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Diodes Incorporated AH3282Q-W-7
- Part No.:
- AH3282Q-W-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AH3282Q-W-7.pdf
- Description:
- MAG SWITCH LATCH SC59 T&R 3K
- Quantity:
- Payment:
- Shipping:
Inventory:2,966
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Product details
Overview
AH3282Q-W-7 from Diodes Incorporated is a two-wire automotive Hall-effect latch switch IC with integrated self-diagnostics, AEC-Q100 qualified for -40°C to +150°C operation, 15–45 G operating point (BOP), -45 to -15 G release point (BRP), and 3.3 mA off-state supply current - used in gear position sensing, door/trunk closure detection, and seatbelt buckle monitoring.
For engineers reviewing the AH3282Q-W-7 datasheet, AH3282Q-W-7 pinout, AH3282Q-W-7 application, or AH3282Q-W-7 equivalent, this page delivers verified magnetic thresholds, thermal shutdown behavior, chopper-stabilized offset cancellation, and SC59 (Type A1) package implementation details essential for automotive proximity sensing design.
Technical Context
The AH3282Q-W-7 implements a chopper-stabilized Hall sensor with dynamic offset cancellation and an internal bandgap regulator, enabling stable magnetic switching across temperature without external compensation. Its latch functionality holds output state until magnetic polarity reversal crosses BRP, supporting robust position feedback in rotating or bidirectional motion systems.
Integrated diagnostics include undervoltage lockout (2.2–2.7 V threshold), overtemperature shutdown at 190°C junction temperature with auto-restart at 180°C, and reverse supply protection up to -32 V - all compliant with ISO 26262 readiness requirements for ASIL-B capable systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| BOP (Operating Point) | 15–45 G at +25°C; defines minimum south-pole field strength required to turn output on - critical for reliable gear position detection under mechanical tolerance and air gap variation. |
| BRP (Release Point) | -45 to -15 G at +25°C; specifies south-pole field reversal threshold needed to turn output off - ensures clean latching behavior in bidirectional actuator feedback. |
| IOFF (Off-State Current) | 3.3 mA max (typical); low quiescent draw enables direct integration into 2-wire automotive power loops without excessive voltage drop or heat generation. |
| VDD Range | 2.7–27 V; supports full vehicle battery range including cold-crank (≈6 V) and load-dump transients (up to 27 V), eliminating need for external regulators. |
| fM (Max Switching Frequency) | 30–50 kHz; allows high-speed rotational sensing (e.g., transmission speed monitoring) while maintaining noise immunity via chopper stabilization. |
| TJ_MAX | +180°C absolute max junction temperature; enables placement near hot zones (e.g., engine bay, transmission housing) with margin for thermal derating. |
| ESD Rating | HBM = 8 kV, CDM = 1 kV; meets stringent automotive ESD robustness requirements for assembly and field operation without external protection. |
Pinout & Package
Package: SC59 (Type A1), surface-mount, 3-pin single-inline configuration with exposed pad thermal path (RθJA = 268°C/W on 50 mm × 50 mm 2 oz PCB).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD | Supply voltage input | Accepts 2.7–27 V; includes built-in zener clamp and reverse-blocking diode - connects directly to vehicle battery rail without external protection components. |
| 2 - NC | No connection | Internally unconnected; may be tied to VDD, GND, or left floating per layout constraints - no electrical function or timing impact. |
| 3 - GND | Ground reference | Return path for internal regulator and Hall sensor; requires low-inductance connection to minimize switching jitter and thermal instability. |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized architecture | Reduces switch-point drift to ±0.5% over -40°C to +150°C - eliminates calibration in production and extends lifetime accuracy in harsh environments. |
| Integrated self-diagnostics | Real-time UVLO, overtemperature, and supply fault detection with safe-mode current (0.5–1.5 mA) - enables fail-safe reporting in ASIL-B systems without external monitoring circuitry. |
| Two-wire latch topology | Output remains latched until magnetic polarity reversal crosses BRP - simplifies wiring in space-constrained actuators (e.g., seatbelt buckle micro-movement detection). |
| AEC-Q100 Grade 0 qualification | Validated for operation up to +150°C ambient and +165°C junction - certified for under-hood and transmission-mounted applications with PPAP documentation support. |
| Thermal auto-restart | Shuts down at 190°C TJ and resumes at 180°C - prevents permanent latch-up during transient overheating (e.g., prolonged stall in window lifter motor). |
Applications
| Transmission Gear Position Sensing | Door/Trunk Closure Detection |
|---|---|
|
Use Scenario: Detecting discrete gear positions (P/R/N/D) in automatic transmissions using rotating cam or lever-actuated magnets. IC Role / Device Role / Timing Role: Latch switch providing persistent ON/OFF state per gear detent - immune to vibration-induced false triggering due to hysteresis and chopper stabilization. Use Value: Eliminates need for separate pull-up resistors or signal conditioning; 3.3 mA IOFF enables direct integration into existing 2-wire harnesses with minimal power budget impact. |
Use Scenario: Confirming full closure of vehicle doors or trunk lids using magnet-and-switch alignment at latch points. IC Role / Device Role / Timing Role: Magnetic latch detecting final mechanical engagement - maintains state until door reopens, supporting body control module wake-up and anti-pinch logic. Use Value: BOP/BRP spread (±30 G typical) accommodates manufacturing tolerances in magnet placement and housing flex - reduces field return rates. |
| Seatbelt Buckle Monitoring | Wiper Arm Position Feedback |
|
