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Diodes Incorporated AH3323A-SA-7
- Part No.:
- AH3323A-SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AH3323A-SA-7.pdf
- Description:
- HALL UNIPOLAR SWITCH SSOT23 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:2,929
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Product details
Overview
AH3323A-SA-7 from Diodes Incorporated is a high-voltage, ultra-high-sensitivity Hall-effect unipolar switch IC with internal pullup resistor, designed for proximity and position sensing in industrial and consumer appliances. It operates from 3.0V to 28V, features BOP/BRP of +55G/+35G typical, -40°C to +125°C temperature range, and open-drain output with overcurrent limit - used in contactless switches and flow meters.
For engineers reviewing the AH3323A-SA-7 datasheet, AH3323A-SA-7 pinout, AH3323A-SA-7 application, or AH3323A-SA-7 equivalent, key selection criteria include magnetic operate/release points, supply voltage tolerance, internal pullup resistance value, output current limit, and SOT23 (Type S) package compatibility with PCB layout constraints.
Technical Context
The AH3323A employs chopper-stabilized architecture with dynamic offset cancellation to minimize thermal drift and stress-induced switching point variation. Its internal bandgap regulator supplies temperature-compensated bias to analog blocks, ensuring 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 supply transients and ESD. The open-drain output switches low when South pole flux exceeds BOP (+55G typ), remains latched until flux drops below BRP (+35G typ), and includes 30–55mA current limiting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0V to 28V - supports wide-input industrial power rails without external regulation |
| Operate Point (BOP) | +55G typical - enables reliable detection with weak or distant magnets |
| Release Point (BRP) | +35G typical - provides 20G hysteresis to prevent chatter near threshold |
| Output Type | Open-drain with internal 10–18kΩ pullup - eliminates need for external resistor in most applications |
| Output Current Limit | 30–55mA - protects internal switch and external load during fault conditions |
| Startup Time | 10µs typical - ensures fast system response after power-on |
| ESD Rating | HBM ±8kV - withstands handling and board-level electrostatic events |
Pinout & Package
Package: SOT23 (Type S), 3-pin surface-mount, 2.9mm × 2.4mm footprint, matte tin-plated leads, moisture sensitivity level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VDD) | Power Supply Input | Accepts 3.0–28V DC; includes reverse-blocking diode and 28V Zener clamp |
| 2 (GND) | Ground Reference | Common return path for internal circuits and output load current |
| 3 (OUTPUT) | Open-Drain Output | Switches low when B > BOP; includes 30–55mA current limit and 28V Zener clamp |
Key Features
| Feature | Design Value |
|---|---|
| Chopper stabilization | Reduces thermal drift of BOP/BRP to <±0.5G/°C and enables stable operation at 125°C |
| Internal pullup resistor | 14kΩ typical - simplifies interface to microcontroller GPIO or logic inputs |
| High-voltage tolerance | 32V absolute max VDD - accommodates 24V industrial transients without external protection |
| Magnetic polarity sensitivity | South-pole activation only - prevents false triggers from stray North-field interference |
| RF noise immunity | Validated per IEC 61000-4-3 - maintains switching integrity in noisy motor-drive environments |
Applications
| Industrial Proximity Sensing | Home Appliance Lid Detection |
|---|---|
Use Scenario: Detect presence of metal components on conveyor lines or robotic end-effectors. IC Role / Device Role / Timing Role: Unipolar Hall switch providing digital position feedback to PLC or motion controller. Use Value: 55G operate point enables detection through 2mm stainless steel housing; 28V operation matches factory 24VDC control rail. | Use Scenario: Confirm closed state of washing machine or dishwasher door before cycle start. IC Role / Device Role / Timing Role: Contactless safety interlock switch interfacing directly with appliance MCU. Use Value: Internal pullup eliminates external resistor; -40°C to +125°C rating covers condensation and heating cycles. |
| Flow Meter Rotor Position | Contactless Toggle Switch |
Use Scenario: Sense rotation of magnet-embedded impeller blades in water/gas metering systems. IC Role / Device Role / Timing Role: Pulse-generating Hall sensor feeding frequency-to-flow calculation in meter SoC. Use Value: 4µs response time supports >25kHz pulse rates; 10µs startup ensures immediate readiness after power-up. | Use Scenario: Replace mechanical pushbutton in handheld personal care devices (e.g., electric toothbrush, shaver). IC Role / Device Role / Timing Role: Low-power, wear-free actuation interface for battery-operated products. Use Value: 3mA typical supply current extends battery life; 8kV HBM ESD withstands user-handling discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect unipolar switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ALLEGRO A3212LLHLT-T | BOP/BRP = +35G/+25G; no internal pullup; 2.5–24V supply | Requires external pullup; lower sensitivity limits use with small or distant magnets | Select if lower cost and reduced sensitivity suffice, and external resistor placement is acceptable |
| MELEXIS US1881EUA-ABA-000-REEL | BOP/BRP = +30G/+15G; 3.5–24V supply; 50mA output limit | Narrower hysteresis increases susceptibility to magnetic noise; lacks Zener clamp on output | Choose for cost-sensitive consumer designs where full 28V operation and robust clamping are not required |
Compared with A3212LLHLT-T and US1881EUA-ABA-000-REEL, the AH3323A-SA-7 delivers higher magnetic sensitivity, wider supply range, integrated pullup, and dual Zener clamping - making it optimal for industrial-grade reliability where field strength varies or supply transients occur.
