Overview
The LIS331DLM is an ultra low-power, high-performance three-axis linear accelerometer developed by STMicroelectronics. It belongs to the 'nano' family and features a digital I2C/SPI serial interface. This device is designed for advanced power saving and includes smart sleep to wake-up functions, making it ideal for applications requiring low power consumption.
The accelerometer offers dynamically user-selectable full scales of ±2g, ±4g, and ±8g, and it can measure accelerations with output data rates ranging from 0.5 Hz to 400 Hz. The device also includes a self-test capability to verify its functioning in the final application.
The LIS331DLM is packaged in a small, thin plastic Land Grid Array (LGA) and operates over an extended temperature range from -40 °C to +85 °C.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Supply Voltage (Vdd) | 2.16 | 2.5 | 3.6 | V |
| I/O Pins Supply Voltage (Vdd_IO) | 1.71 | Vdd+0.1 | V | |
| Current Consumption in Normal Mode (Idd) | 250 | µA | ||
| Current Consumption in Low-Power Mode (IddLP) | 10 | µA | ||
| Current Consumption in Power-Down Mode (IddPdn) | 1 | µA | ||
| Digital High Level Input Voltage (VIH) | 0.8*Vdd_IO | V | ||
| Digital Low Level Input Voltage (VIL) | 0.2*Vdd_IO | V | ||
| High Level Output Voltage (VOH) | 0.9*Vdd_IO | V | ||
| Low Level Output Voltage (VOL) | 0.1*Vdd_IO | V | ||
| Output Data Rate (ODR) in Normal Mode | 50 | 100 | 400 | Hz |
| Output Data Rate (ODRLP) in Low-Power Mode | 0.5 | 1 | 10 | Hz |
| System Bandwidth (BW) | ODR/2 | Hz | ||
| Turn-on Time (Ton) | 1/ODR+1ms | s | ||
| Operating Temperature Range (Top) | -40 | +85 | °C |
Key Features
- Ultra low-power operational modes with consumption down to 10 µA in low-power mode
- Dynamically user-selectable full scales of ±2g, ±4g, and ±8g
- I2C/SPI digital output interface
- 8-bit resolution
- Wide supply voltage range from 2.16 V to 3.6 V
- Low voltage compatible I/Os (1.8 V)
- Embedded self-test capability
- 6D orientation detection
- 10000 g high shock survivability
- ECOPACK® RoHS and 'Green' compliant
- Two independent programmable interrupt generators for free-fall and motion detection
- Sleep to wake-up function
Applications
- Motion activated functions
- Free-fall detection
- Intelligent power saving for handheld devices
- Pedometer
- Display orientation
- Gaming and virtual reality input devices
- Impact recognition and logging
- Vibration monitoring and compensation
Q & A
- What is the LIS331DLM accelerometer?
The LIS331DLM is an ultra low-power, high-performance three-axis linear accelerometer developed by STMicroelectronics.
- What are the dynamically user-selectable full scales of the LIS331DLM?
The LIS331DLM has dynamically user-selectable full scales of ±2g, ±4g, and ±8g.
- What are the output data rates of the LIS331DLM?
The output data rates range from 0.5 Hz to 400 Hz.
- What is the power consumption of the LIS331DLM in low-power mode?
The power consumption in low-power mode is down to 10 µA.
- Does the LIS331DLM support I2C and SPI interfaces?
Yes, the LIS331DLM supports both I2C and SPI digital output interfaces.
- What is the resolution of the LIS331DLM?
The resolution of the LIS331DLM is 8 bits.
- What are the operating temperature ranges of the LIS331DLM?
The operating temperature range is from -40 °C to +85 °C.
- Is the LIS331DLM RoHS and 'Green' compliant?
Yes, the LIS331DLM is ECOPACK® RoHS and 'Green' compliant.
- What are some common applications of the LIS331DLM?
Common applications include motion activated functions, free-fall detection, pedometer, display orientation, gaming and virtual reality input devices, impact recognition, and vibration monitoring.
- Does the LIS331DLM have self-test capability?
Yes, the LIS331DLM has an embedded self-test capability to check its functioning in the final application.
