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Diodes Incorporated AH3232Q-P-A
- Part No.:
- AH3232Q-P-A
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP
- Datasheet:
-
AH3232Q-P-A.pdf
- Description:
- Hall Unipolar Switch SIP-3 AMMO
- Quantity:
- Payment:
- Shipping:
Inventory:3,999
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Product details
Overview
AH3232Q-P-A from Diodes Incorporated is an AEC-Q100 qualified, two-wire automotive Hall-effect unipolar switch IC in SIP-3 package, designed for position sensing in seatbelt buckles and gear position detection. It operates from 2.7V to 27V, features direct-output polarity, -1100 ppm/°C temperature coefficient, and 6 mA off-state supply current (IOFF) at full temperature range (-40°C to +150°C).
For engineers reviewing the AH3232Q-P-A datasheet, AH3232Q-P-A pinout, AH3232Q-P-A application, or AH3232Q-P-A equivalent, key selection criteria include magnetic operating point (BOP = 40–80 G), release point (BRP = 20–60 G), thermal shutdown threshold (+190°C), chopper-stabilized architecture for drift mitigation, and built-in reverse-voltage and ESD protection (HBM = 8 kV).
Technical Context
The AH3232Q employs a chopper-stabilized Hall sensor with dynamic offset cancellation and internal bandgap regulator, delivering stable switching thresholds across -40°C to +150°C ambient. Its unipolar response activates on south-pole magnetic field exceeding BOP (typ. 60 G) and releases when flux falls below BRP (typ. 40 G).
Two-wire operation integrates power and signal on a single loop: output current switches between IOFF ≈ 6 mA (off) and ION ≈ 14.5 mA (on), enabling direct interface with vehicle body control modules without external pull-up resistors. UVLO (2.2–2.7 V) and overtemperature shutdown (+190°C trip, +180°C release) ensure robustness in harsh automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 27 V - supports full automotive battery range including cold-crank (6.5 V) and load-dump (27 V) transients. |
| Operating Point (BOP) | 40–80 G (typ. 60 G) - defines minimum south-pole field strength required to turn output on; enables reliable detection with small magnets. |
| Release Point (BRP) | 20–60 G (typ. 40 G) - defines maximum residual field before output turns off; ensures clean hysteresis for noise immunity. |
| Temperature Coefficient | -1100 ppm/°C - quantifies BOP/BRP drift per degree; enables predictable performance across full -40°C to +150°C junction range. |
| Supply Current (Off) | 5–6.9 mA - determines baseline loop current in inactive state; compatible with standard 6–10 mA automotive wake-up thresholds. |
| Supply Current (On) | 12–17 mA - defines active-state loop current; provides sufficient signal margin for BCM current-sense detection. |
| Chopping Frequency | 1000 kHz - eliminates 1/f noise and offsets; ensures <±3.3 μs jitter in repetitive switching under 1 kHz field excitation. |
| ESD Rating | HBM = 8 kV, CDM = 1 kV - exceeds ISO 10605 requirements for in-vehicle assembly and service handling. |
Pinout & Package
Package: SIP-3 (Ammo Pack), 3-pin single-inline package with spread leads; thermally optimized for PCB mounting (RθJA = 143 °C/W on 50 mm × 50 mm 2 oz copper).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD | Supply voltage input | Accepts 2.7–27 V DC; includes integrated reverse-blocking diode and zener clamp for ±32 V transient 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 and output current; must be low-impedance to support 17 mA peak current and minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized architecture | Reduces magnetic switch-point drift to <±0.5 G over temperature, eliminating need for external calibration in production. |
| Integrated bandgap regulator | Stabilizes internal circuitry supply independent of VDD variation, ensuring consistent timing and threshold behavior from 2.7 V to 27 V. |
| Two-wire current-loop interface | Eliminates separate signal line; simplifies wiring harness and reduces connector pins in seatbelt or door closure modules. |
| Automotive-grade protection suite | Includes UVLO, overtemperature shutdown with auto-restart, reverse-polarity blocking, and 32 V transient tolerance - meets ISO 7637-2 Pulse 1/2a/5a requirements. |
| AEC-Q100 Grade 0 qualification | Validated for operation up to +150°C ambient and +165°C junction; supports engine bay, transmission, and under-hood applications. |
Applications
| Seatbelt Buckle Detection | Transmission Gear Position Sensing |
|---|---|
|
Use Scenario: Detect buckle engagement status in driver/passenger seat assemblies using a magnet embedded in the tongue and Hall sensor mounted in the receptacle. IC Role / Device Role / Timing Role: Two-wire unipolar switch providing current-loop ON/OFF signal directly to body control module (BCM) via shared power/sense wire. Use Value: Enables fail-safe occupant classification for airbag deployment logic; -40°C to +150°C operation ensures reliability during hot-soak conditions. |
Use Scenario: Monitor mechanical gear selector position in automatic transmissions by detecting magnet movement across discrete detent positions. IC Role / Device Role / Timing Role: Unipolar latch-free switch generating current-state signal synchronized to gear actuation timing; no memory required. Use Value: Eliminates potentiometer wear and contact bounce; 30–50 kHz max switching frequency supports rapid gear-shift transitions. |
| Door/Trunk Closure Monitoring | Wiper Arm Position Feedback |
|
Use Scenario: Confirm full closure of vehicle doors or liftgates using magnet-on-latch and sensor-on-frame configuration. IC Role / Device Role / Timing Role: Proximity sensor reporting closed/open state via two-wire current loop to door module; immune to moisture and dust ingress. Use Value: Supports auto-lock/unlock and interior lighting control; built-in ESD and transient protection prevents field failures in exposed locations. |
