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Diodes Incorporated AH3322Q-W-7
- Part No.:
- AH3322Q-W-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AH3322Q-W-7.pdf
- Description:
- HALL UNIPOLAR SWITCH SC59 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:4,062
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Product details
Overview
AH3322Q-W-7 from Diodes Incorporated is an AEC-Q100 Grade 0 qualified high-voltage Hall-effect unipolar switch IC designed for automotive position and proximity sensing. It operates from 3.0V to 28V, features open-drain output with 60mA current limit, BOP/BRP of 15–45G/5–35G typical, and functions reliably from −40°C to +150°C in SC59 package. It is used in seatbelt buckle detection and steering lock immobilization systems.
For engineers reviewing the AH3322Q-W-7 datasheet, AH3322Q-W-7 pinout, AH3322Q-W-7 application, or AH3322Q-W-7 equivalent, key selection criteria include magnetic operate/release points, supply voltage range, open-drain drive capability, thermal derating in automotive under-hood environments, and polarity sensitivity relative to package marking side.
Technical Context
The AH3322Q-W-7 implements a chopper-stabilized Hall sensor with dynamic offset cancellation and internal bandgap-regulated biasing, delivering stable switching thresholds across temperature. Its architecture includes sample-and-hold amplification, low-pass filtering, and a power switch stage driving a single open-drain output.
Magnetic actuation requires South pole orientation toward the non-marking side of the SC59 package, with hysteresis (BHY) of 5–17G ensuring noise immunity. The device integrates reverse-blocking diode, zener clamps on VDD and OUTPUT, and overcurrent limiting-enabling direct connection to 12V/24V automotive buses without external protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0V to 28V - supports direct connection to 12V/24V automotive battery rails including load dump transients |
| Operating Temperature | −40°C to +150°C - qualified for engine bay and transmission control module mounting locations |
| BOP / BRP (Typ.) | 30G / 20G - enables reliable actuation with small, low-cost magnets at air gaps up to 3mm |
| Output Type | Open-drain, 60mA current-limited - compatible with standard pull-up resistors and microcontroller GPIO inputs |
| Startup Time | 10µs typical - ensures fast system response after power-on in safety-critical sensing paths |
| ESD Rating | HBM 8kV, CDM 1kV - meets stringent automotive ESD robustness requirements for assembly and field operation |
| Load Dump Protection | 40V transient rating - withstands ISO 7637-2 Pulse 5a without external TVS |
Pinout & Package
Package: SC59 - surface-mount, 3-pin, lead-free, RoHS-compliant package with 1.78mm × 2.05mm footprint and 0.915mm pitch; optimized for automated placement in automotive PCB assemblies.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Positive supply input - accepts 3.0V–28V DC; includes integrated reverse-blocking diode and 28V zener clamp |
| 2 | GND | Ground reference - connects to chassis or system ground plane; forms return path for Hall sensor and output stage |
| 3 | OUTPUT | Open-drain output - sinks up to 60mA when activated by sufficient South-pole magnetic flux; includes 28V zener clamp and overcurrent limit |
Key Features
| Feature | Design Value |
|---|---|
| Chopper stabilization | Reduces thermal drift of BOP/BRP to ±0.5G/°C, enabling stable switching across full −40°C to +150°C range |
| South-pole activation (SC59) | Requires magnet orientation toward non-marking side - eliminates ambiguity in mechanical integration with gear actuators and latches |
| Integrated protection | Reverse-blocking diode + VDD/output zener clamps eliminate need for external protection components in 12V/24V systems |
| AEC-Q100 Grade 0 | Qualified for ambient temperatures up to +150°C - suitable for transmission control units, HVAC compressors, and powertrain modules |
| RF noise immunity | Validated against ISO 11452-2 radiated immunity - maintains reliable operation in electrically noisy vehicle cabins and engine compartments |
Applications
| Seatbelt Buckle Detection | Steering Lock Immobilization |
|---|---|
Use Scenario: Detects insertion/removal of seatbelt tongue into buckle assembly using embedded magnet and PCB-mounted sensor. IC Role / Device Role / Timing Role: Unipolar Hall switch providing digital presence signal to body control module (BCM) with <10µs response latency. Use Value: Enables automatic pretensioner arming and occupant classification without mechanical switches or sliding contacts. | Use Scenario: Confirms physical engagement of steering column lock mechanism during vehicle start-up and shutdown sequences. IC Role / Device Role / Timing Role: Magnetic position sensor interfacing directly with immobilizer ECU via open-drain logic-level output. Use Value: Provides tamper-resistant, wear-free feedback for anti-theft system validation and driver authorization. |
| Gear Stick Position Sensing | Door/Trunk Closure Monitoring |
