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Diodes Incorporated AH3322-P-A
- Part No.:
- AH3322-P-A
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP, Formed Leads
- Datasheet:
-
AH3322-P-A.pdf
- Description:
- HALL UNIPOLAR SWITCH SIP-3 AMMO
- Quantity:
- Payment:
- Shipping:
Inventory:4,077
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Product details
Overview
AH3322-P-A from Diodes Incorporated is a high-voltage, high-sensitivity Hall-effect unipolar switch IC designed for proximity and position sensing in consumer home appliances and industrial equipment. It operates from 3.0V to 28V, features open-drain output with 60mA continuous current rating, BOP/BRP of 15–45G/5–35G (typical 30G/20G), and functions across –40°C to +125°C.
For engineers reviewing the AH3322-P-A datasheet, AH3322-P-A pinout, AH3322-P-A application, or AH3322-P-A equivalent, key selection criteria include magnetic sensitivity thresholds, supply voltage range compatibility, open-drain drive capability, thermal derating in SIP-3 package, and polarity-dependent activation relative to package marking side.
Technical Context
The AH3322-P-A uses chopper-stabilized architecture with dynamic offset cancellation to achieve minimal switch-point drift over temperature and supply voltage. Its internal bandgap regulator provides temperature-compensated biasing for analog circuitry, enabling stable operation across –40°C to +125°C ambient.
It integrates reverse-blocking diode and zener clamps on both VDD and OUTPUT pins for robustness against ESD (8kV HBM) and transient overvoltage. The unipolar switching behavior-activated by South pole only-is polarity-specific to package type: South pole must face the part marking side for SIP-3 (Ammo Pack) and SOT23 (Type S), but the non-marking side for SC59.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0V to 28V - supports wide-input industrial and appliance power rails without external regulation |
| Operating Temperature | –40°C to +125°C - qualified for harsh environments including motor control housings and HVAC systems |
| BOP / BRP (Typical) | 30G / 20G - enables reliable detection of weak magnetic fields from small or distant magnets |
| Output Type | Single open-drain - allows flexible pull-up to any logic rail up to 28V and wired-OR interfacing |
| Output Current Limit | 30–55mA - protects internal switch during short-circuit or heavy capacitive load conditions |
| VOUT_ON | 0.2V (typ) at 20mA - ensures low saturation voltage for minimal power loss and clean logic-low signaling |
| Startup Time | 10µs (typ) - guarantees fast system response after power-on, critical for real-time position feedback |
Pinout & Package
AH3322-P-A is supplied in SIP-3 (Ammo Pack) package - a 3-pin, straight-lead, surface-mount package with 2.54mm pitch, optimized for automated insertion and high-reliability mounting in white goods and industrial controls.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Power supply input - accepts 3.0V–28V; includes reverse-blocking diode and zener clamp for fault tolerance |
| 2 | GND | Ground reference - common return for internal circuits and output stage; requires low-impedance PCB connection |
| 3 | OUTPUT | Open-drain output - sinks current when activated (South pole present); requires external pull-up resistor (RL) for logic-level interface |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized architecture | Reduces thermal drift of BOP/BRP to ±10G over full temperature range, eliminating manual calibration |
| Zener clamps on VDD and OUTPUT | Withstands 32V transients on supply and 32V on output, enabling direct use in 24V industrial buses |
| High ESD immunity | 8kV HBM rating allows safe handling and assembly without special ESD controls in standard production lines |
| Reverse supply protection | –18V absolute maximum reverse voltage prevents damage from accidental polarity reversal during installation |
| RF noise immunity | Validated performance in noisy motor-drive and switching-power-supply environments without added filtering |
Applications
| Washing Machine Lid Detection | Dishwasher Door Position Sensing |
|---|---|
Use Scenario: Detect lid closure before spin cycle initiation to prevent user injury and water leakage. IC Role / Device Role / Timing Role: Unipolar Hall switch activated by magnet embedded in lid latch; outputs logic-low when South pole approaches marking side of SIP-3 package. Use Value: Eliminates mechanical microswitches prone to contact wear, enabling >100,000-cycle reliability and IPX4-rated sealed enclosure design. |
Use Scenario: Confirm door is fully closed and latched prior to heating element activation. IC Role / Device Role / Timing Role: Mounted on frame; responds to magnet on door panel with 30G operate point, ensuring consistent detection despite hinge misalignment or thermal expansion. Use Value: Prevents hazardous dry-firing of heater; leverages 28V tolerance to interface directly with 24V PLC I/O without level-shifting. |
| Industrial Flow Meter Turbine Monitoring | Office Equipment Paper Jam Detection |
