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Diodes Incorporated AH3234Q-P-A
- Part No.:
- AH3234Q-P-A
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP, Formed Leads
- Datasheet:
-
AH3234Q-P-A.pdf
- Description:
- HALL UNIPOLAR SWITCH SIP-3 AMMO
- Quantity:
- Payment:
- Shipping:
Inventory:3,940
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Product details
Overview
AH3234Q-P-A from Diodes Incorporated is an AEC-Q100 qualified, two-wire automotive Hall-effect unipolar switch IC with inverted output polarity, operating from 2.7V to 27V supply, ±3.3μs output jitter, and -40°C to +150°C ambient range; used for seatbelt buckle detection and door/trunk closure sensing in harsh-temperature vehicle systems.
For engineers reviewing the AH3234Q-P-A datasheet, AH3234Q-P-A pinout, AH3234Q-P-A application, or AH3234Q-P-A equivalent, this page delivers verified magnetic thresholds (BOP = 27–63 G, BRP = 10–46 G), chopper-stabilized architecture, thermal shutdown at +190°C, reverse supply protection (-32V), and SIP-3 package pin mapping - all critical for automotive proximity sensor design validation.
Technical Context
The AH3234Q-P-A implements a chopper-stabilized Hall sensor with dynamic offset cancellation and internal bandgap regulator, delivering temperature-compensated operation across -40°C to +150°C. Its unipolar switching behavior responds exclusively to south-pole magnetic fields exceeding BOP (27–63 G), holding output until flux falls below BRP (10–46 G).
It features built-in reverse-blocking diode with zener clamp on VDD, UVLO activation at 2.2V, and overtemperature shutdown at +190°C junction temperature with auto-restart at +180°C. The device draws 5–6.9mA off-state current and 12–17mA on-state current across its full 2.7V–27V supply range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 27V - supports direct battery connection in 12V/24V automotive systems without external regulation. |
| BOP / BRP (25°C) | 27–63 G / 10–46 G - defines precise magnetic actuation and release thresholds for reliable unipolar position sensing. |
| Output Polarity | Inverted - output current turns ON when south pole exceeds BOP, ideal for active-low logic interface in safety-critical closures. |
| Temperature Range | -40°C to +150°C ambient - validated for under-hood and cabin-mounted automotive locations per AEC-Q100 Grade 0. |
| ESD Rating | HBM = 8kV, CDM = 1kV - ensures robustness against assembly and field electrostatic discharge events. |
| Thermal Protection | Shuts down at TJ = +190°C, restarts at +180°C - prevents permanent damage during sustained high-temperature operation. |
| UVLO Threshold | 2.2V - blocks erroneous switching during cold-cranking or low-battery conditions. |
Pinout & Package
Package: SIP-3 (Ammo Pack), 3-pin single-inline package with straight leads, optimized for through-hole mounting in automotive harness assemblies and PCB edge-mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD | Supply voltage input | Accepts 2.7V–27V DC; includes integrated reverse-blocking diode and zener clamp for ±32V transient tolerance. |
| 2 - NC | No connection | Internally unconnected; may be tied to VDD, GND, or left floating - no electrical impact on operation. |
| 3 - GND | Ground reference | Return path for supply current and Hall sensor bias; requires low-inductance layout for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized architecture | Reduces switch point drift to <±0.5G over temperature, enabling stable position detection without calibration. |
| Two-wire current-loop interface | Eliminates separate signal line - simplifies wiring harnesses and reduces connector count in seatbelt and door modules. |
| Inverted output polarity | Enables direct compatibility with existing pull-up resistor networks and failsafe monitoring circuits in OEM architectures. |
| AEC-Q100 Grade 0 qualification | Validated for 150°C ambient operation and PPAP-capable manufacturing in IATF 16949 certified facilities. |
| Integrated protection suite | Combines reverse-voltage blocking, UVLO, ESD (8kV HBM), and thermal shutdown - removes need for external protection components. |
Applications
| Seatbelt Buckle Detection | Door/Trunk Closure Sensing |
|---|---|
|
Use Scenario: Detect buckle insertion status in driver/passenger seats using embedded magnet and PCB-mounted sensor. IC Role / Device Role / Timing Role: Unipolar Hall switch providing current-sinking output state change upon south-pole proximity. Use Value: Enables fail-safe occupant classification and airbag suppression logic with <±3.3μs timing jitter and guaranteed operation at 150°C ambient. |
Use Scenario: Monitor door or trunk lid open/closed state via magnet mounted on moving panel and sensor on fixed frame. IC Role / Device Role / Timing Role: Two-wire proximity detector generating analog-current-level output proportional to magnetic presence. Use Value: Reduces wiring complexity by 50% versus three-wire solutions while maintaining ASIL-B compatible reliability per ISO 26262 functional safety requirements. |
| Wiper Position Feedback | Gear Selector Position Sensing |
|
Use Scenario: Track wiper arm end-stop position in intermittent or park-mode operation using cam-actuated magnet. IC Role / Device Role / Timing Role: Magnetic threshold comparator with 7μs response delay and 28–40μs power-on stabilization. Use Value: Ensures accurate park positioning across -40°C to +150°C without recalibration, supporting IP6K9K-rated motor housings. |
