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Diodes Incorporated AH3322Q-P-A
- Part No.:
- AH3322Q-P-A
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP, Formed Leads
- Datasheet:
-
AH3322Q-P-A.pdf
- Description:
- HALL UNIPOLAR SWITCH SIP-3 AMMO
- Quantity:
- Payment:
- Shipping:
Inventory:4,516
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Product details
Overview
AH3322Q-P-A from Diodes Incorporated is an AEC-Q100 Grade 0 qualified automotive Hall-effect unipolar switch IC designed for contactless position and proximity sensing in harsh environments. It operates from 3.0V to 28V, features open-drain output with 60mA current limit, 30G–45G operate point (BOP), and -40°C to +150°C operation-used in seatbelt buckle detection and gear position sensing.
For engineers reviewing the AH3322Q-P-A datasheet, AH3322Q-P-A pinout, AH3322Q-P-A application, or AH3322Q-P-A equivalent, key selection criteria include magnetic sensitivity tolerance, load-dump immunity (40V), chopper-stabilized temperature stability, and SIP-3 (Ammo Pack) package compatibility with automotive PCB assembly processes.
Technical Context
The AH3322Q-P-A uses a chopper-stabilized architecture with dynamic offset cancellation to suppress thermal drift and mechanical stress effects on switching thresholds. Its internal bandgap regulator supplies temperature-compensated bias to analog blocks, ensuring stable BOP/BRP hysteresis across -40°C to +150°C.
It implements unipolar switching logic: South-pole activation only, with output pulled low when perpendicular magnetic flux exceeds BOP (30G typ), and released only below BRP (20G typ). Polarity orientation depends on package type-SIP-3 requires South pole toward part marking side.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0V to 28V - supports direct connection to automotive battery rails including cold-crank (≥3V) and load-dump transients (with 40V absolute max rating) |
| Operate Point (BOP) | 15G to 45G (typ 30G) - enables reliable actuation with small, low-cost magnets at air gaps up to 3.5mm in seatbelt buckle mechanisms |
| Release Point (BRP) | 5G to 35G (typ 20G) - provides 10G minimum hysteresis to prevent chatter during slow magnetic field transitions in door closure sensing |
| Output Type | Open-drain, 60mA continuous - interfaces directly with 3.3V/5V/12V microcontroller GPIOs via external pull-up; supports RL = 1kΩ typical |
| Startup Time | 10µs typical - ensures immediate functional readiness after power-on in safety-critical systems like steering lock enablement |
| ESD Robustness | HBM 8kV, CDM 1kV - meets automotive ESD immunity requirements for in-vehicle assembly and service handling |
| Operating Temperature | -40°C to +150°C - validated for under-hood and cabin-mounted applications including HVAC actuators and transmission sensors |
Pinout & Package
Package: SIP-3 (Ammo Pack), 3-pin surface-mount package with spread leads, RoHS-compliant, halogen-free, and lead-free construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Power supply input - accepts 3.0V–28V DC; includes reverse-blocking diode and zener clamp for ±18V reverse and 40V transient protection |
| 2 | GND | Ground reference - low-impedance return path for internal regulator and output stage; must be connected before VDD per startup sequencing |
| 3 | OUTPUT | Open-drain output - sinks up to 60mA; requires external pull-up resistor (RL); clamped to 32V max off-state voltage |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized architecture | Reduces thermal drift of BOP/BRP to <±0.5G/°C, enabling stable switching over full automotive temperature range without calibration |
| 40V load dump protection | Withstands ISO 7637-2 Pulse 5a transients without external TVS, reducing BOM count in 12V/24V vehicle networks |
| South-pole-only activation (SIP-3) | Eliminates false triggers from stray North-pole fields in multi-sensor clusters such as gear stick assemblies |
| Zener clamps on VDD and OUTPUT | Prevents latch-up during ESD events and inductive kickback from relay coils or motor loads sharing same PCB ground |
| AEC-Q100 Grade 0 qualification | Validated for 150°C junction operation and PPAP-ready for Tier-1 automotive production with IATF 16949 traceability |
Applications
| Seatbelt Buckle Detection | Steering Column Lock Sensing |
|---|---|
|
Use Scenario: Detect buckle insertion/removal in driver/passenger seats using embedded magnet and PCB-mounted sensor. IC Role / Device Role / Timing Role: Unipolar Hall switch providing fail-safe occupancy status to airbag control unit (ACU) within 10µs of valid magnetic field change. Use Value: 30G BOP enables use of compact NdFeB magnets; SIP-3 package allows high-density placement near buckle mechanism with minimal board area. |
Use Scenario: Confirm mechanical engagement of steering lock solenoid during vehicle start-up and immobilization sequences. IC Role / Device Role / Timing Role: Position feedback element verifying physical lock state before enabling ignition and CAN bus communication. Use Value: 150°C rating supports under-dash mounting near column heater; 40V transient tolerance avoids need for external protection in 24V commercial vehicle systems. |
| Transmission Gear Position | Door/Trunk Closure Monitoring |
|
Use Scenario: Sense P/R/N/D gear selector lever position in automatic transmissions using rotary cam and magnet array. IC Role / Device Role / Timing Role: Magnetic threshold detector feeding discrete gear state signals to transmission control module (TCM) via dedicated GPIO lines. Use Value: 10G hysteresis prevents oscillation during gear shift transitions; chopper stabilization maintains accuracy across oil-temperature-induced mechanical expansion. |
