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STMicroelectronics AIS3624DQTR
- Part No.:
- AIS3624DQTR
- Manufacturer:
- STMicroelectronics
- Category:
- Accelerometers
- Package:
- 24-FQFN Exposed Pad
- Datasheet:
-
AIS3624DQTR.pdf
- Description:
- ACCEL 6-24G I2C/SPI 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:13,774
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Product details
Overview
AIS3624DQTR from STMicroelectronics is an AEC-Q100 qualified ultra-low-power 3-axis digital accelerometer for automotive non-safety systems, featuring ±6g/±12g/±24g dynamically selectable full scale, 16-bit output with 12-bit resolution, SPI/I²C dual-interface support, and embedded self-test - deployed in telematics boxes and impact logging systems.
For engineers reviewing the AIS3624DQTR datasheet, AIS3624DQTR pinout, AIS3624DQTR application, or AIS3624DQTR equivalent, key selection criteria include extended temperature operation (−40°C to +105°C), 10 μA ultra-low-power mode current, programmable inertial interrupts, sleep-to-wake capability, and QFN-24 package compatibility with automotive PCB layout constraints.
Technical Context
The AIS3624DQTR integrates a MEMS sensing element with a low-noise charge amplifier, 12-bit sigma-delta ADC, and digital signal processing logic supporting configurable high-pass filtering, self-test excitation control, and dual independent interrupt generators. Its architecture enables real-time motion detection with programmable thresholds and duration windows.
It operates in three power modes - normal (200–450 μA), low-power (8–12 μA at 1 Hz ODR), and power-down (0.1–2 μA) - with dynamic ODR scaling from 0.5 Hz to 1 kHz and factory-calibrated offset/sensitivity across temperature. The device uses shared pins (e.g., SCL/SPC, SDA/SDI/SDO) to minimize footprint while maintaining interface flexibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 2.4 V to 3.6 V - supports wide automotive battery range without external regulation |
| I/O voltage compatibility | 1.8 V - interoperable with low-voltage microcontrollers without level shifters |
| Ultra-low-power mode current | 10 μA typical - enables always-on motion wake-up in battery-constrained telematics |
| Full-scale ranges | ±6g / ±12g / ±24g - user-selectable via register bits to match application shock/vibration profile |
| Output resolution | 12-bit effective (16-bit data register) - provides 2.55–13.11 mg/digit sensitivity per FS setting |
| Operating temperature | −40°C to +105°C - qualified for under-hood and cabin-mounted automotive environments |
| Shock survivability | 10,000 g - withstands mechanical stress during crash events and manufacturing handling |
| Interface protocols | SPI (3- or 4-wire) and I²C - dual-mode serial interface reduces system design complexity |
Pinout & Package
Package: QFN-24, 4 mm × 4 mm × 1.8 mm, exposed pad, RoHS-compliant ECOPACK®. Pin 1 marked by top-side dot; bottom-view orientation required for layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 5, 14 | VDD / VDD_IO | Separate analog (VDD) and I/O (VDD_IO) supplies - decoupling critical for noise immunity and 1.8 V logic compatibility |
| 6, 8, 9, 10 | GND | Four dedicated ground terminals - reduce impedance and improve signal integrity for accelerometer analog core |
| 11 | SCL / SPC | Shared I²C clock / SPI clock - mode selected by CS pin state; requires pull-up for I²C operation |
| 12 | CS | SPI enable / I²C mode select (low = SPI, high = I²C) - determines interface protocol at power-up |
| 15 | SDO / SA0 | SPI data out / I²C address LSB - sets device I²C address (0x18 or 0x19) when in I²C mode |
| 16 | SDI / SDO / SDA | SPI input / 3-wire SDO / I²C bidirectional data - multiplexed function requiring careful bus arbitration |
| 3, 7 | INT_2 / INT_1 | Open-drain inertial interrupt outputs - drive external MCU GPIOs for wake-up on free-fall, motion, or position change |
| 4, 13 | Reserved | Internally connected to GND (pin 4) and VDD (pin 13) - must be externally tied as specified to ensure stability |
| 1–2, 17–24 | NC | No internal connection - leave unconnected; avoid routing traces to prevent parasitic coupling |
Key Features
| Feature | Design Value |
|---|---|
| Dynamically selectable full scale | ±6g/±12g/±24g via CTRL_REG4 - adapts measurement range to vehicle dynamics without hardware change |
| Programmable interrupt generators | Two independent engines with threshold, duration, and event-type (motion, free-fall, position) configuration - enables autonomous edge-triggered wake-up |
| System sleep-to-wake function | Enters ultra-low-power mode (10 μA) and wakes host MCU on inertial event - extends battery life in portable automotive loggers |
| Embedded self-test | Electrostatic actuation verifies MEMS element and signal chain integrity in-system - eliminates need for external test fixtures |
| Extended temperature range | −40°C to +105°C operation with calibrated performance - meets AEC-Q100 Grade 2 requirements for non-safety automotive use |
| High shock survivability | 10,000 g rating - ensures functional reliability after mechanical shock during assembly or vehicle collision |
Applications
| Telematics Data Logging | Impact Recognition System |
|---|---|
Use Scenario: Continuous acceleration monitoring in fleet management black boxes to record harsh braking, cornering, and collision events. IC Role / Device Role / Timing Role: Primary inertial sensor capturing 3-axis motion data at 100 Hz ODR with timestamp-aligned interrupt triggers. Use Value: 12-bit resolution and ±24g range capture high-magnitude crash transients; ultra-low-power mode enables 24/7 logging on backup battery. |
Use Scenario: Detecting and classifying vehicle impacts for insurance telematics or post-crash notification. IC Role / Device Role / Timing Role: Dual-interrupt generator flags impact onset (INT1) and duration (INT2) with programmable g-thresholds and debounce timing. Use Value: Self-test confirms sensor readiness before deployment; 10,000 g survivability ensures post-impact data validity. |
