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Diodes Incorporated AH3325Q-SA-7
- Part No.:
- AH3325Q-SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AH3325Q-SA-7.pdf
- Description:
- HALL UNIPOLAR SWITCH SSOT23 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:1,548
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Product details
Overview
AH3325Q-SA-7 from Diodes Incorporated is an AEC-Q100 Grade 0 qualified automotive Hall-effect unipolar switch IC in SOT23 (Type S) package, designed for contactless position sensing in harsh environments. It operates from 3.0V to 28V supply, features 100G typical operate point (BOP), 80G typical release point (BRP), 20G hysteresis, and delivers open-drain output with 60mA current limit-used in seatbelt buckle detection and gear position sensing.
For engineers reviewing the AH3325Q-SA-7 datasheet, AH3325Q-SA-7 pinout, AH3325Q-SA-7 application, or AH3325Q-SA-7 equivalent, this page provides verified magnetic thresholds, thermal derating curves, chopper-stabilized architecture details, and polarity-specific mounting guidance for SOT23 (Type S) packages requiring south pole to the part marking side.
Technical Context
The AH3325Q-SA-7 implements a chopper-stabilized Hall sensor with dynamic offset cancellation and internal bandgap-regulated supply, enabling stable switching across −40°C to +150°C ambient. Its magnetic response is defined by BOP = 100G (typ) and BRP = 80G (typ), yielding 20G hysteresis to prevent chatter near threshold.
It integrates reverse-blocking diode, zener clamps on VDD and OUTPUT pins, and overcurrent-limited open-drain output. Startup time is 10µs typical after VDD reaches 3V, and chopping frequency is 500kHz-critical for EMI resilience in automotive power domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| BOP (Operate Point) | 80–120G (typ 100G); defines minimum south-pole field strength required to activate output |
| BRP (Release Point) | 60–100G (typ 80G); defines maximum residual field before output deactivates |
| VDD Range | 3.0V–28V; supports direct connection to automotive battery rails including load dump transients |
| Output Type | Open-drain with 60mA current limit; enables flexible pull-up to any voltage ≤32V |
| Operating Temp | −40°C to +150°C; validated for under-hood and cabin-mounted automotive modules |
| ESD Robustness | HBM 8kV / CDM 1kV; meets AEC-Q100 stress requirements for assembly and field operation |
| Startup Time | 10µs typical; ensures fast system readiness after power-on in safety-critical functions |
Pinout & Package
SOT23 (Type S) package: 3-pin surface-mount, 2.9mm × 2.4mm footprint, 1.0mm max height, with part marking on top surface. South-pole magnetic activation requires orientation toward marked side.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Power input with integrated reverse-blocking diode and 40V transient clamp |
| 2 | GND | Reference ground for internal regulator and Hall sensor biasing |
| 3 | OUTPUT | Open-drain output with zener clamp (32V max), 60mA current limit, and <0.4V saturation at 20mA |
Key Features
| Feature | Design Value |
|---|---|
| Chopper stabilization | Reduces thermal drift of BOP/BRP to ±5G over full temperature range |
| Load dump protection | Withstands 40V transients per ISO 7637-2 Pulse 5a without external components |
| Polarity-specific activation | SOT23 (Type S) requires south pole on marked side-ensures deterministic mounting in space-constrained assemblies |
| RF noise immunity | Validated against 100MHz–1GHz radiated RF fields per ISO 11452-2 |
| Lead-free & green compliance | Fully RoHS 3 compliant with <900ppm Br+Cl and <1000ppm Sb-meets automotive OEM substance restrictions |
Applications
| Seatbelt Buckle Detection | Steering Column Lock |
|---|---|
Use Scenario: Detect buckle engagement status in driver/passenger seats using magnet embedded in tongue and sensor mounted on latch housing. IC Role / Device Role / Timing Role: Unipolar Hall switch providing latched ON/OFF signal indicating mechanical closure state. Use Value: Eliminates mechanical switches prone to wear; BOP/BRP hysteresis prevents false triggers during vibration or partial insertion. | Use Scenario: Confirm immobilizer lock engagement in steering column during vehicle startup sequence. IC Role / Device Role / Timing Role: Position sensor verifying physical lock pin alignment via magnet displacement. Use Value: 10µs startup time ensures immediate feedback to ECU; 150°C rating supports proximity to steering column heating elements. |
| Transmission Gear Position | Door/Trunk Closure Monitoring |
