SCA3300
High-precision 3-axis accelerometer with selectable ranges and digital interface for motion sensing applications
Product Overview
Description
The SCA3300 is a high-performance 3-axis MEMS accelerometer designed for demanding motion sensing applications. It features selectable measurement ranges of ±2g, ±4g, or ±8g, allowing flexible configuration for different application requirements.
With ultra-low noise of 150μg/√Hz and high 14-bit resolution, the SCA3300 provides precise acceleration measurement for applications such as motion tracking, vibration analysis, and orientation detection. The sensor includes advanced features like programmable digital filters, motion detection interrupts, and free-fall detection.
The device supports both I2C and SPI digital interfaces for easy integration with microcontrollers. Low power consumption (130μA in measurement mode) makes it ideal for battery-powered devices. Available in a compact LGA-16 package, the SCA3300 is suitable for space-constrained applications in smartphones, wearables, and IoT devices.
Product Series
SCA
Primary Application
Smartphones and tablets
Key Features
- Selectable measurement ranges: ±2g/±4g/±8g
- Ultra-low noise: 150μg/√Hz
- High 14-bit resolution
- Programmable digital filters
- Motion detection and free-fall interrupts
- I2C and SPI interface support
- Low power consumption: 130μA
- Compact 3mm x 3mm package
Specifications
| Measurement Range | ±2g/±4g/±8g (selectable) |
|---|---|
| Sensitivity | 0.06mg/LSB (±2g range) |
| Noise | 150μg/√Hz |
| Bandwidth | 0.5Hz - 1kHz (programmable) |
| Resolution | 14-bit |
| Interface | I2C/SPI |
| Operating Current | 130μA (measurement mode) |
| Operating Temperature | -40°C to +85°C |
| Package | LGA-16 (3mm x 3mm) |
Applications
Smartphones and tablets
Electronic system design
Wearable devices
Electronic system design
IoT sensors
Sensor signal conditioning
Game controllers
Industrial automation and control
Industrial vibration monitoring
Industrial automation and control
FAE Expert Insights
"The SCA3300 is an excellent accelerometer that I've successfully integrated into numerous projects. The selectable measurement ranges are particularly useful - you can use ±2g for high-precision tilt sensing or ±8g for motion tracking in more dynamic applications. The noise performance of 150μg/√Hz is impressive for this price point, rivaling more expensive competitors. I especially appreciate the built-in motion detection interrupts which enable wake-on-motion functionality without requiring continuous MCU polling. One implementation tip: the programmable filters are very effective for reducing noise in vibration monitoring applications. For best results, mount the sensor close to the measurement point and use the recommended PCB layout. The I2C interface works reliably up to 400kHz, and the SPI interface is great for applications requiring higher data rates. Overall, a solid performer with excellent value."
Excellent 3-axis accelerometer with selectable ranges and ultra-low noise performance
— Dr. Li Wei, BeiLuo
Frequently Asked Questions
What measurement ranges are available for SCA3300?
SCA3300 offers selectable measurement ranges of ±2g, ±4g, and ±8g. The range can be configured via register settings to optimize for different applications. Use ±2g for high-precision tilt sensing, ±4g for general motion detection, and ±8g for high-dynamic applications like gaming or sports monitoring.
Select range based on expected acceleration in your application; use lowest range for best resolution.
What is the noise performance of SCA3300?
SCA3300 achieves ultra-low noise of 150μg/√Hz, which is excellent for this class of accelerometer. This low noise enables detection of subtle vibrations and precise tilt measurement. The noise can be further reduced by using the built-in digital low-pass filters at the expense of bandwidth.
Use digital filters to trade bandwidth for lower noise; select filter setting based on application requirements.
How do I interface with SCA3300?
SCA3300 supports both I2C (up to 400kHz) and SPI (up to 10MHz) interfaces. I2C is recommended for simple wiring with multiple sensors on the same bus. SPI provides higher data rates and is better for applications requiring fast sampling. The sensor uses standard protocols and is easy to interface with most microcontrollers.
Use I2C for simple multi-sensor designs; SPI for high-speed data acquisition.
What interrupt features does SCA3300 support?
SCA3300 includes programmable interrupt generators for motion detection, free-fall detection, and orientation changes. These interrupts can wake up the host microcontroller from sleep mode, enabling power-efficient operation. The interrupt thresholds and durations are configurable via registers.
Use interrupts for wake-on-motion applications; configure thresholds based on sensitivity requirements.
What is the power consumption of SCA3300?
SCA3300 consumes 130μA in normal measurement mode and can be reduced to 2μA in sleep mode. The sensor also features auto-sleep functionality that automatically enters low-power mode when no motion is detected. This makes it ideal for battery-powered applications.
Use sleep mode when sensor is not needed; enable auto-sleep for battery-powered applications.