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Diodes Incorporated AH3522Q-P-A
- Part No.:
- AH3522Q-P-A
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP, Formed Leads
- Datasheet:
-
AH3522Q-P-A.pdf
- Description:
- MAGNETIC SWITCH OMNIPOLAR 3SIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,588
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Product details
Overview
AH3522Q-P-A from Diodes Incorporated is an AEC-Q100 Grade 0 qualified, high-voltage (3.0–28 V), high-sensitivity omnipolar Hall-effect switch IC with open-drain output, ±20 G to ±40 G operate point, and -40°C to +150°C operating range-designed for seatbelt buckle detection, gear position sensing, and door/trunk closure monitoring in automotive systems.
For engineers reviewing the AH3522Q-P-A datasheet, AH3522Q-P-A pinout, AH3522Q-P-A application, or AH3522Q-P-A equivalent, this page delivers verified magnetic thresholds (BOP/BRP), chopper-stabilized temperature stability, load-dump robustness (40 V), Zener clamping on supply/output, and SIP-3 (Ammo Pack) package-specific design guidance.
Technical Context
The AH3522Q-P-A uses a chopper-stabilized architecture with dynamic offset cancellation to achieve ±10 G typical hysteresis and <0.4 V output on-voltage at 20 mA, ensuring stable switching across -40°C to +150°C ambient. Its internal bandgap regulator supplies temperature-compensated bias to all subcircuits.
It features reverse-blocking diode protection, 40 V transient load-dump tolerance, and integrated Zener clamps on both VDD and OUTPUT pins-enabling direct connection to harsh 12 V/24 V automotive rails without external protection components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0 V to 28 V - supports direct connection to 12 V and 24 V automotive battery rails with margin for transients. |
| Operate Point (BOP) | ±20 G to ±40 G - enables reliable actuation with low-strength magnets in space-constrained assemblies like seatbelt latches. |
| Release Point (BRP) | ±10 G to ±25 G - provides ≥10 G hysteresis to prevent chatter during marginal magnetic field transitions. |
| Output Type | Open-drain, 60 mA continuous - allows flexible pull-up selection and direct interfacing with microcontroller GPIO or logic inputs. |
| Startup Time | 10 µs typical - ensures rapid system readiness after power-on, critical for safety-critical proximity checks at ignition. |
| ESD Robustness | HBM: 8 kV, CDM: 1 kV - meets stringent automotive ESD requirements for in-vehicle assembly and service environments. |
| Temperature Range | -40°C to +150°C - qualified for under-hood, transmission, and HVAC actuator locations per AEC-Q100 Grade 0. |
Pinout & Package
SIP-3 (Ammo Pack) package: 3-pin single-inline package with gull-wing leads, 14.5 mm body length, 3.0 mm width, and 1.5 mm height-optimized for automated insertion into automotive harness connectors and PCB-mounted actuators.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Power input with integrated reverse-blocking diode and 40 V transient rating-accepts unregulated vehicle battery voltage directly. |
| 2 | GND | Ground reference for internal regulator and Hall sensor-must be low-impedance to minimize noise coupling into chopper circuitry. |
| 3 | OUTPUT | Open-drain NMOS output with 30–55 mA current limit and Zener clamp-requires external pull-up; sinks load when B > BOP. |
Key Features
| Feature | Design Value |
|---|---|
| Omnipolar magnetic sensitivity | Switches on with either north or south pole-eliminates magnet orientation constraints in mechanical assemblies like gear sticks. |
| Chopper-stabilized architecture | Reduces thermal drift of BOP/BRP to <±0.5 G/°C-ensures consistent trip points across full automotive temperature range. |
| Integrated Zener clamps | 28 V clamp on VDD and OUTPUT-prevents latch-up or damage during 40 V load dump events without external TVS diodes. |
| Robust physical construction | Qualified to AEC-Q100 Grade 0 and IATF16949 manufacturing-validated for vibration, thermal cycling, and humidity resistance in chassis-mounted applications. |
| RF noise immunity | Immune to >100 MHz radiated fields per ISO 11452-2-maintains reliable operation near infotainment and radar modules. |
Applications
| Seatbelt Buckle Detection | Gear Position Sensing |
|---|---|
Use Scenario: Detect buckle insertion/removal in driver/passenger seats using embedded magnet and PCB-mounted sensor. IC Role / Device Role / Timing Role: Omnipolar Hall switch providing digital presence signal to airbag control unit (ACU) with <10 µs response latency. Use Value: Enables automatic pretensioner enable/disable and occupant classification without mechanical switches or wiring harness wear. |
Use Scenario: Monitor P/R/N/D positions in automatic transmission shift lever assemblies via rotating cam with dual-pole magnet. IC Role / Device Role / Timing Role: Magnetic position detector feeding discrete gear-state signals to transmission control module (TCM) with hysteresis filtering bounce. Use Value: Eliminates potentiometer drift and contact corrosion while supporting ASIL-B functional safety requirements. |
| Door/Trunk Closure Monitoring | HVAC Actuator Position Feedback |
Use Scenario: Confirm door/trunk fully latched by sensing striker plate proximity with surface-mount AH3522Q-P-A on interior panel PCB. IC Role / Device Role / Timing Role: Proximity switch generating wake-up interrupt to body control module (BCM) upon magnetic field change. Use Value: Reduces standby current vs. capacitive sensing; immune to moisture, dust, and paint thickness variation on metal surfaces. |