Use Scenario: Mounted adjacent to manual transmission gear lever to detect neutral, reverse, and forward gear positions. IC Role / Device Role / Timing Role: High-voltage Hall switch operating from 12V battery rail, immune to vibration-induced contact bounce. Use Value: Eliminates potentiometer wear and contact corrosion while supporting fail-safe neutral detection for start-enable logic. | Use Scenario: Integrated into door latch assemblies to report fully closed vs. ajar state to vehicle access control system. IC Role / Device Role / Timing Role: Proximity sensor with hysteresis (5–17G) rejecting false triggers from door panel flex or nearby metal objects. Use Value: Enables automatic interior lighting, alarm arming, and hands-free power liftgate activation without mechanical microswitches. |
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 |
|---|---|---|---|
| Melexis US1881EUA-ABA-000-RE | BOP/BRP 25–45G/15–35G; 3.5–24V supply; same SC59 package; no load dump rating | Lacks 40V transient protection - requires external TVS in 24V commercial vehicle designs | Select when cost sensitivity outweighs need for integrated load dump protection and AEC-Q100 Grade 0 qualification. |
| Allegro A1120ELHLT-T | BOP/BRP 20–40G/10–30G; 3.0–24V; SOT-23 package; HBM 4kV only | Lower ESD rating and narrower temp range (−40°C to +125°C) - unsuitable for under-hood transmission control modules | Choose only for cabin-grade applications where ambient temperature stays below +125°C and ESD exposure is controlled. |
Compared with US1881EUA-ABA-000-RE and A1120ELHLT-T, the AH3322Q-W-7 delivers superior automotive robustness via 40V load dump tolerance, AEC-Q100 Grade 0 qualification, and 8kV HBM ESD - making it the only option qualified for direct integration into powertrain and chassis control modules without supplemental protection.
Availability
AH3322Q-W-7 is available at Aetrix Electronics and suitable for seatbelt buckle detection, steering lock immobilization, and gear stick position sensing requiring stable component supply across automotive production lifecycles.
Supply support for AH3322Q-W-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 analog ICs, specializing in high-reliability solutions for automotive, industrial, and computing markets.
The AH332XQ product line targets automotive position sensing with AEC-Q100 Grade 0 qualification, wide supply voltage range, and integrated protection - specifically engineered for under-hood and chassis-mounted applications demanding long-term reliability.
FAQ
What is the correct magnet polarity and orientation for AH3322Q-W-7 activation?
The AH3322Q-W-7 in SC59 package requires a South pole oriented toward the non-part-marking side of the package to activate. This is opposite to SOT23 (Type S) and SIP-3 variants. Magnetic flux must be perpendicular to the package surface, with B > 30G (typ.) to switch the output low. Polarity misalignment causes failure to operate.
Does AH3322Q-W-7 require an external pull-up resistor?
Yes - the AH3322Q-W-7 has an open-drain output and requires an external pull-up resistor (typically 1kΩ to 10kΩ) between VDD and OUTPUT to establish a defined high state when inactive. Pull-up value affects rise time: RL = 1kΩ yields tR ≤ 1µs with 20pF load capacitance per datasheet characterization.
Can AH3322Q-W-7 operate directly from a 24V truck battery system?
Yes - the device is rated for continuous operation from 3.0V to 28V and withstands 40V load dump transients per ISO 7637-2 Pulse 5a. No external TVS or regulator is needed for 24V nominal systems, provided VDD is decoupled with a 10nF–100nF capacitor as specified in the typical application circuit.
How does the chopper stabilization architecture improve performance?
Chopper stabilization dynamically cancels offset voltage in the Hall element and amplifier chain, reducing BOP/BRP drift to <0.5G/°C over −40°C to +150°C. This eliminates calibration steps in production and ensures consistent magnetic threshold behavior across temperature - critical for safety-related seatbelt and gear position sensing.
AH3322Q-W-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:
- 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:
- Surface Mount
- Supplier Device Package:
- SC-59-3
AH3322Q-W-7 FAQ
1.How can I place an order for AH3322Q-W-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3322Q-W-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 AH3322Q-W-7 reliable?
The price and inventory of AH3322Q-W-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH3322Q-W-7 is usually 5 days.
3.What payment methods are accepted for AH3322Q-W-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3322Q-W-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3322Q-W-7?
AH3322Q-W-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3322Q-W-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 AH3322Q-W-7?
For technical support, including AH3322Q-W-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3322Q-W-7 requirements.
6.How does Aetrix verify that AH3322Q-W-7 is sourced from the original manufacturer or authorized distributors?
All AH3322Q-W-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 AH3322Q-W-7 meets industry standards.
7.What is the process for return or replacement of AH3322Q-W-7?
All AH3322Q-W-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH3322Q-W-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 AH3322Q-W-7 part is unused and in its original packaging.
Return procedure for AH3322Q-W-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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