Use Scenario: Sense gear lever position in automatic transmission control units using multi-pole magnet array and discrete Hall sensors. IC Role / Device Role / Timing Role: Unipolar latch-free switch providing deterministic ON/OFF transition at defined BOP/BRP points. Use Value: Delivers <100ppm/°C effective magnetic hysteresis stability, eliminating false gear-read errors during thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unipolar Hall switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AH3233Q-P-A | Same SIP-3 package and inverted output, but lower BOP (20–70 G) and BRP (3–53 G); identical -1100 ppm/°C tempco. | More sensitive to weak magnetic fields; better suited for small-gap or low-strength magnet designs. | Select AH3233Q-P-A if system magnet strength is ≤40G; otherwise AH3234Q-P-A provides higher noise margin. |
| AH3232Q-P-A | Direct-output polarity, same supply range and thermal specs; BOP/BRP shifted to 30–90 G / 10–70 G. | Requires inverted logic interface redesign; offers wider magnetic hysteresis for vibration-prone environments. | Choose AH3232Q-P-A only when legacy circuitry mandates active-high output or higher hysteresis is needed. |
Compared with AH3233Q-P-A and AH3232Q-P-A, the AH3234Q-P-A provides optimal balance of magnetic sensitivity, noise immunity, and inverted output compatibility for seatbelt and closure sensing - making it the preferred choice where magnet strength is moderate (40–60G) and fail-safe sinking behavior is required.
Availability
AH3234Q-P-A is available at Aetrix Electronics and suitable for automotive seatbelt detection, door/trunk closure monitoring, and wiper position feedback requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AH3234Q-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 manufacturer of discrete semiconductors and ICs, specializing in high-reliability automotive, industrial, and power management solutions with IATF 16949-certified production.
The AH323xQ series belongs to Diodes' automotive Hall-effect sensor product line, engineered specifically for contactless position and proximity sensing in AEC-Q100-compliant vehicle subsystems.
FAQ
What is the magnetic polarity requirement for AH3234Q-P-A operation?
The AH3234Q-P-A is a south-pole-activated unipolar switch: it turns ON only when a south magnetic pole exceeds its BOP threshold (27–63 G at 25°C). North pole exposure produces no response. This behavior is confirmed in the magnetic characteristics table and functional block diagram of DS41821 Rev. 6–3.
Does AH3234Q-P-A require an external decoupling capacitor?
Yes - a minimum 100nF ceramic capacitor must be placed between VDD and GND, located as close as possible to the IC pins. This is mandatory for power stabilization and noise immunity, as specified in the Typical Applications Circuit section and Note 4 of the datasheet.
Can AH3234Q-P-A be used in high-vibration environments like transmission actuators?
Yes - its chopper-stabilized architecture minimizes switch-point drift (<±0.5G over temperature), and its 7μs response delay plus 30–50kHz max switching frequency support reliable operation in mechanically noisy transmission position sensing, provided magnet alignment remains within ±0.3mm tolerance.
Is AH3234Q-P-A pin-compatible with AH3231Q-P-A?
Yes - both use identical SIP-3 (Ammo Pack) packaging and share identical pinout (VDD–NC–GND), but differ in magnetic thresholds and output polarity: AH3231Q-P-A has higher BOP/BRP (55–135 G / 35–115 G) and inverted output, while AH3234Q-P-A offers lower thresholds (20–70 G / 3–53 G) with same inversion - enabling direct replacement where sensitivity matching is verified.
AH3234Q-P-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-SIP, Formed Leads
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Function:
- Latch, Unipolar Switch
- Technology:
- Hall Effect
- Polarization:
- South Pole
- Sensing Range:
- 7mT Trip, 0.3mT Release
- Test Condition:
- -40°C ~ 150°C
- Voltage - Supply:
- 2.7V ~ 27V
- Current - Supply (Max):
- 6.9mA
- Current - Output (Max):
- -
- Output Type:
- Switch
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 3-SIP
AH3234Q-P-A FAQ
1.How can I place an order for AH3234Q-P-A through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3234Q-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 AH3234Q-P-A reliable?
The price and inventory of AH3234Q-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 AH3234Q-P-A is usually 5 days.
3.What payment methods are accepted for AH3234Q-P-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3234Q-P-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3234Q-P-A?
AH3234Q-P-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3234Q-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 AH3234Q-P-A?
For technical support, including AH3234Q-P-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3234Q-P-A requirements.
6.How does Aetrix verify that AH3234Q-P-A is sourced from the original manufacturer or authorized distributors?
All AH3234Q-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 AH3234Q-P-A meets industry standards.
7.What is the process for return or replacement of AH3234Q-P-A?
All AH3234Q-P-A units undergo pre-shipment inspection (PSI). If there is an issue with AH3234Q-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 AH3234Q-P-A part is unused and in its original packaging.
Return procedure for AH3234Q-P-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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