is required, and board space permits external components |
| Allegro A1120EUA-T | Narrower voltage range (3.5–24V), lower sensitivity (±50G BOP), no Zener clamp on OUTPUT | Suitable for cost-sensitive consumer designs but not 28V industrial rails or high-noise environments | Choose only for legacy 12V systems where 28V operation and output clamping are unnecessary |
Compared with US1881 and A1120EUA-T, the AH3524A uniquely combines 28V operation, internal pullup, dual Zener clamps, and 8kV ESD in a single SOT23/SIP-3 package - reducing BOM count and improving field reliability in demanding 24V industrial sensing.
Availability
AH3524A-P-A is available at Aetrix Electronics and suitable for industrial appliance door detection, flow metering, tank level monitoring, and personal care device positioning requiring stable component supply across extended temperature and voltage ranges.
Supply support for AH3524A-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 power management, signal integrity, and sensing solutions for industrial, automotive, and consumer markets.
The AH3524A belongs to Diodes' Hall-effect sensor product line, engineered specifically for robust, maintenance-free position and proximity sensing in high-voltage, high-noise, and thermally demanding environments.
FAQ
What is the maximum allowable supply voltage for continuous operation of the AH3524A-P-A?
The AH3524A-P-A is rated for continuous operation from 3.0V to 28V. While its absolute maximum VDD rating is 32V, this is a transient stress limit-not a functional operating condition-and prolonged use above 28V risks reliability degradation and is not recommended per datasheet Section 5.
Does the AH3524A-P-A require an external pullup resistor?
No. The AH3524A-P-A integrates a 10–18kΩ internal pullup resistor on the OUTPUT pin, eliminating the need for external components. This reduces PCB footprint, improves noise immunity, and ensures consistent rise time across temperature and voltage variations.
Can the AH3524A-P-A be used in automotive applications?
The AH3524A-P-A is not AEC-Q100 qualified and is not intended for automotive safety-critical systems. Diodes offers separate AEC-Q100–qualified Hall switches (e.g., AH357x series) for automotive use; this part targets industrial and consumer appliances per its datasheet scope and qualification statements.
How does the chopper stabilization in the AH3524A-P-A improve performance over conventional Hall switches?
Chopper stabilization actively cancels offset voltage drift caused by temperature gradients and mechanical stress, reducing BOP/BRP shift to <0.5G/°C. This enables stable switching thresholds across –40°C to +125°C without calibration, unlike non-chopped devices that exhibit >3G/°C drift and require complex compensation.
AH3524A-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
AH3524A-P-A FAQ
1.How can I place an order for AH3524A-P-A through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3524A-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 AH3524A-P-A reliable?
The price and inventory of AH3524A-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 AH3524A-P-A is usually 5 days.
3.What payment methods are accepted for AH3524A-P-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3524A-P-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3524A-P-A?
AH3524A-P-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3524A-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 AH3524A-P-A?
For technical support, including AH3524A-P-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3524A-P-A requirements.
6.How does Aetrix verify that AH3524A-P-A is sourced from the original manufacturer or authorized distributors?
All AH3524A-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 AH3524A-P-A meets industry standards.
7.What is the process for return or replacement of AH3524A-P-A?
All AH3524A-P-A units undergo pre-shipment inspection (PSI). If there is an issue with AH3524A-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 AH3524A-P-A part is unused and in its original packaging.
Return procedure for AH3524A-P-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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