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Diodes Incorporated AH3322Q-P-B
- Part No.:
- AH3322Q-P-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP
- Datasheet:
-
AH3322Q-P-B.pdf
- Description:
- HALL UNIPOLAR SWITCH SIP-3 BULK
- Quantity:
- Payment:
- Shipping:
Inventory:2,206
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Product details
Overview
AH3322Q-P-B from Diodes Incorporated is an AEC-Q100 Grade 0 qualified high-voltage Hall-effect unipolar switch IC for automotive position and proximity sensing, featuring 3.0V–28V supply range, 30G typical operate point (BOP), 20G typical release point (BRP), open-drain output with 60mA continuous current rating, and operation from −40°C to +150°C - deployed in seatbelt buckles, gear position detection, and door/trunk closure systems.
For engineers reviewing the AH3322Q-P-B datasheet, AH3322Q-P-B pinout, AH3322Q-P-B application, or AH3322Q-P-B equivalent, this device delivers verified magnetic switching behavior, load-dump robustness, chopper-stabilized temperature stability, and SIP-3 (Bulk Pack) compatibility for high-reliability automotive PCB integration.
Technical Context
The AH3322Q-P-B implements a chopper-stabilized Hall sensor with dynamic offset cancellation and internal bandgap-regulated biasing, enabling minimal BOP/BRP drift across −40°C to +150°C ambient. Its architecture includes sample-and-hold amplification, low-pass filtering, and a power switch driving a single open-drain output.
Magnetic actuation is polarity-specific: for SIP-3 packages (including AH3322Q-P-B), a South pole applied to the part-marking side triggers turn-on when B ≥ 30G (typ), and release occurs at B ≤ 20G (typ), with 10G (typ) hysteresis ensuring noise-immune state retention.
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 (up to 40V non-operational stress) |
| Operate Point (BOP) | 15G to 45G (min–max), 30G typical - enables reliable activation with small, low-cost magnets in tight mechanical gaps |
| Release Point (BRP) | 5G to 35G (min–max), 20G typical - ensures stable off-state under vibration or weak stray fields |
| Output Type | Open-drain N-channel MOSFET - allows flexible pull-up to any voltage ≤32V and supports wired-OR configurations |
| Output Current Limit | 30mA to 55mA - protects against short-circuit faults while sustaining >20mA drive into standard 1kΩ pull-ups |
| Startup Time | 10µs typical - guarantees valid output within microseconds after VDD reaches 3V, critical for fast-response safety subsystems |
| ESD Robustness | HBM: 8kV, CDM: 1kV - exceeds AEC-Q100 Grade 0 requirements for assembly and field handling in automotive production |
Pinout & Package
AH3322Q-P-B is supplied in SIP-3 (Bulk Pack) package - a 3-pin, straight-lead, surface-mount package with 2.54mm pitch, optimized for automated insertion and high-temperature reflow compatibility up to 260°C peak.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Positive supply input - accepts 3.0V–28V with integrated reverse-blocking diode and zener clamp (28V) for transient protection |
| 2 | GND | Ground reference - common return path for internal regulator, Hall element, and output stage; requires low-impedance PCB connection |
| 3 | OUTPUT | Open-drain output - sinks current when active (B ≥ BOP); clamped to 32V max off-state; requires external pull-up resistor (1kΩ–10kΩ typical) |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized Hall sensing | Reduces thermal drift of BOP/BRP to ±0.1G/°C typical, enabling stable switching across full −40°C to +150°C automotive range |
| Integrated supply protection | Reverse-blocking diode + 28V zener clamp on VDD eliminates need for external TVS in most 12V/24V vehicle architectures |
| Output fault protection | Internal 60mA continuous / 55mA current limit + 32V output zener clamp prevent latch-up during wiring faults or ESD events |
| AEC-Q100 Grade 0 qualification | Validated for operation up to +150°C ambient and qualified per stress tests including HTOL, TC, UHAST, and ESD - required for engine bay and transmission applications |
| RF noise immunity | Chopping frequency at 500kHz and internal filtering suppress common-mode RF interference from ignition systems and DC motors without external shielding |
Applications
| Seatbelt Buckle Detection | Gear Position Sensing |
|---|---|
|
Use Scenario: Detect buckle engagement status in driver/passenger seats using a magnet embedded in the tongue and AH3322Q-P-B mounted on the receptacle housing. IC Role / Device Role / Timing Role: Unipolar Hall switch providing digital ON/OFF signal indicating mechanical latching; operates continuously during vehicle runtime. Use Value: Eliminates mechanical microswitch wear, withstands 150°C under-seat temperatures, and resists vibration-induced chatter due to 10G hysteresis. |
Use Scenario: Monitor P/R/N/D gear selector position in automatic transmissions via cam-actuated magnet alignment near gearbox housing. IC Role / Device Role / Timing Role: Proximity sensor converting gear lever angle into discrete logic-level output for TCU input; immune to oil contamination and thermal cycling. Use Value: Enables fail-safe gear indication without contact wear; 40V load-dump tolerance prevents upset during alternator regulation transients. |
| Door/Trunk Closure Monitoring | Steering Column Lock Activation |
|
Use Scenario: Confirm door or trunk lid fully closed by detecting magnet position on striker plate with AH3322Q-P-B mounted on the frame. IC Role / Device Role / Timing Role: Position-sensing switch feeding body control module (BCM); must remain functional during repeated slamming and thermal soak. Use Value: SIP-3 package withstands mechanical stress; −40°C to +150°C rating covers exterior mounting; open-drain output interfaces directly with 5V or 12V BCM inputs. |
