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Diodes Incorporated AH3524Q-SA-7
- Part No.:
- AH3524Q-SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AH3524Q-SA-7.pdf
- Description:
- HALL OMNIPOLAR SWITCH SSOT23 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:2,616
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Product details
Overview
AH3524Q-SA-7 from Diodes Incorporated is an AEC-Q100 Grade 0 qualified automotive Hall-effect omnipolar switch IC in SOT23 (Type S) package, designed for contactless position and proximity sensing in harsh environments. It operates from 3.0V to 28V, features ±20G to ±60G magnetic operate points (BOP), 15G typical hysteresis, open-drain output with 30–55mA current limit, and supports seatbelt buckle, gear position, and door closure detection.
For engineers reviewing the AH3524Q-SA-7 datasheet, AH3524Q-SA-7 pinout, AH3524Q-SA-7 application, or AH3524Q-SA-7 equivalent, this device delivers robust magnetic switching performance across -40°C to +150°C ambient, with 40V load dump protection, chopper-stabilized architecture for minimal temperature drift, and integrated Zener clamps on VDD and OUTPUT pins.
Technical Context
The AH3524Q employs a chopper-stabilized Hall sensor with dynamic offset cancellation, enabling stable operation over wide voltage (3.0–28V) and temperature (-40°C to +150°C) ranges. Its internal bandgap regulator supplies temperature-compensated bias to analog circuitry, while the single open-drain output is protected by overcurrent limiting and bidirectional Zener clamping.
Magnetic response is omnidirectional: activation occurs with either south or north pole orientation relative to the package marking side. The device exhibits BOP of ±20G to ±60G and BRP of ±10G to ±45G, yielding 9–22G hysteresis-critical for noise immunity in automotive ECU environments where mechanical vibration and EMI are prevalent.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0V to 28V - Enables direct connection to automotive battery rail without external regulation. |
| Operating Temperature | -40°C to +150°C - Qualified for under-hood and cabin-mounted automotive modules. |
| Magnetic Operate Point (BOP) | ±20G to ±60G - High sensitivity enables detection with small or low-strength magnets. |
| Hysteresis (BHY) | 9G to 22G - Prevents chatter during slow or noisy magnetic transitions. |
| Output Current Limit | 30–55mA - Protects internal switch and external pull-up resistor from sustained overload. |
| Load Dump Protection | 40V transient rating - Withstands ISO 7637-2 Pulse 5a surges common in 12V/24V vehicle systems. |
| ESD Robustness | HBM: 8kV, CDM: 1kV - Meets stringent automotive board-level ESD requirements. |
Pinout & Package
SOT23 (Type S) surface-mount package with 3-pin configuration, JEDEC TO-236AB outline, matte tin-plated leads, moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD | Positive supply input | Accepts 3.0–28V DC; includes reverse-blocking diode and 28V Zener clamp for fault protection. |
| 2 - GND | Ground reference | Common return path for internal circuits and output load current; tied to substrate for EMI control. |
| 3 - OUTPUT | Open-drain output | Sinks up to 55mA when active; requires external pull-up; features Zener clamp to 32V and overcurrent shutdown. |
Key Features
| Feature | Design Value |
|---|---|
| Omnipolar magnetic sensing | Detects both north and south poles - eliminates magnet polarity orientation constraints in assembly. |
| Chopper-stabilized architecture | Reduces thermal drift of BOP/BRP to <±0.1G/°C - ensures consistent switching thresholds across full temperature range. |
| Integrated protection network | Reverse-blocking diode + dual Zener clamps (VDD and OUTPUT) - eliminates need for external TVS or diodes in most designs. |
| Fast response timing | 10µs power-on time, 4µs magnetic response delay - supports real-time feedback in safety-critical closures and actuators. |
| AEC-Q100 Grade 0 qualification | Validated for 150°C junction operation - certified for engine bay, transmission, and HVAC actuator applications. |
Applications
| Seatbelt Buckle Detection | Gear Position Sensing |
|---|---|
|
Use Scenario: Detect buckle engagement status in driver/passenger seats using a small magnet embedded in the tongue and Hall sensor mounted in the receptacle. IC Role / Device Role / Timing Role: Omnipolar switch provides latching ON/OFF state based on magnet proximity; open-drain output interfaces directly to microcontroller GPIO with pull-up. Use Value: Eliminates mechanical switches prone to wear and corrosion; operates reliably at 150°C ambient near seat heaters. |
Use Scenario: Monitor physical position of manual gear shift lever or automatic transmission selector gate via magnet array and fixed Hall sensors. IC Role / Device Role / Timing Role: Provides discrete position state (P/R/N/D/3/2/1) as digital logic levels; hysteresis prevents false shifts during vibration. Use Value: Enables fail-safe gear indicator and shift interlock logic without optical encoders or potentiometers. |
| Door/Trunk Closure Monitoring | HVAC Actuator Feedback |
|
Use Scenario: Confirm door or liftgate fully closed by detecting magnet alignment at latch point using surface-mount Hall sensor. IC Role / Device Role / Timing Role: Acts as proximity-triggered switch; output pulled low when magnet approaches within ±25G range. Use Value: Supports auto-lock/unlock, interior light control, and anti-pinch system validation with <10µs latency. |
