The LIS2DW12TR is an ultra-low-power 3-axis MEMS accelerometer manufactured by STMicroelectronics (ST).

I. Overview

LIS2DWLTR is the common market name for LIS2DW12TR.

Manufacturer: STMicroelectronics (ST)Device Type: 3-axis MEMS accelerometerProduct Family: Femto ultra-low power seriesPackage: LGA-12, ultra-thin surface-mount package with a thickness of 0.7 mmPacking Form: TR stands for Tape & ReelGrade: Consumer & industrial grade (non-automotive)

II. Key Parameters

1) Basic Specifications

Part Number: LIS2DWLTR (LIS2DW12TR)Configuration: 3-axis accelerometer (X/Y/Z), no gyroscope integratedPackage: LGA-12, 12-pad leadless ultra-thin packageOperating Temperature: -40℃ ~ +85℃Supply Voltage: 1.62 V ~ 3.6 V (compatible with battery power supply)

2) Core Parameters for Selection

Programmable Full Scale: ±2 g / ±4 g / ±8 g / ±16 gOutput Data Rate: 1.6 Hz ~ 1600 Hz

Power Consumption (Key Advantage):

• Power-down Mode: 50 nA

• Low-power Mode: < 1 μA

• High-performance Mode: Approximately 90 μA

Communication Interfaces: I²C (mainstream) / High-speed SPIFIFO: 32-level (reduces MCU wake-up frequency for power saving)Built-in Function Engine: Single/double tap detection, free fall detection, wake-up function, 6D orientation, activity/inactivity detection

III. Core Functions

• Linear acceleration measurement: Output real-time 3-axis acceleration data to calculate attitude (tilt / flip), vibration and impact.

• Motion event detection (no continuous MCU polling required):

• Single/double tap: Song switching for earbuds, screen wake-up for smart watches, key control for remote controllers

• Free fall: Drop protection for mobile phones and hard drives

• Wake-up & sleep mode: Screen activation by raising hand, auto sleep after placement

• 6D orientation: Automatic screen rotation for landscape/portrait mode

• Activity/inactivity detection: Pedometer, sleep monitoring, unattended wake-up

• Ultra-low power monitoring: Features microampere-level current draw, supporting multi-year battery life for long-term powered devices.

IV. Application Scope

1) Wearable Devices (Primary Application)

• Smart watches & fitness bands: Pedometer, sleep monitoring, raise-to-wake, attitude recognition

• Wireless earbuds: Wear detection (auto sleep when removed), tap control for music switching & call answering

• Smart glasses & AR devices: Attitude tracking and drop prevention

2) Consumer Electronics

• Smartphones & tablets: Screen rotation, motion control and drop protection

• Remote controllers & gamepads: Motion gesture recognition and tap control

• Cameras & pan-tilt units: Tilt detection and anti-shake assistance

3) IoT & Smart Home

• Wireless sensor nodes: Vibration monitoring, door & window attitude detection, low-power wake-up

• Smart home appliances: Tilt protection for washing machines, vibration monitoring for refrigerators

• Pet & asset trackers: Motion monitoring and anti-loss alarm

4) General Industrial Applications

• Equipment condition monitoring: Vibration, impact and tilt detection

• Logistics transportation: Drop and tilt event recording

• Low-power meters: Long-term monitoring with battery power supply

V. Summary

The LIS2DWLTR is a 3-axis ultra-low power accelerometer from ST. It adopts LGA-12 ultra-thin package with programmable full scale from ±2 g to ±16 g. Featuring microampere-level power consumption, it excels at attitude, motion and tap detection. It is widely used for wearables, earbuds, IoT devices and consumer electronics, and is not qualified for automotive applications (use ASM330LHH for automotive scenarios).