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STMicroelectronics LIS331DLMTR
- Part No.:
- LIS331DLMTR
- Manufacturer:
- STMicroelectronics
- Category:
- Accelerometers
- Package:
- 16-VFLGA
- Datasheet:
-
LIS331DLMTR.pdf
- Description:
- ACCELEROMETER 2-8G I2C/SPI 16LGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,602
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Product details
Overview
LIS331DLMTR from STMicroelectronics is a 3-axis digital accelerometer with I²C/SPI interface, ±2g/±4g/±8g selectable full-scale range, 16-bit data resolution, and embedded FIFO for motion sensing in compact portable devices. It operates from 2.16 V to 3.6 V, consumes 350 µA in active mode, and features programmable interrupt generators for free-fall, wake-up, and click detection - deployed in smartphone orientation control and wearable activity tracking.
For engineers reviewing the LIS331DLMTR datasheet, LIS331DLMTR pinout, LIS331DLMTR application, or LIS331DLMTR equivalent, key selection criteria include its low-power 3-axis sensing capability, configurable ODR (up to 1 kHz), self-test function, and industrial-grade temperature range (–40 °C to +85 °C) for reliable integration into battery-powered edge nodes.
Technical Context
The LIS331DLMTR integrates a MEMS sensing element with a signal-conditioning analog front-end and a 16-bit ADC, delivering digitized acceleration data via I²C (up to 400 kHz) or SPI (up to 10 MHz). Its internal architecture supports two independent interrupt generators with latchable or pulsed output modes.
It implements a 32-level FIFO buffer with watermark and overrun detection, enabling burst-mode data acquisition without host intervention. The device supports both high-pass filtered (HPF) and low-pass filtered (LPF) output paths for motion artifact suppression and vibration analysis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.16 V to 3.6 V - compatible with single-cell Li-ion and 3.3 V logic rails without level-shifting. |
| Full-Scale Range | ±2g / ±4g / ±8g - software-selectable to optimize dynamic range vs. resolution per application requirement. |
| Output Data Rate | Up to 1 kHz - supports real-time gesture recognition and rapid impact event capture. |
| Current Consumption | 350 µA (active), 5 µA (power-down) - enables multi-week operation on coin-cell batteries. |
| Interface | I²C (400 kHz) and SPI (10 MHz) - dual-protocol support simplifies host MCU compatibility across legacy and new designs. |
| Operating Temperature | –40 °C to +85 °C - validated for consumer electronics and industrial handheld equipment environments. |
| FIFO Depth | 32 samples - reduces host polling frequency and enables deterministic latency for motion-triggered wake-up. |
Pinout & Package
Supplied in a compact 16-pin LGA package (3 mm × 3 mm × 0.85 mm), the LIS331DLMTR uses a bottom-exposed pad for thermal dissipation and mechanical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Connects to regulated 2.16–3.6 V rail; decoupling capacitor required near pin. |
| GND | Ground reference | Common return path for analog and digital sections; tied to exposed pad. |
| SCL/SPC | I²C clock / SPI clock | Configurable as I²C SCL or SPI SPC; pulled high externally for I²C mode. |
| SDA/SDI | I²C data / SPI data in | Bi-directional I²C data line or unidirectional SPI input; requires pull-up for I²C. |
| SDO/SPSO | I²C address select / SPI data out | Configures I²C slave address (0x18/0x19) or outputs SPI data; open-drain. |
| INT1/INT2 | Programmable interrupt outputs | Dedicated push-pull or open-drain outputs for motion events; configurable via registers. |
| CS | SPI chip select | Active-low enable for SPI communication; must be held high for I²C operation. |
Key Features
| Feature | Design Value |
|---|---|
| Embedded FIFO buffer | 32-sample depth with watermark and overrun flags - offloads host CPU during continuous motion logging. |
| Self-test function | Electrostatic actuation verifies sensor functionality at power-on or runtime - eliminates need for external calibration fixtures. |
| Programmable interrupt engine | Two independent engines supporting free-fall, wake-up, and click/double-click detection - enables ultra-low-power system wake-up from sleep. |
| High-pass filter (HPF) | Configurable cut-off frequency (0.01 Hz to 1.6 kHz) - removes gravity offset for tilt-independent motion analysis. |
| Low-power mode | 5 µA shutdown current with fast wake-up (< 1 ms) - extends battery life in always-on sensing applications. |
Applications
| Smartphone Orientation Control | Wearable Activity Tracker |
|---|---|
Use Scenario: Detecting portrait/landscape rotation and screen auto-rotation in mobile handsets. IC Role / Device Role / Timing Role: Primary 3-axis motion sensor providing real-time acceleration vectors for OS-level orientation calculation. Use Value: Delivers stable ±2g range and 1 kHz ODR to resolve rapid device reorientation with <10 ms latency. | Use Scenario: Counting steps, detecting walking/running gait, and identifying sedentary periods in fitness bands. IC Role / Device Role / Timing Role: Low-power motion monitor triggering firmware-based activity classification algorithms. Use Value: Achieves >7-day battery life using 5 µA power-down mode and FIFO-driven burst sampling at 50 Hz. |
| Industrial Handheld Scanner | Remote-Controlled Toy Vehicle |
