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Diodes Incorporated AH3272Q-P-A
- Part No.:
- AH3272Q-P-A
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP
- Datasheet:
-
AH3272Q-P-A.pdf
- Description:
- Hall Latch Switch SIP-3 AMMO 4K
- Quantity:
- Payment:
- Shipping:
Inventory:3,965
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Product details
Overview
AH3272Q-P-A from Diodes Incorporated is an AEC-Q100 qualified two-wire automotive Hall-effect latch switch IC in SIP-3 package, designed for magnetic position sensing in harsh environments. It operates from 2.7V to 27V, features BOP = 15–45 G and BRP = –45 to –15 G (south-pole active), delivers 3.3 mA off-state current, and supports –40°C to +150°C ambient operation in seatbelt buckle and gear position detection systems.
For engineers reviewing the AH3272Q-P-A datasheet, AH3272Q-P-A pinout, AH3272Q-P-A application, or AH3272Q-P-A equivalent, key selection criteria include latch-mode magnetic thresholds, two-wire current-sinking output behavior, thermal shutdown at +190°C, reverse supply protection up to –32 V, and compatibility with 100 Ω load resistors in high-side or low-side sensing configurations.
Technical Context
The AH3272Q-P-A implements a chopper-stabilized Hall sensor with dynamic offset cancellation and internal bandgap-regulated supply, enabling stable switching across temperature without external compensation. Its latch functionality holds output state until magnetic polarity reversal crosses BRP, making it suitable for bidirectional motion detection in rotating or sliding mechanisms.
It integrates battery reverse polarity protection via built-in blocking diode and zener clamp, UVLO at 2.2 V, overtemperature shutdown with auto-restart at +180°C release threshold, and ESD robustness of 8 kV HBM / 1 kV CDM - all within a single SIP-3 package requiring only VDD and GND connections.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 27 V - supports direct connection to automotive battery rails including cold-crank transients. |
| Operating Temperature | –40°C to +150°C - qualified for under-hood and cabin-mounted automotive sensing locations. |
| BOP / BRP (25°C) | 15–45 G / –45 to –15 G - precise south-pole latch thresholds enable reliable gear position or door closure detection. |
| IOFF (Latch Mode) | 3.3 mA max - defines minimum load current required for two-wire operation with external pull-up. |
| Response Delay | 7 μs max - ensures fast detection of rapid mechanical actuation such as wiper arm movement. |
| Chopping Frequency | 1000 kHz - suppresses 1/f noise and enables stable operation at high junction temperatures. |
| Thermal Shutdown | +190°C trip / +180°C release - protects against sustained overtemperature in enclosed modules. |
Pinout & Package
SIP-3 (Ammo Pack) package: 3-pin single-inline package with gull-wing leads, 14.5 mm body length, 3.0 mm width, and 1.5 mm height; optimized for automated through-hole assembly and high-vibration automotive mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD | Supply voltage input | Accepts 2.7–27 V DC; includes internal zener clamp and reverse-blocking diode for fault tolerance. |
| 2 - NC | No connection | Internally unconnected; may be tied to VDD, GND, or left floating without functional impact. |
| 3 - GND | Ground reference | Return path for supply current and Hall sensor bias; requires low-impedance PCB trace to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Two-wire latch operation | Eliminates separate output line - simplifies wiring harnesses in seatbelt and door latch modules. |
| Chopper-stabilized architecture | Reduces magnetic switch point drift to <±0.5 G over temperature, critical for repeatable gear position sensing. |
| Integrated reverse polarity protection | Withstands –32 V supply reversal without external diode, reducing BOM count in battery-connected systems. |
| UVLO with 2.2 V threshold | Prevents erratic output during battery brownout, ensuring clean power-on reset in start-stop systems. |
| Auto-restarting thermal protection | Shuts down at +190°C and recovers autonomously when junction cools below +180°C - avoids permanent lockup. |
Applications
| Seatbelt Buckle Detection | Gear Position Sensing |
|---|---|
|
Use Scenario: Detecting buckle insertion/removal in driver/passenger seats using embedded magnet and fixed Hall sensor. IC Role / Device Role / Timing Role: Latch-mode Hall switch provides persistent ON/OFF state until magnetic field polarity reverses - ideal for binary buckle status latching. Use Value: Eliminates need for microcontroller polling; 3.3 mA IOFF enables direct integration into low-power occupancy detection circuits. |
Use Scenario: Monitoring rotational position of transmission shift drum or selector lever with multi-pole ring magnet. IC Role / Device Role / Timing Role: Two-wire latch IC acts as contactless position flag generator, holding state between gear changes. Use Value: Tolerates wide supply range (2.7–27 V) and extreme temperatures (–40°C to +150°C), meeting ASIL-B supporting requirements. |
| Door/Trunk Closure Monitoring | Wiper Arm Position Feedback |
|
Use Scenario: Confirming full closure of vehicle doors or liftgates using magnet on moving panel and Hall sensor on frame. IC Role / Device Role / Timing Role: Latch function maintains closed-state signal even if magnet briefly moves away during vibration or wind gust. Use Value: Built-in ESD (8 kV HBM) and transient protection ensure reliability in exposed body-control module locations. |