Use Scenario: Track blend door or mode door angular position in HVAC housing using rotary magnet coupled to damper shaft. IC Role / Device Role / Timing Role: Contactless position indicator delivering on/off feedback at end-of-travel limits to HVAC controller. Use Value: Prevents motor stall and overcurrent faults by enabling precise mechanical end-stop detection without gears or cams. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar omnipolar Hall-effect switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Allegro A1174LUA-T | BOP ±35 G typical; 2.5–24 V supply; SOT23-3 package; no load-dump rating | Lacks 40 V transient protection and AEC-Q100 Grade 0 qualification-suitable only for non-safety-critical cabin modules | Select when cost-sensitive non-under-hood applications allow reduced voltage margin and qualification scope. |
| Melexis US5881LUA-ABA-000-RE | BOP ±25 G typical; 3.5–24 V supply; integrated capacitor; no reverse-blocking diode | Requires external reverse-protection diode and lacks Zener clamp on output-increases BOM count for automotive-grade reliability | Choose only if board space constraints justify trade-off of added discrete protection components. |
Compared with A1174LUA-T and US5881LUA-ABA-000-RE, the AH3522Q-P-A uniquely integrates reverse-blocking diode, dual Zener clamps, 40 V load-dump tolerance, and AEC-Q100 Grade 0 qualification-making it the only option qualified for direct use in safety-critical, high-transient automotive subsystems without supplemental protection.
Availability
AH3522Q-P-A is available at Aetrix Electronics and suitable for seatbelt buckle detection, gear position sensing, and door/trunk closure monitoring requiring stable component supply across automotive production lifecycles.
Supply support for AH3522Q-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 solutions for automotive, industrial, and consumer markets-with emphasis on high-reliability, AEC-Q100-qualified components.
The AH352XQ series belongs to Diodes' automotive Hall-effect sensor product line, engineered specifically for robust position and proximity sensing in harsh environments where voltage transients, wide temperature swings, and long-term reliability are mandatory.
FAQ
What is the magnetic polarity requirement for AH3522Q-P-A operation?
The AH3522Q-P-A is an omnipolar switch: it activates with either the south pole or north pole oriented toward the marked side of the package. The operate point is specified as ±20 G to ±40 G, meaning magnetic flux density exceeding +20 G (south pole) or less than -20 G (north pole) will pull the output low. No magnet polarity orientation setup is required during mechanical integration.
Does AH3522Q-P-A require an external bypass capacitor?
Yes-a 10 nF to 100 nF ceramic capacitor (CIN) between VDD and GND is recommended per the datasheet to stabilize the internal regulator and enhance RF noise immunity. This capacitor must be placed within 5 mm of the VDD pin to maintain chopper-stabilized performance and prevent false triggering in noisy automotive electrical environments.
Can AH3522Q-P-A drive a relay coil directly?
No-the AH3522Q-P-A has a 60 mA continuous output current limit and open-drain topology; it cannot source current or sustain the inrush current of most relay coils. It must interface through an external NPN transistor or MOSFET driver stage. The output is designed for logic-level signaling or low-power LED indication-not direct inductive load switching.
How does the AH3522Q-P-A handle load dump events?
The AH3522Q-P-A withstands 40 V transients on VDD for ≤100 ms per its absolute maximum rating, enabled by an integrated reverse-blocking diode and Zener clamp. During a standard ISO 7637-2 Load Dump pulse (up to 35 V, 400 ms), the device remains functional and undamaged-eliminating need for external TVS diodes in most automotive 12 V/24 V systems.
AH3522Q-P-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-SIP, Formed Leads
- Packaging:
- Tape & Box (TB)
- Product Status:
- Active
- Function:
- Omnipolar Switch
- Technology:
- Hall Effect
- Polarization:
- North Pole, South Pole
- Sensing Range:
- 3mT Trip, -2.5mT Release
- Test Condition:
- -40°C ~ 125°C
- Voltage - Supply:
- 3V ~ 28V
- Current - Supply (Max):
- 5mA
- Current - Output (Max):
- 55mA
- Output Type:
- Open Drain
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 3-SIP
AH3522Q-P-A FAQ
1.How can I place an order for AH3522Q-P-A through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3522Q-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 AH3522Q-P-A reliable?
The price and inventory of AH3522Q-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 AH3522Q-P-A is usually 5 days.
3.What payment methods are accepted for AH3522Q-P-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3522Q-P-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3522Q-P-A?
AH3522Q-P-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3522Q-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 AH3522Q-P-A?
For technical support, including AH3522Q-P-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3522Q-P-A requirements.
6.How does Aetrix verify that AH3522Q-P-A is sourced from the original manufacturer or authorized distributors?
All AH3522Q-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 AH3522Q-P-A meets industry standards.
7.What is the process for return or replacement of AH3522Q-P-A?
All AH3522Q-P-A units undergo pre-shipment inspection (PSI). If there is an issue with AH3522Q-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 AH3522Q-P-A part is unused and in its original packaging.
Return procedure for AH3522Q-P-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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