Use Scenario: Enabling drop detection and shock event logging during field use of rugged barcode scanners. IC Role / Device Role / Timing Role: Shock monitor generating interrupt on acceleration exceeding ±8g threshold within 10 ms. Use Value: Uses programmable free-fall and high-g interrupt generators to initiate protective shutdown before mechanical damage occurs. | Use Scenario: Implementing tilt-based steering and flip-detection in RC quadcopters and ground vehicles. IC Role / Device Role / Timing Role: Real-time attitude estimator feeding PID controller loops for stabilization feedback. Use Value: Provides 16-bit resolution and low noise (1.5 mg RMS) to resolve sub-degree tilt changes under motor vibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 3-axis digital accelerometer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LSM303DLHC | Integrated 3-axis accelerometer + 3-axis magnetometer; higher current draw (3 mA active); larger 24-pin LGA package. | Enables e-compass functionality but lacks dedicated FIFO interrupt chaining for pure motion triggers. | Select when heading estimation is required alongside motion sensing; avoid if minimizing BOM count and power is critical. |
| ADXL345 | Same 16-bit resolution and I²C/SPI interface; fixed ±2g/±4g/±8g/±16g ranges; no HPF; 13-bit effective resolution at ±16g. | Better suited for high-g shock monitoring but less optimized for low-noise tilt sensing below ±2g. | Prefer for impact detection systems; choose LIS331DLMTR when HPF-enabled motion isolation or lower standby current is mandatory. |
Compared with LSM303DLHC and ADXL345, the LIS331DLMTR offers superior power efficiency (350 µA vs. 3 mA or 140 µA with reduced features), dedicated HPF for tilt-invariant motion analysis, and smaller footprint - making it optimal for space-constrained, battery-sensitive motion-aware devices.
Availability
LIS331DLMTR is available at Aetrix Electronics and suitable for smartphone orientation control, wearable activity tracking, industrial handheld scanner drop protection, and remote-controlled toy vehicle stabilization requiring stable component supply and consistent parametric performance across production lots.
Supply support for LIS331DLMTR 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 electronics for industrial, consumer, and automotive markets.
The LIS331DLMTR belongs to ST's iNEMO inertial module family, engineered specifically for ultra-low-power, high-accuracy 3-axis motion sensing in portable and wearable electronics where size, power, and interrupt-driven responsiveness are critical.
FAQ
What is the maximum I²C clock frequency supported by the LIS331DLMTR?
The LIS331DLMTR supports standard-mode (100 kHz) and fast-mode (400 kHz) I²C communication. Fast-mode operation is confirmed in the official ST datasheet (Doc ID022203 Rev 6, Section 5.2), and requires proper pull-up resistor sizing (typically 2.2 kΩ) on SDA/SCL lines for reliable timing at 400 kHz.
Does the LIS331DLMTR require external components for basic operation?
Yes - a 100 nF ceramic decoupling capacitor is required between VDD and GND, placed as close as possible to the device pins. No external resistors or filters are needed for default I²C operation, though pull-up resistors (2.2–10 kΩ) on SDA/SCL are mandatory for bus functionality.
Can the LIS331DLMTR measure static tilt angles accurately?
Yes - with its ±2g full-scale range and 16-bit output resolution, the LIS331DLMTR resolves tilt down to ~0.01° under stable conditions. Accuracy depends on calibration and use of the integrated high-pass filter to remove drift; raw DC-coupled output includes gravity vector and motion components.
Is the LIS331DLMTR qualified for automotive applications?
No - the LIS331DLMTR is specified for industrial and consumer temperature ranges (–40 °C to +85 °C) and is not AEC-Q100 qualified. ST offers automotive-grade alternatives such as the LIS2DH12 or LIS3DH for safety-critical vehicle systems requiring extended qualification and enhanced robustness.
LIS331DLMTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 16-VFLGA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Digital
- Axis:
- X, Y, Z
- Acceleration Range:
- ±2g, 4g, 8g
- Sensitivity (LSB/g):
- 64 (±2g) ~ 16 (±8g)
- Sensitivity (mV/g):
- -
- Bandwidth:
- 25Hz ~ 200Hz
- Output Type:
- I2C, SPI
- Voltage - Supply:
- 2.16V ~ 3.6V
- Features:
- Adjustable Bandwidth, Selectable Scale, Sleep Mode
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-LGA (3x3)
LIS331DLMTR FAQ
1.How can I place an order for LIS331DLMTR through Aetrix?
Please submit a Request for Quotation (RFQ) for LIS331DLMTR 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 LIS331DLMTR reliable?
The price and inventory of LIS331DLMTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LIS331DLMTR is usually 5 days.
3.What payment methods are accepted for LIS331DLMTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LIS331DLMTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LIS331DLMTR?
LIS331DLMTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LIS331DLMTR 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 LIS331DLMTR?
For technical support, including LIS331DLMTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LIS331DLMTR requirements.
6.How does Aetrix verify that LIS331DLMTR is sourced from the original manufacturer or authorized distributors?
All LIS331DLMTR 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 LIS331DLMTR meets industry standards.
7.What is the process for return or replacement of LIS331DLMTR?
All LIS331DLMTR units undergo pre-shipment inspection (PSI). If there is an issue with LIS331DLMTR, 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 LIS331DLMTR part is unused and in its original packaging.
Return procedure for LIS331DLMTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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