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Diodes Incorporated AH3323-SA-7
- Part No.:
- AH3323-SA-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
AH3323-SA-7.pdf
- Description:
- HALL UNIPOLAR SWITCH SSOT23 T&R
- Quantity:
- Payment:
- Shipping:
Inventory:1,289
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Product details
Overview
AH3323-SA-7 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 30–55mA current limiting, and delivers BOP/BRP of 38–72G/20–50G (typical) for reliable magnetic actuation. Its chopper-stabilized architecture ensures stable switching across –40°C to +125°C.
For engineers reviewing the AH3323-SA-7 datasheet, AH3323-SA-7 pinout, AH3323-SA-7 application, or AH3323-SA-7 equivalent, key selection criteria include magnetic sensitivity thresholds, supply voltage range compatibility, open-drain load drive capability, thermal derating in SOT23 (Type S), and polarity-dependent mounting orientation for South-pole activation.
Technical Context
The AH3323-SA-7 implements a chopper-stabilized Hall sensor with dynamic offset cancellation, delivering <10µs typical response time and 500kHz internal chopping frequency for superior temperature stability and minimal switch-point drift. Its internal bandgap regulator supplies temperature-compensated bias to all subcircuits.
It integrates reverse-blocking diode protection, zener clamps on both VDD and OUTPUT pins, and overcurrent-limited output stage. Magnetic actuation requires South pole applied to the part-marking side for SOT23 (Type S) package, with hysteresis of 14–26G ensuring noise-immune state retention.
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. |
| BOP / BRP (Typ.) | 55G / 35G - enables reliable actuation with low-strength magnets at room temperature. |
| Hysteresis (BHY) | 20G (typ.) - prevents chatter near threshold under noisy or fluctuating field conditions. |
| Output Type | Open-drain, rated 60mA continuous - compatible with standard pull-up resistors and logic interfaces. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood, motor control, and high-ambient industrial environments. |
| ESD Rating (HBM) | 8kV - provides robust handling during assembly and end-equipment operation. |
| Startup Time | 10µs (typ.) - ensures rapid system readiness after power-on, critical for real-time sensing loops. |
Pinout & Package
SOT23 (Type S) package: 3-pin surface-mount, 2.9mm × 2.4mm footprint, 1.0mm max height, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Power supply input - accepts 3.0V–28V; includes reverse-blocking diode and zener clamp. |
| 2 | GND | Ground reference - common return for internal regulator, sensor, and output stage. |
| 3 | OUTPUT | Open-drain output - sinks up to 60mA; requires external pull-up; clamped to 28V max. |
Key Features
| Feature | Design Value |
|---|---|
| Chopper stabilization | Enables ±0.5G/°C typical BOP drift - maintains accuracy across full temperature range without calibration. |
| South-pole activation (marking side) | Eliminates need for magnet polarity sorting in SOT23 (Type S) assembly - simplifies mechanical design and BOM. |
| Zener clamps on VDD & OUTPUT | Withstands transient overvoltage up to 32V on VDD and 32V on OUTPUT - protects against inductive kickback and ESD events. |
| Internal bandgap regulator | Stabilizes internal circuit bias independently of VDD variation - ensures consistent switching thresholds from 3V to 28V. |
| RF noise immunity | Validated per IEC 61000-4-3 - suppresses false triggering in motor-driven or wireless-enabled appliances. |
Applications
| Washing Machine Lid Detection | Industrial Conveyor Position Sensing |
|---|---|
Use Scenario: Detect lid closure in top-load washing machines using a magnet embedded in the lid and sensor mounted on the chassis. IC Role / Device Role / Timing Role: Unipolar Hall switch providing digital ON/OFF signal when South pole approaches marking side of SOT23 package. Use Value: Enables fail-safe interlock that disables drum rotation unless lid is fully closed - meets IEC 60335 safety requirements. |
Use Scenario: Monitor presence/absence of metal carriers on high-speed conveyor belts in packaging lines. IC Role / Device Role / Timing Role: Proximity sensor detecting ferrous targets passing within 3–5mm; output drives PLC input via pull-up resistor. Use Value: Delivers 4µs response time and 20G hysteresis to reject vibration-induced noise while maintaining >10kHz detection rate. |
| Smart Thermostat Air Filter Monitoring | Power Tool Motor Commutation Feedback |
Use Scenario: Track air filter replacement interval by counting airflow-induced vane rotations in HVAC ducts. IC Role / Device Role / Timing Role: Edge-triggered position detector capturing vane passage; output pulses fed to microcontroller counter. Use Value: Operates reliably at 3.3V or 12V system rails and withstands ambient temperatures up to +125°C near heat exchangers. |
Use Scenario: Provide rotor position feedback for BLDC motor commutation in cordless drills and angle grinders. IC Role / Device Role / Timing Role: Unipolar switch synchronized to magnet poles on rotating shaft; triggers gate driver timing logic. Use Value: 10µs startup time and 500kHz chopping frequency prevent timing skew during rapid acceleration/deceleration cycles. |