Use Scenario: Provide end-of-travel feedback for blend door, mode door, or recirculation flap actuators in climate control systems. IC Role / Device Role / Timing Role: Signals actuator stall or target position via magnetic flag passing; immune to dust, oil, and condensation. Use Value: Replaces potentiometers subject to wiper wear and contamination; maintains accuracy after 100k+ cycles. |
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 |
|---|---|---|---|
| Allegro A1174LUA-T | BOP ±35G typ, 3.5–24V supply, SOIC-8 package, no load dump rating | Lacks 40V transient protection and AEC-Q100 Grade 0 qualification; suited for non-critical cabin modules only | Select when cost-sensitive non-engine-bay applications allow relaxed surge and temp specs. |
| Melexis US1881EUA-ABA-000-REEL | BOP ±25G typ, 3.5–24V, SOT23-3, 8kV HBM ESD, but only AEC-Q100 Grade 1 (125°C) | Not rated for 150°C ambient; insufficient for transmission or under-hood use cases | Choose only for dashboard, mirror, or center console sensing where peak ambient ≤125°C. |
Compared with A1174LUA-T and US1881EUA, the AH3524Q-SA-7 uniquely combines Grade 0 qualification, 40V load dump tolerance, and ±60G upper BOP limit-making it the sole option for high-reliability, high-temperature, high-voltage automotive proximity sensing where functional safety margins are critical.
Availability
AH3524Q-SA-7 is available at Aetrix Electronics and suitable for automotive seat occupancy systems, transmission position monitoring, and HVAC actuator feedback requiring stable component supply across extended temperature and voltage ranges.
Supply support for AH3524Q-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 ICs, specializing in high-reliability solutions for automotive, industrial, and computing markets with IATF 16949-certified facilities.
The AH352XQ series targets automotive position sensing with AEC-Q100 Grade 0 compliance, chopper stabilization, and integrated protection-designed specifically for safety-critical closures, actuators, and gear systems where long-term reliability under thermal and electrical stress is mandatory.
FAQ
What is the maximum continuous output current for AH3524Q-SA-7?
The AH3524Q-SA-7 provides a guaranteed output current limit of 30–55mA under all operating conditions. This internal current limiting protects both the IC's output transistor and the external pull-up resistor from damage during short-circuit or overload events, eliminating need for external current-limiting components.
Does AH3524Q-SA-7 require an external capacitor on VDD?
Yes, a 10nF–100nF ceramic decoupling capacitor is recommended between VDD and GND, placed as close as possible to the device pins. This stabilizes the internal bandgap regulator, suppresses supply noise, and enhances RF immunity-especially critical in electrically noisy automotive environments.
Can AH3524Q-SA-7 be used with 24V commercial vehicles?
Yes-the device is explicitly rated for 3.0V to 28V operation and includes 40V transient load dump protection. It has been validated for 24V truck and bus systems per ISO 7637-2 Pulse 5a, making it suitable for heavy-duty vehicle applications including cab controls and trailer coupling sensors.
How does the chopper-stabilized architecture improve performance?
The chopper-stabilized design dynamically cancels offset voltage in the Hall element and amplifier chain, reducing BOP/BRP drift to less than ±0.1G/°C. This ensures consistent magnetic switching thresholds across -40°C to +150°C-critical for reliable door latch or gear position detection where thermal gradients exceed 100°C.
AH3524Q-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:
- Active
- Function:
- Omnipolar Switch
- Technology:
- Hall Effect
- Polarization:
- North Pole, South Pole
- Sensing Range:
- ±6mT Trip, ±1mT Release
- Test Condition:
- -40°C ~ 150°C
- Voltage - Supply:
- 3V ~ 28V
- Current - Supply (Max):
- 3mA
- Current - Output (Max):
- 30mA
- Output Type:
- Open Drain
- Features:
- -
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
AH3524Q-SA-7 FAQ
1.How can I place an order for AH3524Q-SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3524Q-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 AH3524Q-SA-7 reliable?
The price and inventory of AH3524Q-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 AH3524Q-SA-7 is usually 5 days.
3.What payment methods are accepted for AH3524Q-SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3524Q-SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3524Q-SA-7?
AH3524Q-SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3524Q-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 AH3524Q-SA-7?
For technical support, including AH3524Q-SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3524Q-SA-7 requirements.
6.How does Aetrix verify that AH3524Q-SA-7 is sourced from the original manufacturer or authorized distributors?
All AH3524Q-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 AH3524Q-SA-7 meets industry standards.
7.What is the process for return or replacement of AH3524Q-SA-7?
All AH3524Q-SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH3524Q-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 AH3524Q-SA-7 part is unused and in its original packaging.
Return procedure for AH3524Q-SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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