LIS2DWLTR (STMicroelectronics Femto Series) is a pure 3-axis MEMS accelerometer with no gyroscope or magnetometer, featuring ultra-low power.

X/Y/Z 3-axis acceleration acquisition, detects gravity, tilt, vibration, shock and drop.

Built-in motion detection engine: single/double-tap detection, free-fall detection, wake-up/sleep, activity/inactivity recognition, 6D/4D orientation detection (screen portrait/landscape switch).

16-bit digital output with integrated 32-level FIFO to reduce MCU reading frequency and lighten host controller load.

On-chip self-test and integrated temperature sensor.

Dual interfaces of I2C + SPI for flexible switching; independent IO supply, compatible with low-voltage MCUs.

Multiple power modes available. Sleep current as low as 50nA, suitable for long-life battery-powered applications.

Key Parameters

Package: LGA-12, 2.0×2.0mm, 0.7mm thickness, black molded leadless surface-mount package

Supply voltage: 1.62V ~ 3.6V with independent IO power supply

Selectable acceleration full scale: ±2g / ±4g / ±8g / ±16g

Output data rate (ODR): programmable from 1.6Hz to 1600Hz

Noise: minimum 1.3mg RMS in low-power mode

Power consumption: 50nA in power-down mode; <1μA in active low-power mode; typical 90μA in high-performance mode

Shock resistance: withstands 10000g transient shock

Operating temperature: -40℃ ~ +85℃

Output: 16-bit digital data

Environmental compliance: RoHS / ECOPACK

Applications

Important note: Only accelerometer, no gyroscope or magnetometer; cannot output heading angle directly.

Wearable devices: smart watches, fitness bands, TWS earbuds (wear detection, step counting, lift-to-wake, gesture double tap)

Consumer electronics: remote controllers, gamepads, tablet/phone screen rotation, drop protection

Low-power IoT asset tags: vibration monitoring, tilt alarm, long-term battery-powered tracking

Smart home: door & window attitude detection, appliance tilt protection

Simple industrial monitoring: equipment vibration, shock logging, logistics drop monitoring

Pedometers, sports bands, wireless sensor nodes

One-line Summary

The ST LIS2DWLTR is a Femto series ultra-low-power 3-axis accelerometer in a tiny 2×2mm LGA package. It supports double-tap, wake-up and 6D orientation detection with sleep current down to 50nA, ideal for battery-powered wearables and IoT asset tags.