Adafruit MSA311 Triple Axis Accelerometer

The MSA311 is a super small and low-cost triple-axis accelerometer. It's inexpensive, but has just about every 'extra' you'd want in an accelerometer:

• Three-axis sensing, 14-bit resolution
• ±2g/±4g/±8g/±16g selectable scaling
• I2C interface on fixed I2C address 0x62
• Interrupt output
• Multiple data rate options 1 Hz to 500 Hz
• As low as 2uA current draw in low power mode (just the chip itself, not including any supporting circuitry)
• Tap, Double-tap, orientation & freefall detection
• The MSA311 is very similar to the MSA301, but is not a drop-in replacement. The I2C address has changed from 0x26 to 0x62!

This sensor communicates over I2C or SPI (Adafruits library code supports both) so you can share it with a bunch of other sensors on the same I2C bus. There's an address selection pin so you can have two accelerometers share an I2C bus.

To get you going fast, Adafruit have spun up a custom-made PCB in the STEMMA QT form factor, making them easy to interface with. The STEMMA QT connectors on either side are compatible with the SparkFun Qwiic I2C connectors. This allows you to make solderless connections between your development board and the MSA311 or to chain with a wide range of other sensors and accessories using a compatible cable.

Quick Spec

• Chip: EMC2101
• Supply Voltage: 3 V to 5 V DC
• Maximum Current: 1000 µA
• Temperature Monitoring
• Temperature Measurement Range: from -40°C to 125°C
• External Channel: accuracy of measurement ± 1°C (at 25°C)
• Internal Channel: accuracy of measurement ± 2°C
• Communication Interface: I2C
• Interface Address: 0x5C
• Automatic compensation
• Resistance error correction
• Warning of exceeding the declared temperature
• Compatible with SM Bus
• Selectable PWM or DAC fan controller output
• Dimensions: 25.2 x 17.7 x 4.6mm
• Net Weight: 4g

Resources

• Product Page
• Product Wiki
• EMC2101 Datasheet

Shipping List

• 1 x Adafruit MSA311 Triple Axis Accelerometer