Availability
AH3323A-SA-7 is available at Aetrix Electronics and suitable for industrial automation, home appliance control, and personal care device design requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for AH3323A-SA-7 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, with manufacturing certified to IATF 16949 and quality systems aligned to AEC-Q standards.
The AH3323A belongs to Diodes' high-voltage Hall-effect switch product line, engineered for robust, maintenance-free position sensing in harsh environments including motor controls, white goods, and industrial equipment.
FAQ
What magnetic polarity activates the AH3323A-SA-7?
The AH3323A-SA-7 is activated exclusively by the South pole applied to the marked side of the SOT23 package. The part marking "S2M" indicates the active surface; North pole exposure produces no output change. This unipolar behavior is confirmed in the magnetic characteristics table (BOPS/BRPS) and functional block diagram.
Does the AH3323A-SA-7 require an external pullup resistor?
No - the AH3323A-SA-7 integrates a 10–18kΩ pullup resistor on the open-drain OUTPUT pin. This eliminates the need for external components in standard interfacing to 3.3V or 5V microcontrollers. External pullups are unnecessary unless specific timing or voltage-level requirements demand customization.
Can the AH3323A-SA-7 operate reliably at 28V continuously?
Yes - 28V is within the recommended continuous operating range (3.0V to 28V). The 32V absolute maximum rating applies only to transient stress; sustained operation at 28V is fully characterized and supported across -40°C to +125°C, as verified in the Recommended Operating Conditions table and thermal derating curves.
How does the chopper stabilization improve performance over basic Hall switches?
Chopper stabilization in the AH3323A cancels offset voltage drift caused by temperature gradients and mechanical stress, reducing BOP/BRP shift to <±0.5G/°C. It also suppresses 1/f noise, enabling stable switching at low field strengths and improving immunity to vibration-induced signal artifacts in industrial mounting scenarios.
AH3323A-SA-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Unipolar Switch
- Technology:
- Hall Effect
- Polarization:
- South Pole
- Sensing Range:
- 7mT Trip, 2mT Release
- Test Condition:
- -40°C ~ 125°C
- Voltage - Supply:
- 3V ~ 28V
- Current - Supply (Max):
- 5mA
- Current - Output (Max):
- 55mA
- Output Type:
- Open Drain
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23 (Type S)
AH3323A-SA-7 FAQ
1.How can I place an order for AH3323A-SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3323A-SA-7 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 AH3323A-SA-7 reliable?
The price and inventory of AH3323A-SA-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH3323A-SA-7 is usually 5 days.
3.What payment methods are accepted for AH3323A-SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3323A-SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3323A-SA-7?
AH3323A-SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3323A-SA-7 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 AH3323A-SA-7?
For technical support, including AH3323A-SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3323A-SA-7 requirements.
6.How does Aetrix verify that AH3323A-SA-7 is sourced from the original manufacturer or authorized distributors?
All AH3323A-SA-7 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 AH3323A-SA-7 meets industry standards.
7.What is the process for return or replacement of AH3323A-SA-7?
All AH3323A-SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH3323A-SA-7, 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 AH3323A-SA-7 part is unused and in its original packaging.
Return procedure for AH3323A-SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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