Use Scenario: Monitor latched/unlatched state of doors, liftgates, and trunk lids in body control modules (BCM). IC Role / Device Role / Timing Role: Proximity sensor reporting closure status to BCM for interior lighting, alarm arming, and power window auto-reverse logic. Use Value: SIP-3's spread-lead design resists vibration-induced solder fatigue; 8kV HBM ESD withstand protects against static discharge during service access. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unipolar Hall switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Allegro A3212LLHLT-T | BOP/BRP tighter tolerance (±2G vs ±15G), but only rated to +125°C and lacks 40V load-dump rating | Suitable for cabin-only applications (e.g., sunroof switches) but not under-hood or 24V commercial vehicles | Select when higher magnetic precision is required and ambient temperature remains ≤125°C |
| Melexis US1881EUA-ABA-000-SP | Higher BOP (60G min), no AEC-Q100 Grade 0 certification, and 30V absolute max supply rating | Used in cost-sensitive industrial controls; lacks PPAP documentation and IATF 16949 manufacturing traceability | Select for non-automotive industrial proximity sensing where AEC-Q100 and load-dump immunity are not mandated |
Compared with A3212LLHLT-T and US1881EUA-ABA-000-SP, the AH3322Q-P-A uniquely combines AEC-Q100 Grade 0, 40V transient tolerance, and SIP-3 packaging optimized for automotive volume production-making it the only choice for safety-critical, high-temperature, and electrically noisy environments.
Availability
AH3322Q-P-A is available at Aetrix Electronics and suitable for seatbelt buckle detection, steering lock verification, and transmission gear position sensing requiring stable component supply across automotive production lifecycles.
Supply support for AH3322Q-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 IATF 16949-certified facilities.
The AH332XQ series belongs to Diodes' automotive Hall-effect sensor product line, engineered specifically for robust, high-temperature position sensing in safety-critical vehicle subsystems.
FAQ
What is the magnetic polarity requirement for AH3322Q-P-A activation?
The AH3322Q-P-A in SIP-3 (Ammo Pack) package requires a South pole applied to the part marking side for activation. This is confirmed in the datasheet's magnetic characteristics table and pin diagram. Applying North pole or misorienting the magnet results in no output switching. The device does not respond to alternating or bipolar fields.
Does AH3322Q-P-A require an external capacitor on VDD?
Yes, a 10nF–100nF ceramic decoupling capacitor (CIN) is required between VDD and GND per the Typical Applications Circuit. This stabilizes the internal bandgap regulator and improves RF noise immunity. Omitting CIN risks erratic switching behavior under EMI or fast supply transients, especially in wiper or HVAC motor environments.
Can AH3322Q-P-A drive a relay coil directly?
No. The AH3322Q-P-A has a 60mA continuous output current limit and is designed for signal-level switching only. Driving a relay coil (typically >100mA) would exceed its safe operating area and trigger output current limiting or thermal shutdown. Use it to control a MOSFET or transistor driver stage instead.
Is AH3322Q-P-A pin-compatible with other AH332XQ variants?
Yes-all AH332XQ variants (e.g., AH3323Q, AH3324Q) share identical SIP-3 (Ammo Pack) pinout, footprint, and electrical interface. Only magnetic sensitivity (BOP/BRP) differs between part numbers. System-level replacement is possible if the new BOP/BRP values meet the mechanical air gap and magnet strength requirements of the target application.
AH3322Q-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:
- Unipolar Switch
- Technology:
- Hall Effect
- Polarization:
- South Pole
- Sensing Range:
- 4.5mT Trip, 0.5mT Release
- Test Condition:
- 25°C
- Voltage - Supply:
- 3V ~ 28V
- Current - Supply (Max):
- 4mA
- Current - Output (Max):
- 60mA
- Output Type:
- Open Drain
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 150°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 3-SIP
AH3322Q-P-A FAQ
1.How can I place an order for AH3322Q-P-A through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3322Q-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 AH3322Q-P-A reliable?
The price and inventory of AH3322Q-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 AH3322Q-P-A is usually 5 days.
3.What payment methods are accepted for AH3322Q-P-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3322Q-P-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3322Q-P-A?
AH3322Q-P-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3322Q-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 AH3322Q-P-A?
For technical support, including AH3322Q-P-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3322Q-P-A requirements.
6.How does Aetrix verify that AH3322Q-P-A is sourced from the original manufacturer or authorized distributors?
All AH3322Q-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 AH3322Q-P-A meets industry standards.
7.What is the process for return or replacement of AH3322Q-P-A?
All AH3322Q-P-A units undergo pre-shipment inspection (PSI). If there is an issue with AH3322Q-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 AH3322Q-P-A part is unused and in its original packaging.
Return procedure for AH3322Q-P-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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