| Vibration Monitoring Unit | Smart Parking Sensor |
Use Scenario: Mounting on engine blocks or suspension components to monitor abnormal vibration patterns indicating wear or imbalance. IC Role / Device Role / Timing Role: High-resolution (±6g/12-bit) low-noise sensing with configurable high-pass filter to isolate mechanical resonance frequencies. Use Value: Factory-calibrated offset and temperature compensation (±0.4 mg/°C) maintain accuracy across under-hood thermal cycles. |
Use Scenario: Detecting vehicle entry/exit and tilt changes in automated parking guidance systems. IC Role / Device Role / Timing Role: Position-sensitive interrupt generation (e.g., Z-axis tilt >15°) combined with sleep-to-wake to minimize power draw between events. Use Value: 1.8 V I/O compatibility interfaces directly with low-power parking controller MCUs; QFN-24 footprint fits space-constrained enclosures. |
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 |
|---|---|---|---|
| ADXL362ACPZ-RL7 | Lower max operating temperature (−40°C to +85°C); no AEC-Q100 qualification; 2-μA standby current | Targeted at industrial/portable equipment, not automotive under-hood use | Select only for non-automotive designs where extended temperature is not required |
| KX126-1052 | Wider supply range (1.71–3.6 V); integrated FIFO (32×16-bit); higher ODR (up to 2.6 kHz) | Optimized for wearable and IoT motion sensing; lacks 10,000 g shock rating | Prefer for high-sample-rate applications with memory buffering needs, but not for crash-survivable automotive roles |
Compared with ADXL362ACPZ-RL7 and KX126-1052, the AIS3624DQTR uniquely combines AEC-Q100 qualification, 105°C operation, and 10,000 g survivability - making it the only suitable choice for automotive non-safety motion sensing where environmental ruggedness is mandatory.
Availability
AIS3624DQTR is available at Aetrix Electronics and suitable for telematics data logging, impact recognition systems, vibration monitoring units, and smart parking sensors requiring stable component supply across automotive production lifecycles.
Supply support for AIS3624DQTR 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 specializing in automotive, industrial, and power management solutions, with over 40 years of MEMS sensor innovation and AEC-Q100 product validation expertise.
The AIS3624DQTR belongs to ST's automotive-grade motion sensor portfolio, designed specifically for non-safety-critical vehicle functions including driver behavior analysis, predictive maintenance, and usage-based insurance systems.
FAQ
What is the difference between VDD and VDD_IO on the AIS3624DQTR?
VDD powers the internal analog sensor and signal chain (2.4–3.6 V), while VDD_IO supplies the digital I/O buffers (1.8 V to VDD+0.1 V). This separation allows direct interfacing with 1.8 V microcontrollers without level shifters, while maintaining optimal analog performance and noise immunity for the MEMS element.
How does the sleep-to-wake function operate in practice?
The AIS3624DQTR enters ultra-low-power mode (10 μA) with internal oscillator active, continuously monitoring acceleration on all axes. When configured interrupt conditions (e.g., X/Y/Z magnitude exceeding threshold for defined duration) occur, it asserts INT1 or INT2 to wake the host MCU - eliminating polling and reducing system-level power consumption.
Can the AIS3624DQTR be used in safety-critical automotive applications?
No. The AIS3624DQTR is AEC-Q100 qualified but explicitly intended for automotive non-safety applications per ST's documentation. It lacks ASIL certification, diagnostic coverage, and fault-tolerant architecture required for airbag control, ESC, or ADAS safety functions.
What is the purpose of the reserved pins (4 and 13) on the QFN-24 package?
Pin 4 is internally connected to GND and must be externally tied to ground; Pin 13 is internally connected to VDD and must be externally tied to the main supply. These connections stabilize internal bias networks and ensure reliable operation across temperature and voltage extremes - omission risks calibration drift or intermittent functionality.
AIS3624DQTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 24-FQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- Adjustable Bandwidth, Selectable Scale
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QFN (4x4)
AIS3624DQTR FAQ
1.How can I place an order for AIS3624DQTR through Aetrix?
Please submit a Request for Quotation (RFQ) for AIS3624DQTR 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 AIS3624DQTR reliable?
The price and inventory of AIS3624DQTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AIS3624DQTR is usually 5 days.
3.What payment methods are accepted for AIS3624DQTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AIS3624DQTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AIS3624DQTR?
AIS3624DQTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AIS3624DQTR 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 AIS3624DQTR?
For technical support, including AIS3624DQTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AIS3624DQTR requirements.
6.How does Aetrix verify that AIS3624DQTR is sourced from the original manufacturer or authorized distributors?
All AIS3624DQTR 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 AIS3624DQTR meets industry standards.
7.What is the process for return or replacement of AIS3624DQTR?
All AIS3624DQTR units undergo pre-shipment inspection (PSI). If there is an issue with AIS3624DQTR, 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 AIS3624DQTR part is unused and in its original packaging.
Return procedure for AIS3624DQTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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