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Diodes Incorporated AH3523Q-P-B
- Part No.:
- AH3523Q-P-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP
- Datasheet:
-
AH3523Q-P-B.pdf
- Description:
- HALL OMNIPOLAR SWITCH SIP-3 BULK
- Quantity:
- Payment:
- Shipping:
Inventory:4,694
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Product details
Overview
AH3523Q-P-B from Diodes Incorporated is an AEC-Q100 Grade 0 qualified automotive Hall-effect omnipolar switch IC in SIP-3 (Bulk Pack) package, designed for position and proximity sensing in harsh environments. It operates from 3.0V to 28V, delivers ±30G typical operate point (BOP), ±20G typical release point (BRP), 10µs startup time, and features open-drain output with 30–55mA current limiting - deployed in seatbelt buckle detection, gear position sensing, and door/trunk closure systems.
For engineers reviewing the AH3523Q-P-B datasheet, AH3523Q-P-B pinout, AH3523Q-P-B application, or AH3523Q-P-B equivalent, this page provides verified magnetic thresholds, thermal stability data across −40°C to +150°C, load dump protection rating, chopper-stabilized offset cancellation architecture, and SIP-3 terminal mapping for PCB layout and functional validation.
Technical Context
The AH3523Q-P-B implements a chopper-stabilized Hall sensor with dynamic offset cancellation, enabling stable switching over −40°C to +150°C without external compensation. Its internal bandgap regulator supplies temperature-compensated bias to analog blocks, while the Zener clamp on VDD (28V) and OUTPUT pins ensures robustness against transients.
It supports omnipolar operation: output turns ON (low) when |B| exceeds BOP (±15–45G) and remains ON until |B| falls below BRP (±5–35G), delivering 10G minimum hysteresis. The single open-drain output includes overcurrent limiting (30–55mA) and reverse polarity protection via integrated blocking diode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0V to 28V - enables direct connection to automotive battery rails without external regulation |
| Operate Point (BOP) | ±15G to ±45G typ. - detects weak magnetic fields from small magnets at extended air gaps |
| Release Point (BRP) | ±5G to ±35G typ. - ensures clean hysteresis-driven noise immunity in vibrating environments |
| Output Type | Open-drain with 30–55mA current limit - drives standard pull-up resistors and interfaces directly with MCU GPIOs |
| Startup Time | 10µs typical - guarantees fast system response after power-on reset in safety-critical modules |
| Operating Temperature | −40°C to +150°C - validated for under-hood and cabin-mounted automotive subsystems |
| ESD Rating | HBM: 8kV, CDM: 1kV - meets stringent automotive ESD immunity requirements |
| Load Dump Protection | 40V transient rating - withstands ISO 7637-2 Pulse 5a without external TVS |
Pinout & Package
SIP-3 (Bulk Pack) package with 3-pin straight-lead configuration, optimized for automated insertion and high-reliability automotive assembly. Pin 1 = VDD, Pin 2 = GND, Pin 3 = OUTPUT - compatible with standard SIP-3 footprints and wave-soldering processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VDD) | Power supply input | Accepts 3.0–28V DC; integrates reverse-blocking diode and 28V Zener clamp for fault tolerance |
| 2 (GND) | Ground reference | Common return path for internal circuitry and output stage; low-impedance thermal pad connection |
| 3 (OUTPUT) | Open-drain output | Sinks up to 55mA; includes Zener clamp and overcurrent foldback to prevent latch-up during short circuits |
Key Features
| Feature | Design Value |
|---|---|
| Omnipolar magnetic sensitivity | Detects both north and south poles with identical BOP/BRP thresholds - eliminates magnet orientation dependency in mechanical assemblies |
| Chopper-stabilized architecture | Reduces thermal drift of BOP/BRP to <±0.1G/°C - maintains consistent switching points across full automotive temperature range |
| Integrated protection network | VDD reverse-blocking diode + Zener clamp + OUTPUT Zener clamp - removes need for 3 external protection components |
| High ESD robustness | 8kV HBM rating - survives handling and assembly without additional ESD safeguards |
| AEC-Q100 Grade 0 qualification | Validated for 150°C ambient operation - certified for engine bay, transmission, and HVAC actuator use cases |
Applications
| Seatbelt Buckle Detection | Gear Position Sensing |
|---|---|
|
Use Scenario: Detect buckle engagement status in driver/passenger seats using embedded magnet and fixed Hall sensor. IC Role / Device Role / Timing Role: Omnipolar switch providing latched ON/OFF signal indicating mechanical closure state. Use Value: Eliminates mechanical switches prone to wear; operates reliably through 100,000+ cycles with no contact degradation. |
Use Scenario: Monitor physical gear lever position in automatic transmission control units. IC Role / Device Role / Timing Role: Magnetic proximity detector feeding discrete position states to transmission ECU. Use Value: Enables fail-safe neutral/safe-start logic with <10µs response - critical for ASIL-B compliant shift interlock systems. |
| Door/Trunk Closure Monitoring | HVAC Actuator Feedback |
|
