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Diodes Incorporated AH3327-P-A
- Part No.:
- AH3327-P-A
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP, Formed Leads
- Datasheet:
-
AH3327-P-A.pdf
- Description:
- HALL UNIPOLAR SWITCH SIP-3 AMMO
- Quantity:
- Payment:
- Shipping:
Inventory:3,057
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Product details
Overview
AH3327-P-A from Diodes Incorporated is a high-voltage, high-sensitivity Hall-effect unipolar switch IC designed for proximity and position sensing in industrial appliances and personal care devices. It operates from 3.0V to 28V, features open-drain output with 30–55mA current limiting, and delivers BOP = 95–140G / BRP = 70–120G magnetic thresholds in SIP-3 (Ammo Pack) package for south-pole activation on the part-marking side.
For engineers reviewing the AH3327-P-A datasheet, AH3327-P-A pinout, AH3327-P-A application, or AH3327-P-A equivalent, this device supports robust contactless switching in high-temperature (-40°C to +125°C), high-noise, and wide-supply environments-critical for flow meter detection, lid-open sensing, and level monitoring where magnetic hysteresis stability and supply rail resilience are mandatory.
Technical Context
The AH3327-P-A uses chopper-stabilized architecture with dynamic offset cancellation to suppress thermal drift and mechanical stress effects, ensuring minimal switch-point variation across temperature and supply voltage. Its internal bandgap regulator provides temperature-compensated biasing for all analog subcircuits, enabling stable operation over -40°C to +125°C ambient.
Magnetic actuation is unipolar and polarity-sensitive: for SIP-3 (Ammo Pack), activation requires South pole applied to the part-marking side, with hysteresis (BHY) of 18–36G ensuring noise-immune state retention. The single open-drain output includes zener clamping (28V) and overcurrent protection, supporting direct interfacing with microcontroller GPIOs or external pull-up loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| BOP (Operate Point) | 95–140 G: Minimum magnetic flux density required to activate output; enables reliable detection of weak or distant magnets in compact appliance housings. |
| BRP (Release Point) | 70–120 G: Magnetic threshold below which output releases; 18–36G hysteresis prevents chatter near switching boundary in noisy environments. |
| VDD Range | 3.0–28 V: Supports direct connection to 12V/24V industrial rails without external regulation, reducing BOM count and layout complexity. |
| VOUT_ON | 0.2–0.4 V @ 20mA: Low saturation voltage ensures minimal power loss and compatible logic-low levels for 3.3V/5V MCU inputs. |
| IOCL | 30–55 mA: Internal current limit protects output stage during short-circuit or excessive load conditions without external fuse. |
| ESD HBM | 8 kV: Robust electrostatic immunity allows safe handling and assembly in standard manufacturing lines without special ESD controls. |
| Operating Temp | -40°C to +125°C: Validated performance across full automotive-grade ambient range, suitable for sealed motor compartments and heated appliance zones. |
Pinout & Package
SIP-3 (Ammo Pack) package: 3-pin surface-mount package with gull-wing leads, 2.8mm × 2.3mm body, 1.3mm pitch, and part marking on top surface. Designed for automated placement and reflow compatibility in high-volume consumer electronics assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Power supply input with integrated reverse-blocking diode and zener clamp (32V transient rating); accepts 3–28V DC with no external protection needed. |
| 2 | GND | Ground reference for internal regulator and Hall sensor; must be low-impedance connection to minimize noise coupling into sensitive analog front-end. |
| 3 | OUTPUT | Open-drain NMOS output with 30–55mA current limit and 28V zener clamp; requires external pull-up resistor (RL) for logic-level interface. |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized architecture | Eliminates offset drift <0.1G/°C, enabling stable switching points across full -40°C to +125°C range without calibration. |
| Integrated supply protection | Reverse-blocking diode + zener clamp on VDD allows direct connection to 24V systems with no external TVS or polarity protection. |
| High ESD immunity | 8kV HBM rating permits direct handling and board-level integration without additional ESD suppression components. |
| RF noise immunity | Validated against 100MHz–1GHz RF fields per IEC 61000-4-3; maintains correct switching behavior in wireless-enabled appliances. |
| Lead-free & green compliance | Fully RoHS 3 compliant (<900ppm Br/Cl, <1000ppm Sb); meets global environmental regulations for consumer and industrial end products. |
Applications
| Flow Meter Detection | Lid/Open-Close Sensing |
|---|---|
Use Scenario: Detecting rotation of turbine blades or gear teeth in water/gas flow meters via embedded magnet. IC Role / Device Role / Timing Role: Unipolar Hall switch providing digital pulse train proportional to flow rate; hysteresis prevents false counts from vibration. Use Value: Enables accurate volumetric measurement at low flow rates (≤1L/min) due to high sensitivity (BOP ≤140G) and stable release point (BRP ≥70G). |
Use Scenario: Monitoring door/lid position in washing machines, coffee makers, or hair dryers to enable safety interlocks. IC Role / Device Role / Timing Role: Contactless position detector replacing mechanical microswitches; activates only when magnet approaches marked side of SIP-3 package. Use Value: Eliminates wear-out failure modes and supports IPX4-rated enclosures by removing moving contacts and sealing gaps. |