Use Scenario: Determine wiper blade park position at end-of-cycle using magnet on linkage and Hall sensor on motor housing. IC Role / Device Role / Timing Role: High-sensitivity unipolar switch triggering precise park detection within ±2° mechanical tolerance. Use Value: Enables soft-stop wiper control and anti-stall logic; 40–80 G BOP allows use of compact ferrite magnets even with air-gap variations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar two-wire Hall-effect unipolar switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Allegro A3212LLHLT-T | Three-wire operation (VDD, GND, OUT); requires external pull-up; BOP = 35–75 G; no integrated reverse-protection diode. | Not drop-in compatible due to pin count and wiring topology; suited for designs with dedicated signal lines and external protection. | Select if existing layout supports three-wire interface and higher ESD tolerance (16 kV HBM) is prioritized over wiring simplicity. |
| Melexis US5881LUA-ABA-000-RE | Two-wire, but latch-type output (not unipolar); BOP = 15–35 G; BRP = -35 to -15 G; lower supply current (ION = 8 mA). | Requires magnetic polarity reversal for reset; unsuitable for simple proximity detection where only presence/absence matters. | Prefer only for applications needing latching behavior (e.g., rotary position encoding), not for seatbelt or door closure. |
Compared with AH3232Q-P-A, A3212 requires redesign of harness and protection circuitry, while US5881's latching behavior introduces unnecessary complexity for unipolar sensing tasks - making AH3232Q-P-A the optimal choice for cost-sensitive, wiring-constrained automotive proximity detection.
Availability
AH3232Q-P-A is available at Aetrix Electronics and suitable for seatbelt buckle detection, transmission gear position sensing, and door/trunk closure monitoring requiring stable component supply across automotive production lifecycles.
Supply support for AH3232Q-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 company specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and computing markets, with IATF 16949-certified manufacturing.
AH3232Q-P-A belongs to the AH32xxQ automotive Hall-effect switch product line, engineered specifically for robust, two-wire position sensing in safety-critical vehicle subsystems under extreme thermal and electrical stress.
FAQ
What is the magnetic polarity requirement for AH3232Q-P-A activation?
AH3232Q-P-A is a south-pole-activated unipolar switch: it turns on when a south magnetic pole approaches the marked surface of the SIP-3 package (B > BOP, typ. 60 G) and turns off when flux drops below BRP (typ. 40 G). North-pole exposure produces no response. The device does not require polarity reversal for reset - unlike latch types.
Can AH3232Q-P-A operate reliably at 2.7 V supply during cold-crank conditions?
Yes - AH3232Q-P-A is fully specified down to 2.7 V, with guaranteed operation including UVLO release at ≥2.2 V and stable switching performance across -40°C to +150°C. Its chopper-stabilized design maintains BOP/BRP accuracy even at minimum VDD, supporting cold-crank scenarios where battery voltage dips to 6.5 V (and downstream regulators may output near 2.7 V).
Is the NC pin (Pin 2) required to be connected for proper function?
No - Pin 2 is internally unconnected and may be left floating, tied to VDD, or tied to GND without affecting operation. Diodes Incorporated explicitly states this in the datasheet; no electrical or thermal benefit is gained from connecting it, and doing so introduces no risk to functionality or reliability.
How does the built-in thermal protection behave during sustained high-temperature operation?
AH3232Q-P-A shuts down when junction temperature reaches +190°C (TTP), reducing supply current to near-zero. It automatically restarts once TJ falls below +180°C (TTPR). This hysteresis prevents oscillation and protects against permanent damage during prolonged exposure to under-hood temperatures exceeding +150°C ambient - verified per AEC-Q100 Grade 0 test conditions.
AH3232Q-P-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-SIP
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Unipolar Switch
- Technology:
- Hall Effect
- Polarization:
- South Pole
- Sensing Range:
- 6mT Trip, 4mT Release
- Test Condition:
- 25°C
- Voltage - Supply:
- 2.7V ~ 27V
- Current - Supply (Max):
- 6.9mA
- 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
AH3232Q-P-A FAQ
1.How can I place an order for AH3232Q-P-A through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3232Q-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 AH3232Q-P-A reliable?
The price and inventory of AH3232Q-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 AH3232Q-P-A is usually 5 days.
3.What payment methods are accepted for AH3232Q-P-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3232Q-P-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3232Q-P-A?
AH3232Q-P-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3232Q-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 AH3232Q-P-A?
For technical support, including AH3232Q-P-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3232Q-P-A requirements.
6.How does Aetrix verify that AH3232Q-P-A is sourced from the original manufacturer or authorized distributors?
All AH3232Q-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 AH3232Q-P-A meets industry standards.
7.What is the process for return or replacement of AH3232Q-P-A?
All AH3232Q-P-A units undergo pre-shipment inspection (PSI). If there is an issue with AH3232Q-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 AH3232Q-P-A part is unused and in its original packaging.
Return procedure for AH3232Q-P-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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