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STMicroelectronics AIS3624DQ
- Part No.:
- AIS3624DQ
- Manufacturer:
- STMicroelectronics
- Category:
- Accelerometers
- Package:
- 24-FQFN Exposed Pad
- Datasheet:
-
AIS3624DQ.pdf
- Description:
- ACCEL 6-24G I2C/SPI 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,552
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Product details
Overview
AIS3624DQ from STMicroelectronics is an ultra-low-power, AEC-Q100-qualified 3-axis digital accelerometer for automotive non-safety systems. It delivers ±6g/±12g/±24g dynamically selectable full-scale ranges, 16-bit output with 12-bit effective resolution, and dual programmable interrupt generators. Used in telematics boxes and impact logging systems, it operates from -40°C to +105°C with 10 μA low-power mode current.
For engineers reviewing the AIS3624DQ datasheet, AIS3624DQ pinout, AIS3624DQ application, or AIS3624DQ equivalent, key selection criteria include its AEC-Q100 qualification, SPI/I²C dual-interface support, sleep-to-wake capability, 24-pin QFN package, and programmable inertial interrupt thresholds for motion-triggered event detection.
Technical Context
The AIS3624DQ integrates a MEMS sensing element with signal-conditioning analog front-end, 12-bit ADC, and digital control logic supporting both SPI (4-wire/3-wire) and I²C interfaces. Its register-mapped architecture enables real-time configuration of output data rate (0.5 Hz–1 kHz), high-pass filter cutoff, self-test activation, and interrupt trigger conditions.
Two independent interrupt generators (INT1, INT2) support configurable wake-up events-including free-fall, inertial wakeup, and position-based triggers-with user-defined thresholds and duration windows. The embedded self-test function validates sensor functionality by electrostatically actuating the proof mass and measuring output deviation in LSBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.4 V to 3.6 V - supports direct connection to automotive 3.3 V rails without LDO |
| I/O Voltage Compatibility | 1.8 V - enables interfacing with low-voltage microcontrollers without level shifters |
| Low-Power Mode Current | 10 μA - enables battery-operated telematics units with multi-year runtime |
| Full-Scale Range | ±6g / ±12g / ±24g - software-selectable to match application shock/vibration profile |
| Output Resolution | 12-bit effective (16-bit word) - provides 2.55–13.11 mg/digit sensitivity per FS setting |
| Operating Temperature | -40°C to +105°C - meets extended automotive ambient requirements |
| Shock Survivability | 10,000 g - ensures robustness during manufacturing handling and vehicle crash events |
Pinout & Package
The AIS3624DQ is housed in a 4 mm × 4 mm × 1.8 mm QFN-24 package with exposed thermal pad. Pin 1 is located at bottom-left corner (marked via laser etch or mold index); pins are numbered counter-clockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 5, 14 | VDD / VDD_IO | Separate analog (VDD) and I/O (VDD_IO) supplies allow independent power domain control and noise isolation |
| 6, 8, 9, 10 | GND | Four dedicated ground pins minimize impedance and improve noise immunity for analog and digital sections |
| 11 | SCL / SPC | Shared clock line: I²C SCL or SPI serial port clock - mode selected by CS pin state |
| 12 | CS | Mode select: low = SPI enabled; high = I²C enabled - no external pull-up/pull-down required |
| 15 | SDO / SA0 | Configurable: SPI data output or I²C device address LSB - enables dual-device addressing on same bus |
| 16 | SDI / SDA | Configurable: SPI data input or I²C bidirectional data - supports 3-wire SPI via shared SDI/SDO |
| 3, 7 | INT_2 / INT_1 | Dedicated open-drain interrupt outputs - drive external MCU GPIOs for low-latency event notification |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Full-Scale Selection | Runtime reconfiguration of ±6g/±12g/±24g range via CTRL_REG4 bits FS1–FS0 - adapts sensitivity to varying acceleration profiles |
| Programmable Interrupt Generators | Two independent engines with threshold, duration, and axis masking registers (INT1_CFG/INT2_CFG) - enables custom motion-event detection logic |
| Sleep-to-Wake Function | Automatic transition from <10 μA low-power mode to active measurement upon inertial event - reduces system-level power budget |
| Embedded Self-Test | Electrostatic actuation verified by LSB deviation (e.g., +510 LSb on Z-axis at ±6g) - confirms MEMS integrity without mechanical stimulus |
| AEC-Q100 Qualified | Grade 2 (-40°C to +105°C) qualification - validates reliability for automotive non-safety applications including telematics and diagnostics |
Applications
| Telematics Box Motion Activation | Impact Recognition & Logging |
|---|---|
Use Scenario: Detecting vehicle ignition-off movement to trigger GPS location upload and battery-saving deep-sleep entry. IC Role / Device Role / Timing Role: Accelerometer providing low-latency inertial wake-up signal to host MCU via INT1 pin. Use Value: 10 μA low-power mode extends battery life; programmable interrupt duration prevents false triggers from road vibration. | Use Scenario: Capturing crash-induced acceleration spikes for post-incident analysis in fleet management systems. IC Role / Device Role / Timing Role: High-shock survivable sensor capturing >100 g transients with 1 kHz ODR and 12-bit resolution. Use Value: ±24g full-scale setting avoids saturation; embedded self-test validates readiness before deployment. |
| Vibration Monitoring & Compensation | Automotive Position Sensing |