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 = 25G/15G (lower sensitivity); SOIC-8 package; no integrated zener clamp on output. | Requires external TVS for output protection; less suitable for high-noise motor environments. | Select if lower magnetic sensitivity suffices and SOIC-8 PCB layout is preferred over SOT23. |
| MELEXIS US1881EUA-ABA-000-SP | BOP/BRP = 35G/20G; same SOT23-3 package; lacks reverse-blocking diode on VDD. | Needs external reverse-polarity protection; narrower 4.5–24V supply range limits 28V industrial use. | Choose when cost sensitivity outweighs need for 28V operation and integrated reverse protection. |
Compared with A3212LLHLT-T and US1881EUA-ABA-000-SP, the AH3323-SA-7 offers higher magnetic sensitivity, wider 3–28V operation, integrated reverse-blocking diode, and dual zener clamps - making it optimal for ruggedized, high-voltage, noise-prone industrial and appliance designs where reliability and simplified BOM are critical.
Availability
AH3323-SA-7 is available at Aetrix Electronics and suitable for washing machine safety interlocks, industrial conveyor position monitoring, smart HVAC filter tracking, and power tool motor commutation requiring stable component supply across automotive-qualified temperature ranges and high-noise environments.
Supply support for AH3323-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, industry-qualified components for power management, signal integrity, and sensing applications.
The AH332X series belongs to Diodes' Hall-effect sensor product line, engineered specifically for robust, low-maintenance proximity and position sensing in harsh ambient conditions - targeting home appliance, industrial automation, and motor control markets.
FAQ
What is the correct magnet orientation for AH3323-SA-7 activation?
The AH3323-SA-7 uses SOT23 (Type S) packaging and requires a South pole applied to the part-marking side for activation. This is explicitly defined in the datasheet's magnetic characteristics table and pin diagrams. Applying North pole or reversing orientation results in no output switching. Mounting must align the magnet perpendicular to the package surface for optimal flux coupling.
Does AH3323-SA-7 require an external capacitor on VDD?
Yes - a 10nF to 100nF ceramic decoupling capacitor (CIN) is recommended between VDD and GND per the Typical Applications Circuit. This stabilizes the internal bandgap regulator, improves noise immunity, and ensures reliable startup within the 10µs specification. Omission may cause erratic switching or delayed power-on response under noisy supply conditions.
Can AH3323-SA-7 drive an LED directly?
No - the open-drain output is rated for 60mA continuous sink current but lacks internal current regulation. Driving an LED directly risks exceeding absolute maximum ratings if forward voltage and series resistance are not precisely calculated. Use an external current-limiting resistor or interface via a transistor buffer for safe LED indication.
Is AH3323-SA-7 qualified for automotive applications?
No - AH3323-SA-7 is not AEC-Q200 qualified. The automotive-grade variant is the AH332XQ series, documented separately. While AH3323-SA-7 operates from –40°C to +125°C and includes robust protections, it lacks automotive-specific qualification testing (e.g., HTOL, temperature cycling, board-level vibration). Use AH332XQ for under-hood or safety-critical vehicle systems.
AH3323-SA-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- 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:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
AH3323-SA-7 FAQ
1.How can I place an order for AH3323-SA-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3323-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 AH3323-SA-7 reliable?
The price and inventory of AH3323-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 AH3323-SA-7 is usually 5 days.
3.What payment methods are accepted for AH3323-SA-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3323-SA-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3323-SA-7?
AH3323-SA-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3323-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 AH3323-SA-7?
For technical support, including AH3323-SA-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3323-SA-7 requirements.
6.How does Aetrix verify that AH3323-SA-7 is sourced from the original manufacturer or authorized distributors?
All AH3323-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 AH3323-SA-7 meets industry standards.
7.What is the process for return or replacement of AH3323-SA-7?
All AH3323-SA-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH3323-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 AH3323-SA-7 part is unused and in its original packaging.
Return procedure for AH3323-SA-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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