LIS2DW12TR | STMicroelectronics | Femto Series 3-axis MEMS Digital Accelerometer

Package: LGA-12, 2.0×2.0×0.7mm

Supply Voltage: 1.62V ~ 3.6V, compatible with 1.8V/3.3V systems

Measurement Range: ±2g / ±4g / ±8g / ±16g, software-selectable

Output Resolution: 16-bit

Output Data Rate (ODR): 1.6Hz ~ 1600Hz

Communication Interface: Dual I2C + SPI, 2 independent interrupt pins INT1, INT2

Power Consumption (Key Selling Points)

- Power-down Mode: 50nA

- Always-on Low-power Mode: <1μA

- High-performance Mode: 90μA

Noise: Minimum 1.3mg RMS in low-power mode

Operating Temperature: -40℃ ~ +85℃ (Consumer / Industrial grade, non-AEC-Q100 non-automotive)

Shock Resistance: 10000g

On-chip Features: 32-level FIFO buffer, internal temperature sensor, self-test function

Compliance: RoHS, ECOPACK2

### Functions

Measures X/Y/Z 3-axis acceleration, tilt and vibration. Built-in hardware event engine. No continuous data polling by MCU required. Events are judged by hardware and trigger interrupt signals:

- Motion / stationary detection, wake-up & sleep (core power-saving feature)

- Single-tap and double-tap recognition (gesture detection)

- 6D/4D orientation detection (landscape/portrait, tilt judgment)

- Free-fall detection

- Vibration, rollover and body movement detection

- FIFO buffer reduces MCU polling frequency and lowers overall system power consumption

### Applications

Wearable devices: Smart bands, smart watches, TWS earbuds, smart rings (pedometer, lift-to-wake, wear detection, tap control)

Healthcare / sleep monitoring (key target application): Smart mattresses, patient monitoring beds for human rollover and body movement detection. Combined with Murata BCGMCU to form an integrated sleep monitoring solution for heart rate, respiration and body movement.

Battery-powered IoT devices: Asset tracking tags, door/window sensors, wireless sensing nodes

Consumer electronics: Remote controllers, smart glasses, small home appliance orientation detection

Industrial: Equipment vibration monitoring, tilt alarm, portable instruments