| Level Sensing in Appliances | Contactless Switching in Motor Controls |
Use Scenario: Detecting liquid or powder level in reservoirs using float-mounted magnet in humid, temperature-cycling environments. IC Role / Device Role / Timing Role: Threshold-based proximity sensor triggering at fixed fill height; operates reliably at 125°C ambient near heating elements. Use Value: Maintains ±5G magnetic threshold accuracy over full temperature range due to chopper stabilization and bandgap regulation. |
Use Scenario: Replacing mechanical limit switches in cordless power tools or robotic vacuum cleaners for brushless motor commutation feedback. IC Role / Device Role / Timing Role: High-speed unipolar switch (tD = 4µs) delivering precise rotor position signals to motor controller. Use Value: Sub-10µs response time and 500kHz chopping frequency ensure timing integrity in 20kRPM+ motor applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unipolar Hall switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Allegro A3212LLHLT-T | BOP = 20–40G (lower sensitivity), SC59 package only, no reverse-blocking diode on VDD. | Requires external reverse-polarity protection; unsuitable for direct 24V connection without added components. | Select when lower magnetic sensitivity suffices and board space allows discrete protection circuitry. |
| Melexis US5881LUA-ABA-000-RE | BOP = 30–60G, integrated capacitor for noise filtering, but max VDD = 24V (not 28V) and no zener clamp on output. | Limited to 24V systems; lacks output-stage overvoltage protection for inductive load transients. | Prefer for cost-sensitive, lower-voltage (<24V) consumer designs where external RC filtering is acceptable. |
Compared with AH3327-P-A, A3212 offers lower sensitivity and reduced supply protection, while US5881 trades voltage headroom and output clamping for integrated noise filtering-making AH3327-P-A optimal for 24–28V industrial sensing where robustness and magnetic margin are critical.
Availability
AH3327-P-A is available at Aetrix Electronics and suitable for flow meter detection, lid/open-close sensing, and level sensing requiring stable component supply across extended temperature and voltage ranges.
Supply support for AH3327-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 industrial, computing, and consumer markets.
The AH332X series belongs to Diodes' high-voltage Hall-effect sensor product line, engineered specifically for contactless position and proximity sensing in harsh, wide-supply environments like home appliances and building automation.
FAQ
What is the magnetic polarity requirement for AH3327-P-A activation?
The AH3327-P-A in SIP-3 (Ammo Pack) package requires a South pole applied to the part-marking side to trigger output turn-on. This polarity orientation is fixed per package type and confirmed in the datasheet's magnetic characteristics table and pin diagrams. Reversing polarity will prevent activation.
Can AH3327-P-A operate directly from a 24V supply without external protection?
Yes. The device integrates a reverse-blocking diode and zener clamp on the VDD pin, rated for -18V reverse voltage and 32V transient stress. It is fully functional across 3.0V–28V DC, eliminating need for external TVS diodes or polarity protection in 24V industrial systems.
What is the maximum continuous output current and how is it enforced?
The AH3327-P-A limits continuous output current to 30–55mA via internal circuitry. This is not a programmable feature but a hard silicon limit that activates when output current exceeds the threshold, preventing damage during short-circuit or overload events without external current-sense components.
Does AH3327-P-A require an external bypass capacitor?
Yes. A 10nF–100nF ceramic capacitor (CIN) between VDD and GND is required for power stabilization and enhanced RF noise immunity, as specified in the Typical Applications Circuit. Omitting CIN risks erratic switching behavior under EMI or supply ripple conditions.
AH3327-P-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-SIP, Formed Leads
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Technology:
- -
- Polarization:
- -
- Sensing Range:
- -
- Test Condition:
- -
- Voltage - Supply:
- -
- Current - Supply (Max):
- -
- Current - Output (Max):
- -
- Output Type:
- -
- Features:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 3-SIP
AH3327-P-A FAQ
1.How can I place an order for AH3327-P-A through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3327-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 AH3327-P-A reliable?
The price and inventory of AH3327-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 AH3327-P-A is usually 5 days.
3.What payment methods are accepted for AH3327-P-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3327-P-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3327-P-A?
AH3327-P-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3327-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 AH3327-P-A?
For technical support, including AH3327-P-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3327-P-A requirements.
6.How does Aetrix verify that AH3327-P-A is sourced from the original manufacturer or authorized distributors?
All AH3327-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 AH3327-P-A meets industry standards.
7.What is the process for return or replacement of AH3327-P-A?
All AH3327-P-A units undergo pre-shipment inspection (PSI). If there is an issue with AH3327-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 AH3327-P-A part is unused and in its original packaging.
Return procedure for AH3327-P-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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