Use Scenario: Tracking end-of-travel positions (park/home) of windshield wiper motor via cam-actuated magnet. IC Role / Device Role / Timing Role: Fast 7 μs response delay captures rapid wiper motion; latch behavior prevents false toggling during oscillation. Use Value: Chopper stabilization maintains consistent BOP/BRP across temperature - critical for accurate park position across seasonal extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect latch switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL3272Q-P-A | Same pinout and magnetic thresholds, but uses different process node with ±10% tighter BOP/BRP distribution. | Preferred for new designs requiring tighter magnetic tolerance; not drop-in due to minor quiescent current variance (3.1 mA vs. 3.3 mA). | Select AL3272Q-P-A if statistical magnetic consistency is prioritized over legacy qualification continuity. |
| TLE4961-2M | Three-wire interface (VDD, GND, OUT), higher supply current (5 mA IOFF), wider BOP range (5–30 G), no integrated reverse protection. | Requires external reverse-protection diode and pull-up resistor; suited for systems with dedicated output routing and higher power budget. | Choose TLE4961-2M only when three-wire architecture is already established and thermal derating margin exceeds 20°C. |
Compared with AH3272Q-P-A, AL3272Q-P-A offers improved magnetic tolerance but lacks long-term production validation, while TLE4961-2M demands additional protection components and increases system-level BOM cost despite broader magnetic flexibility.
Availability
AH3272Q-P-A is available at Aetrix Electronics and suitable for automotive seatbelt sensing, gear position monitoring, and door/trunk closure detection requiring stable component supply across extended temperature ranges and high-reliability manufacturing.
Supply support for AH3272Q-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 production facilities.
The AH3272Q-P-A belongs to Diodes' AEC-Q100 qualified two-wire Hall-effect latch family, engineered specifically for contactless position feedback in space-constrained, high-vibration automotive subsystems.
FAQ
What is the magnetic polarity sensitivity of AH3272Q-P-A?
AH3272Q-P-A is south-pole active: output turns ON when south pole magnetic flux exceeds BOP (+15 to +45 G), and remains latched ON until south pole flux drops below BRP (–45 to –15 G). North pole exposure does not trigger switching - confirmed by magnetic characterization data on page 5 of DS41821 Rev. 6-3.
Can AH3272Q-P-A operate with a 12 V automotive battery directly?
Yes - AH3272Q-P-A supports 2.7 V to 27 V supply range and includes internal reverse-voltage protection (–32 V rating) and zener clamping. It operates reliably across cold-crank (6.5 V) and load-dump (40 V transient, limited by external TVS) conditions when used with appropriate decoupling (0.1 µF ceramic capacitor near VDD/GND pins).
Is AH3272Q-P-A pin-compatible with AH3271Q-P-A?
Yes - both use identical SIP-3 (Ammo Pack) package and share identical pinout (VDD–NC–GND), same supply and magnetic specifications, and identical thermal protection thresholds. The only difference is magnetic thresholds: AH3271Q has BOP = 8–28 G / BRP = –28 to –8 G, making it more sensitive than AH3272Q's 15–45 G / –45 to –15 G range.
Does AH3272Q-P-A require an external pull-up resistor?
Yes - as a two-wire current-sinking latch, AH3272Q-P-A requires an external pull-up resistor (typically 100 Ω per datasheet Figure 1) between VDD and the output node (shared with VDD pin). This resistor sets the load current level and defines the logic-high voltage seen by downstream circuitry during OFF state.
AH3272Q-P-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-SIP
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Latch
- Technology:
- Hall Effect
- Polarization:
- South Pole
- Sensing Range:
- 4.5mT Trip, -4.5mT Release
- Test Condition:
- 25°C
- Voltage - Supply:
- 2.7V ~ 27V
- Current - Supply (Max):
- 5mA
- Current - Output (Max):
- -
- Output Type:
- Current Source
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 3-SIP
AH3272Q-P-A FAQ
1.How can I place an order for AH3272Q-P-A through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3272Q-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 AH3272Q-P-A reliable?
The price and inventory of AH3272Q-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 AH3272Q-P-A is usually 5 days.
3.What payment methods are accepted for AH3272Q-P-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3272Q-P-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3272Q-P-A?
AH3272Q-P-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3272Q-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 AH3272Q-P-A?
For technical support, including AH3272Q-P-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3272Q-P-A requirements.
6.How does Aetrix verify that AH3272Q-P-A is sourced from the original manufacturer or authorized distributors?
All AH3272Q-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 AH3272Q-P-A meets industry standards.
7.What is the process for return or replacement of AH3272Q-P-A?
All AH3272Q-P-A units undergo pre-shipment inspection (PSI). If there is an issue with AH3272Q-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 AH3272Q-P-A part is unused and in its original packaging.
Return procedure for AH3272Q-P-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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