LIS3DH
Ultra low-power high-performance 3-axis accelerometer with ±2g/±4g/±8g/±16g selectable full-scale, digital I2C/SPI interface, and embedded temperature sensor.
Product Overview
Description
The LIS3DH is an ultra low-power high-performance 3-axis linear accelerometer with digital I2C/SPI serial interface standard output.
It features selectable full-scale ranges of ±2g/±4g/±8g/±16g and measures acceleration with output data rates from 1Hz to 5.3kHz.
The device includes smart embedded functions such as free-fall detection, motion detection, and click/double-click recognition, making it ideal for battery-powered motion sensing applications.
Product Series
Primary Application
Key Features
- Ultra low-power consumption: 2μA
- Selectable full-scale: ±2g/±4g/±8g/±16g
- High resolution: 16-bit data output
- Embedded FIFO (32 levels)
- Free-fall and motion detection
- Click/double-click recognition
- I2C and SPI interfaces
Specifications
| Measurement Range | ±2g/±4g/±8g/±16g |
|---|---|
| Sensitivity | 1mg/digit (±2g) |
| Interface | I2C/SPI |
| ODR Range | 1Hz to 5.3kHz |
| Operating Current | 2μA (low-power mode) |
| Package | LGA-16 (3x3mm) |
| Voltage Rating | N/A |
| Current Rating | N/A |
| Temperature Range | -40°C to +85°C |
Applications
Activity monitoring
Industrial application for Ultra Low-Power 3-Axis Accelerometer
Free-fall detection
Industrial application for Ultra Low-Power 3-Axis Accelerometer
Motion-activated functions
Industrial application for Ultra Low-Power 3-Axis Accelerometer
Tap/double-tap detection
Industrial application for Ultra Low-Power 3-Axis Accelerometer
Tilt sensing
Industrial application for Ultra Low-Power 3-Axis Accelerometer
Wearable devices
Industrial application for Ultra Low-Power 3-Axis Accelerometer
FAE Expert Insights
"The LIS3DH is a workhorse accelerometer that I've used in countless designs. The ultra-low power consumption (2μA in low-power mode) is perfect for battery-powered wearables and IoT devices. The embedded motion detection features are particularly valuable - you can wake the main MCU only when motion is detected, saving significant power. The click detection is great for user interface applications like tap-to-wake. The FIFO is useful for logging motion data without waking the host processor constantly. I typically use this in fitness trackers, smart watches, and any application requiring motion detection with long battery life. The 3x3mm package is compact but still easy to handle during assembly. Overall, a reliable and cost-effective accelerometer for motion sensing applications."
Ultra low-power accelerometer with embedded motion detection features
— Lisa Chen, BeiLuo
Frequently Asked Questions
What is the power consumption in different modes?
Power consumption by mode: Normal mode: ~10μA at 10Hz ODR; Low-power mode: ~2μA at 10Hz ODR; Power-down mode: ~0.5μA. The low-power mode reduces resolution to 8-bit but maintains functionality for motion detection. For always-on applications, use low-power mode. For high-resolution sampling, use normal mode. The embedded features (free-fall, motion detection) work in both modes.
Use low-power mode for always-on motion detection. Use normal mode for high-resolution data acquisition.
How does the embedded motion detection work?
The LIS3DH includes hardware motion detection: Free-fall detection: Triggers when acceleration < threshold on all axes; Motion detection: Triggers when acceleration change exceeds threshold; Click detection: Detects single and double taps. These features operate autonomously without host MCU intervention. Configure thresholds and duration via registers. The INT pin signals events to wake the host MCU. This enables significant power savings by keeping the host in sleep mode until motion events occur.
Use embedded features to minimize host MCU wake time and extend battery life.