Use Scenario: Confirm door or trunk lid fully closed in body control modules using magnet-on-latch and PCB-mounted sensor. IC Role / Device Role / Timing Role: Proximity switch generating wake-up interrupt to microcontroller upon closure event. Use Value: Supports ultra-low quiescent current (<5mA max) and operates down to 3.0V - extends battery life in always-on monitoring mode. |
Use Scenario: Provide end-of-travel feedback for HVAC blend door actuators driven by stepper motors. IC Role / Device Role / Timing Role: Position limiter switch preventing motor stall and mechanical overtravel. Use Value: Withstands 150°C ambient and 40V load dump - eliminates field failures caused by thermal stress or alternator transients. |
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 US5881LUA-ABA-000-RE | Higher BOP (±50G), SOT23-3 package, no load dump rating | Limited to cabin applications only; lacks 40V transient immunity required for under-hood use | Select when higher magnetic immunity is needed and environment is non-transient-prone |
| Allegro A1174LUA-T | BOP ±25G, -40°C to +150°C, but only AEC-Q100 Grade 1 (125°C max ambient) | Not rated for sustained 150°C operation - unsuitable for transmission or engine compartment mounting | Choose only for interior modules where ambient stays ≤125°C |
Compared with AH3523Q-P-B, US5881LUA offers tighter magnetic tolerance but no automotive-grade transient protection, while A1174LUA sacrifices Grade 0 qualification for lower cost - AH3523Q-P-B uniquely balances wide voltage range, full Grade 0 compliance, and integrated protection in SIP-3 packaging.
Availability
AH3523Q-P-B is available at Aetrix Electronics and suitable for automotive seat occupancy systems, transmission position feedback, and HVAC actuator monitoring requiring stable component supply across long production lifecycles.
Supply support for AH3523Q-P-B 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 belongs to Diodes' automotive Hall-effect sensor product line, engineered specifically for robust position and proximity sensing in AEC-Q100-compliant systems exposed to extreme temperature, voltage transients, and mechanical stress.
FAQ
What is the magnetic sensitivity range of AH3523Q-P-B?
The AH3523Q-P-B has a typical operate point (BOP) of ±30G and release point (BRP) of ±20G, with guaranteed ranges of ±15G to ±45G and ±5G to ±35G respectively. These values are specified across −40°C to +150°C and enable reliable detection with small neodymium magnets at air gaps up to 3.5mm in automotive mechanical assemblies.
Does AH3523Q-P-B require an external pull-up resistor?
Yes - the AH3523Q-P-B features an open-drain output that requires an external pull-up resistor (typically 1kΩ to 10kΩ) between VDD and the OUTPUT pin. This resistor sets logic-high voltage level and rise time; RL = 1kΩ yields ~0.2µs rise time with 20pF load capacitance per datasheet characterization.
Can AH3523Q-P-B be used in 48V mild-hybrid vehicle systems?
No - AH3523Q-P-B is rated for 3.0V to 28V operation with 40V absolute maximum transient rating. It is not designed for continuous 48V rail operation or 60V+ load dump events common in 48V architectures. Use only in conventional 12V/24V automotive systems meeting ISO 16750-2 requirements.
What is the difference between AH3523Q-P-B and AH3523Q-SA-7?
AH3523Q-P-B uses SIP-3 (Bulk Pack) packaging with straight leads for through-hole insertion, while AH3523Q-SA-7 uses SOT23-3 (Type S) surface-mount packaging on 7-inch tape-and-reel. Both share identical electrical specs and AEC-Q100 qualification, but differ in mechanical form factor, thermal dissipation (SIP-3: 550mW, SOT23: 230mW), and assembly process compatibility.
AH3523Q-P-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-SIP
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Omnipolar Switch
- Technology:
- Hall Effect
- Polarization:
- North Pole, South Pole
- Sensing Range:
- ±4.5mT Trip, ±0.5mT 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:
- Through Hole
- Supplier Device Package:
- 3-SIP
AH3523Q-P-B FAQ
1.How can I place an order for AH3523Q-P-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3523Q-P-B 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 AH3523Q-P-B reliable?
The price and inventory of AH3523Q-P-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH3523Q-P-B is usually 5 days.
3.What payment methods are accepted for AH3523Q-P-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3523Q-P-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3523Q-P-B?
AH3523Q-P-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3523Q-P-B 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 AH3523Q-P-B?
For technical support, including AH3523Q-P-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3523Q-P-B requirements.
6.How does Aetrix verify that AH3523Q-P-B is sourced from the original manufacturer or authorized distributors?
All AH3523Q-P-B 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 AH3523Q-P-B meets industry standards.
7.What is the process for return or replacement of AH3523Q-P-B?
All AH3523Q-P-B units undergo pre-shipment inspection (PSI). If there is an issue with AH3523Q-P-B, 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 AH3523Q-P-B part is unused and in its original packaging.
Return procedure for AH3523Q-P-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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