Use Scenario: Verify immobilizer lock/unlock state in steering column by sensing rotation of a ferrous vane or magnet attached to lock mechanism. IC Role / Device Role / Timing Role: Safety-critical proximity detector enabling/disabling starter circuit; requires AEC-Q100 Grade 0 reliability and <10µs response. Use Value: 10µs startup time ensures immediate readiness after ignition-on; 8kV HBM ESD rating prevents field failures during service access. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect unipolar switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL3322Q-P-B | Same pinout and SIP-3 package; BOP/BRP shifted to 25G/15G typical - lower sensitivity, reduced false-trigger risk in high-stray-field environments | Better suited for high-noise locations (e.g., near alternators), but requires stronger magnets or closer air gaps than AH3322Q-P-B | Select AL3322Q-P-B only if system-level testing confirms insufficient margin with AH3322Q-P-B's 30G/20G thresholds |
| TLE4913-2SA | Infineon bipolar Hall switch; requires alternating N/S poles; 5V-only supply; no 28V operation or load-dump protection | Designed for low-voltage, low-power modules (e.g., mirror controls); incompatible with 12V/24V direct-battery interfacing | Not a drop-in replacement - requires redesign of supply rail, magnet orientation, and ESD protection network |
Compared with AL3322Q-P-B and TLE4913-2SA, AH3322Q-P-B uniquely combines wide 3.0V–28V operation, SIP-3 mechanical robustness, and AEC-Q100 Grade 0 qualification for under-hood and chassis-mounted sensing where supply instability and thermal extremes dominate design constraints.
Availability
AH3322Q-P-B is available at Aetrix Electronics and suitable for automotive seat occupancy systems, transmission gear position monitoring, and door/trunk closure detection requiring stable component supply across extended temperature and voltage ranges.
Supply support for AH3322Q-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 analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets with IATF 16949-certified manufacturing.
AH3322Q-P-B belongs to the AH332XQ family of AEC-Q100 qualified Hall-effect switches engineered specifically for contactless position sensing in harsh automotive environments - emphasizing supply resilience, thermal stability, and ESD survivability.
FAQ
What is the magnetic polarity requirement for AH3322Q-P-B activation?
AH3322Q-P-B uses SIP-3 (Bulk Pack) packaging, which requires a South pole applied to the part-marking side to activate. When magnetic flux density perpendicular to the package exceeds 30G (typical operate point), the open-drain output pulls low. Release occurs below 20G (typical release point). Polarity orientation is confirmed in the device marking diagram on page 6 of DS46150 Rev. 2–2.
Does AH3322Q-P-B require an external capacitor on VDD?
Yes - a 10nF to 100nF ceramic decoupling capacitor (CIN) is required between VDD and GND, placed as close as possible to the SIP-3 pins. This stabilizes the internal bandgap regulator, improves noise immunity against RF interference, and prevents false triggering during supply transients, as specified in the Typical Applications Circuit on page 2 of DS46150 Rev. 2–2.
Can AH3322Q-P-B be used in 24V commercial vehicle systems?
Yes - AH3322Q-P-B is rated for continuous operation from 3.0V to 28V and withstands 40V load-dump transients per ISO 7637-2 Pulse 5a. Its 28V zener clamp on VDD and 32V output clamp ensure functional integrity during alternator regulation surges common in heavy-duty truck and bus electrical systems.
Is AH3322Q-P-B compatible with lead-free reflow profiles?
Yes - AH3322Q-P-B is fully RoHS 3 compliant, halogen- and antimony-free ("Green"), and qualified for standard lead-free reflow with peak temperature up to 260°C. The SIP-3 package meets JEDEC J-STD-020 moisture sensitivity level (MSL) 1, eliminating bake requirements prior to assembly.
AH3322Q-P-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-SIP
- Packaging:
- Bulk
- 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-B FAQ
1.How can I place an order for AH3322Q-P-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3322Q-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 AH3322Q-P-B reliable?
The price and inventory of AH3322Q-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 AH3322Q-P-B is usually 5 days.
3.What payment methods are accepted for AH3322Q-P-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3322Q-P-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3322Q-P-B?
AH3322Q-P-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3322Q-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 AH3322Q-P-B?
For technical support, including AH3322Q-P-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3322Q-P-B requirements.
6.How does Aetrix verify that AH3322Q-P-B is sourced from the original manufacturer or authorized distributors?
All AH3322Q-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 AH3322Q-P-B meets industry standards.
7.What is the process for return or replacement of AH3322Q-P-B?
All AH3322Q-P-B units undergo pre-shipment inspection (PSI). If there is an issue with AH3322Q-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 AH3322Q-P-B part is unused and in its original packaging.
Return procedure for AH3322Q-P-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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