Use Scenario: Measuring chassis resonance frequencies to adjust adaptive suspension damping algorithms. IC Role / Device Role / Timing Role: Precision 3-axis motion sensor feeding real-time acceleration data to ECU over I²C interface. Use Value: 12-bit resolution and factory-calibrated offset (<±500 mg) ensure repeatable amplitude measurement across temperature. | Use Scenario: Determining vehicle orientation (e.g., parked uphill/downhill) for automatic parking brake engagement logic. IC Role / Device Role / Timing Role: Static tilt sensor using zero-g level accuracy and high-pass filter to reject dynamic noise. Use Value: TCOff ≤ ±0.4 mg/°C (X/Y) enables stable angle estimation over full automotive temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-axis automotive accelerometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADXL362 | 3.3 V only supply; 2.5 μA ultralow-power mode; no AEC-Q100 qualification | Targeted at industrial IoT, not automotive environments | Select when extreme low power dominates over automotive qualification |
| KX126-1026 | 1.71–3.6 V supply; 0.9 μA standby; AEC-Q100 Grade 2; smaller 2×2 mm QFN-12 | Limited to ±2g/±4g/±8g full scale - insufficient for impact logging | Select for space-constrained telematics where lower g-range suffices |
Compared with ADXL362 and KX126-1026, the AIS3624DQ uniquely balances AEC-Q100 compliance, ±24g range, and dual-interrupt flexibility-making it optimal for automotive impact detection and motion-activated functions requiring robustness and configurability.
Availability
AIS3624DQ is available at Aetrix Electronics and suitable for telematics box design, impact recognition systems, vibration monitoring subsystems, and automotive position sensing applications requiring stable component supply across extended temperature and automotive lifecycle demands.
Supply support for AIS3624DQ 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, sensors, power ICs, and automotive-grade components since 1987.
The AIS3624DQ belongs to ST's automotive-qualified MEMS accelerometer product line, engineered specifically for non-safety automotive applications demanding extended temperature operation, shock resilience, and low-power motion awareness.
FAQ
What communication protocols does the AIS3624DQ support?
The AIS3624DQ supports both SPI (4-wire and 3-wire modes) and I²C interfaces on shared pins. Mode selection is controlled by the CS pin: low enables SPI, high enables I²C. SDO/SA0 serves as either SPI data output or I²C address bit, while SDI/SDA handles bidirectional I²C or SPI input/output. No external hardware changes are needed to switch protocols.
How is the AIS3624DQ qualified for automotive use?
The AIS3624DQ is fully AEC-Q100 qualified to Grade 2 (-40°C to +105°C), with testing covering accelerated environmental stress, ESD, latch-up, and reliability validation. It features 10,000 g shock survivability, ECOPACK® RoHS/Green compliance, and extended temperature operation - all verified per AEC-Q100 Rev H requirements for non-safety automotive applications.
Can the AIS3624DQ generate interrupts for specific motion events?
Yes - it includes two independent, fully programmable interrupt generators (INT1 and INT2). Each supports inertial wakeup, free-fall detection, and position-based triggers with user-configurable thresholds, duration windows, and axis masking. Interrupt sources are reported in INT1_SRC/INT2_SRC registers, and output signals drive open-drain pins for direct MCU GPIO connection.
What is the purpose of the separate VDD and VDD_IO supplies?
VDD powers the internal analog circuitry and MEMS interface, while VDD_IO supplies the digital I/O buffers. This separation allows independent voltage scaling: VDD can be set to 3.3 V for optimal analog performance, while VDD_IO may operate at 1.8 V to interface directly with low-voltage MCUs - eliminating level shifters and reducing system BOM cost and board area.
AIS3624DQ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 24-FQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Obsolete
- Type:
- Digital
- Axis:
- X, Y, Z
- Acceleration Range:
- ±6g, 12g, 24g
- Sensitivity (LSB/g):
- 344 (±6g) ~ 85 (±24g)
- Sensitivity (mV/g):
- -
- Bandwidth:
- 25Hz ~ 500Hz
- Output Type:
- I2C, SPI
- Voltage - Supply:
- 2.4V ~ 3.6V
- Features:
- Selectable Scale
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QFN (4x4)
AIS3624DQ FAQ
1.How can I place an order for AIS3624DQ through Aetrix?
Please submit a Request for Quotation (RFQ) for AIS3624DQ 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 AIS3624DQ reliable?
The price and inventory of AIS3624DQ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AIS3624DQ is usually 5 days.
3.What payment methods are accepted for AIS3624DQ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AIS3624DQ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AIS3624DQ?
AIS3624DQ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AIS3624DQ 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 AIS3624DQ?
For technical support, including AIS3624DQ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AIS3624DQ requirements.
6.How does Aetrix verify that AIS3624DQ is sourced from the original manufacturer or authorized distributors?
All AIS3624DQ 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 AIS3624DQ meets industry standards.
7.What is the process for return or replacement of AIS3624DQ?
All AIS3624DQ units undergo pre-shipment inspection (PSI). If there is an issue with AIS3624DQ, 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 AIS3624DQ part is unused and in its original packaging.
Return procedure for AIS3624DQ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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