Use Scenario: Monitor rotation of ferrous turbine blade passing near sensor in liquid flow path. IC Role / Device Role / Timing Role: Detects each blade passage via magnetic field modulation; 4µs response time supports >15kHz pulse rates at full scale. Use Value: Enables accurate volumetric flow calculation with no moving contacts; chopper stabilization maintains accuracy across –20°C to +85°C fluid temperature range. |
Use Scenario: Identify paper obstruction in feed path by detecting stalled roller magnet position. IC Role / Device Role / Timing Role: Mounted adjacent to gear train; triggered by South pole on rotating magnet; open-drain output interfaces directly to 3.3V MCU GPIO with 10kΩ pull-up. Use Value: Reduces false triggers from vibration due to 10G hysteresis; 10nF–100nF CIN capacitor suppresses motor-induced noise without external ferrites. |
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 | Lower supply range (2.5V–3.5V), BOP/BRP ~35G/25G, SOT-23 package only | Not suitable for 24V systems; limited to battery-powered or 3.3V logic domains | Select only for low-voltage portable devices where SIP-3 mounting is not required |
| Melexis US1881EUA-ABA-002-SP | Wider BOP range (20–70G), 3.5V–24V supply, same SIP-3 footprint but no reverse-voltage protection | Lacks –18V reverse blocking; requires external diode for polarity-insensitive installations | Prefer when higher magnetic threshold flexibility is needed and board space allows discrete protection |
Compared with AH3322-P-A, A3212 offers tighter sensitivity control but fails in 24V industrial settings, while US1881 trades reverse-protection for broader BOP tuning-making AH3322-P-A the optimal choice for cost-sensitive, high-reliability 24V appliance designs requiring zero-additional-protection integration.
Availability
AH3322-P-A is available at Aetrix Electronics and suitable for washing machine lid detection, dishwasher door sensing, industrial flow metering, and office equipment jam detection requiring stable component supply, long-lifecycle support, and RoHS-compliant manufacturing.
Supply support for AH3322-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, automotive, computing, and consumer markets.
AH3322-P-A belongs to the AH332X high-voltage Hall-effect switch family, engineered specifically for robust, maintenance-free position sensing in white goods and factory automation where wide supply range and field reliability are mandatory.
FAQ
What magnetic polarity activates the AH3322-P-A in SIP-3 (Ammo Pack) package?
The AH3322-P-A in SIP-3 (Ammo Pack) package is activated by the South pole applied to the part marking side. This polarity requirement is fixed per package type and confirmed in the datasheet's magnetic characteristics table and pin diagrams. Applying North pole or reversing orientation yields no output change.
Can AH3322-P-A operate directly from a 24V DC bus without external regulation?
Yes - AH3322-P-A supports 3.0V to 28V supply voltage and includes internal zener clamping and reverse-blocking diode. It is rated for continuous 24V operation and withstands 32V transients, making it suitable for direct connection to industrial 24V rails without regulators or TVS diodes.
What is the maximum allowable ambient temperature for continuous operation in SIP-3 (Ammo Pack) package?
The AH3322-P-A in SIP-3 (Ammo Pack) is rated for –40°C to +125°C ambient operation. At +125°C, its power dissipation is derated to 132mW per thermal curves in DS46151 Rev. 2–2, which remains sufficient for typical 20mA output loads with proper PCB copper area.
Does AH3322-P-A require an external bypass capacitor, and if so, what value is recommended?
Yes - a 10nF to 100nF ceramic capacitor (CIN) between VDD and GND is recommended per the Typical Applications Circuit. This stabilizes the internal bandgap regulator and improves RF noise immunity, especially in motor-driven or switching-power-supply environments where conducted noise is prevalent.
AH3322-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
AH3322-P-A FAQ
1.How can I place an order for AH3322-P-A through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3322-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 AH3322-P-A reliable?
The price and inventory of AH3322-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 AH3322-P-A is usually 5 days.
3.What payment methods are accepted for AH3322-P-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3322-P-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3322-P-A?
AH3322-P-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3322-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 AH3322-P-A?
For technical support, including AH3322-P-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3322-P-A requirements.
6.How does Aetrix verify that AH3322-P-A is sourced from the original manufacturer or authorized distributors?
All AH3322-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 AH3322-P-A meets industry standards.
7.What is the process for return or replacement of AH3322-P-A?
All AH3322-P-A units undergo pre-shipment inspection (PSI). If there is an issue with AH3322-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 AH3322-P-A part is unused and in its original packaging.
Return procedure for AH3322-P-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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