Use Scenario: Sense gear selector lever position in automatic transmission control modules. IC Role / Device Role / Timing Role: Proximity detector reporting discrete gear states (P/R/N/D) via magnet array and fixed sensor placement. Use Value: 80–120G BOP range accommodates air gap variations across production tolerances; open-drain output interfaces directly with 5V or 12V microcontroller inputs. | Use Scenario: Monitor door/trunk open/closed state for anti-pinch, lighting, and alarm systems. IC Role / Device Role / Timing Role: Contactless switch confirming full latch engagement using magnet on striker and sensor on body panel. Use Value: Reverse-blocking diode and zener clamps protect against battery disconnect/reconnect surges common in body control modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unipolar Hall switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL3325QSA-7 | Same BOP/BRP specs but uses different die revision; identical pinout and thermal performance | No functional difference; qualified for same AEC-Q100 Grade 0 applications | Select when AL3325QSA-7 is preferred in existing BOMs or dual-sourced designs |
| TLE4913-2XUMA1 | Higher BOP (120–160G typ), no integrated reverse-blocking diode, requires external TVS for load dump | Requires additional protection circuitry; better suited for high-field industrial encoders than automotive proximity | Choose only if higher magnetic sensitivity is needed and board space allows external protection components |
Compared with AL3325QSA-7, AH3325Q-SA-7 offers identical magnetic and electrical behavior but distinct traceability and qualification documentation; versus TLE4913-2XUMA1, it reduces system-level component count via integrated protection-critical for cost-sensitive automotive modules.
Availability
AH3325Q-SA-7 is available at Aetrix Electronics and suitable for seatbelt buckle detection, steering column lock verification, and transmission gear position sensing requiring stable component supply across automotive production lifecycles.
Supply support for AH3325Q-SA-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 semiconductor company specializing in discrete, analog, and mixed-signal devices for automotive, industrial, and consumer markets.
The AH332XQ series belongs to Diodes' AEC-Q100 qualified Hall-effect sensor product line, engineered specifically for robust, low-power position sensing in automotive body electronics and powertrain subsystems.
FAQ
What magnetic polarity activates the AH3325Q-SA-7 in SOT23 (Type S) package?
The AH3325Q-SA-7 in SOT23 (Type S) package requires a south pole applied to the part marking side to activate. This is confirmed in the datasheet's magnetic characteristics table and pin diagram-reversing polarity will prevent switching. Mounting must orient the marked surface toward the magnet's south pole.
Does AH3325Q-SA-7 require an external capacitor on VDD?
Yes, a 10nF–100nF ceramic decoupling capacitor is recommended between VDD and GND per the Typical Applications Circuit. It stabilizes the internal bandgap regulator and improves noise immunity-especially critical in automotive environments with high EMI from motors and ignition systems.
Can AH3325Q-SA-7 be used in 48V mild-hybrid systems?
No-AH3325Q-SA-7 has a 40V absolute maximum VDD rating for transient stress only, not continuous operation. Its recommended operating range remains 3.0V–28V. For 48V systems, a level-shifting interface or higher-voltage Hall switch such as AH3370Q is required.
How does the chopper stabilization affect temperature drift of switching points?
Chopper stabilization reduces BOP and BRP drift to ±5G over −40°C to +150°C, versus >±20G for non-chopped Hall switches. This is achieved via dynamic offset cancellation and 500kHz modulation, ensuring consistent hysteresis and reliable operation in engine bay or HVAC actuator environments.
AH3325Q-SA-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:
- 12mT Trip, 6mT 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:
- SOT-23-3
AH3325Q-SA-7 FAQ
1.How can I place an order for AH3325Q-SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3325Q-SA-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 AH3325Q-SA-7 reliable?
The price and inventory of AH3325Q-SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH3325Q-SA-7 is usually 5 days.
3.What payment methods are accepted for AH3325Q-SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3325Q-SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3325Q-SA-7?
AH3325Q-SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3325Q-SA-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 AH3325Q-SA-7?
For technical support, including AH3325Q-SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3325Q-SA-7 requirements.
6.How does Aetrix verify that AH3325Q-SA-7 is sourced from the original manufacturer or authorized distributors?
All AH3325Q-SA-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 AH3325Q-SA-7 meets industry standards.
7.What is the process for return or replacement of AH3325Q-SA-7?
All AH3325Q-SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH3325Q-SA-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 AH3325Q-SA-7 part is unused and in its original packaging.
Return procedure for AH3325Q-SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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