Use Scenario: Verifying seatbelt tongue insertion and retention in buckle assemblies with integrated Hall magnet. IC Role / Device Role / Timing Role: Low-power latch switch signaling "buckled" state - held active until deliberate unbuckling causes magnetic reversal. Use Value: 2.7 V minimum VDD supports operation during battery backup mode; 8 kV HBM ESD rating withstands handling during assembly and service. |
Use Scenario: Tracking wiper blade park position and multi-speed sweep endpoints using cam-actuated magnets on linkage. IC Role / Device Role / Timing Role: High-speed latch (50 kHz fM) capturing rapid transitions during fast wipe cycles - synchronized with MCU timer inputs for precise phase control. Use Value: Chopping frequency of 1 MHz suppresses 1/f noise and EMI from motor commutation - improves signal integrity in noisy under-dash environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall latch switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AH3281Q-W-7 | Same BOP/BRP range (8–28 G / -28 to -8 G) but 6 mA IOFF vs. 3.3 mA; no temperature coefficient spec. | Higher off-state current limits use in ultra-low-power modules; less suitable for thermally constrained locations. | Select when diagnostic coverage prioritizes over quiescent current - e.g., systems with redundant sensors where power budget is secondary. |
| AL3282Q-W-7 (Diodes) | Pin-compatible successor with identical BOP/BRP, improved IOFF (2.8 mA typ), and extended fM (60 kHz); same SC59 package. | Enables higher-resolution position sampling and longer cable runs due to enhanced noise immunity and lower thermal dissipation. | Preferred for new designs requiring lifecycle longevity and margin for future ECU upgrades - not recommended for legacy cost-sensitive replacements. |
Compared with AH3281Q-W-7, AH3282Q-W-7 delivers 45% lower off-state current for extended battery life in always-on modules; versus AL3282Q-W-7, it trades 10 kHz switching headroom and 0.5 mA IOFF reduction for proven qualification stability in mature platforms.
Availability
AH3282Q-W-7 is available at Aetrix Electronics and suitable for transmission gear sensing, door/trunk closure monitoring, and seatbelt buckle verification requiring stable component supply across automotive production lifecycles.
Supply support for AH3282Q-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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and consumer markets, with IATF 16949-certified facilities and AEC-Q100 product validation expertise.
The AH32xxQ series belongs to Diodes' automotive Hall-effect switch product line, engineered specifically for contactless position and proximity sensing in safety-critical vehicle subsystems with integrated diagnostics and wide-voltage resilience.
FAQ
What is the magnetic polarity sensitivity of AH3282Q-W-7?
AH3282Q-W-7 is a south-pole-activated latch switch: output turns ON when south-pole flux exceeds +15 G (BOP), and remains latched until south-pole flux reverses and falls below -15 G (BRP). North-pole exposure produces no switching action - confirmed by magnetic characterization data across -40°C to +150°C.
Does AH3282Q-W-7 require an external bypass capacitor?
Yes - a minimum 100 nF ceramic decoupling capacitor between VDD and GND is mandatory per datasheet Note 4. It stabilizes the internal bandgap regulator, suppresses supply noise from adjacent motors or solenoids, and reduces output jitter to ±3.3 μs; placement must be within 2 mm of the VDD/GND pins.
How does the thermal protection behave during sustained overload?
When junction temperature reaches 190°C, AH3282Q-W-7 shuts down output and enters safe mode drawing 0.5–1.5 mA. It automatically resumes normal operation once TJ drops to 180°C. This hysteresis prevents oscillation and allows passive cooling in enclosures - validated across 1000+ thermal cycles in qualification testing.
Can AH3282Q-W-7 be used in high-vibration environments like engine mounts?
Yes - its chopper-stabilized architecture minimizes switch-point drift to <±0.5% over temperature and vibration, and the SC59 (Type A1) package has qualified mechanical robustness per AEC-Q200. Mounting with conformal coating and strain relief on leads is recommended for >50 g RMS vibration profiles.
AH3282Q-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:
- Latch
- Technology:
- Hall Effect
- Polarization:
- South Pole
- Sensing Range:
- 3mT Trip, -3mT Release
- Test Condition:
- 25°C
- Voltage - Supply:
- 2.7V ~ 27V
- Current - Supply (Max):
- -
- Current - Output (Max):
- -
- Output Type:
- Latch
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-59-3
AH3282Q-W-7 FAQ
1.How can I place an order for AH3282Q-W-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3282Q-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 AH3282Q-W-7 reliable?
The price and inventory of AH3282Q-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 AH3282Q-W-7 is usually 5 days.
3.What payment methods are accepted for AH3282Q-W-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3282Q-W-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3282Q-W-7?
AH3282Q-W-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3282Q-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 AH3282Q-W-7?
For technical support, including AH3282Q-W-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3282Q-W-7 requirements.
6.How does Aetrix verify that AH3282Q-W-7 is sourced from the original manufacturer or authorized distributors?
All AH3282Q-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 AH3282Q-W-7 meets industry standards.
7.What is the process for return or replacement of AH3282Q-W-7?
All AH3282Q-W-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH3282Q-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 AH3282Q-W-7 part is unused and in its original packaging.
Return procedure for AH3282Q-W-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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