
SparkFun Triple Axis Accelerometer Breakouts
SparkFun Triple Axis Accelerometer Breakouts are simple Qwiic breakouts for the KX134 and KX132 digital accelerometers. These accelerometers are low-power and 16-bit resolution three-axis accelerometers and offer a 10kHz output data rate. The KX134 is capable of measuring ±8g/16g/32g/64g (user-selectable) and KX132 is capable of measuring ±2g/4g/8g/16g. The triple-axis accelerometers offer lower noise and improved linearity over the entire temperature range. These silicon micro-machined accelerometers feature a user-configurable 3-stage Advanced Data Path (ADP) consisting of a low-pass filter, low-pass/high-pass filter, and RMS calculation engine. The accelerometers feature internal voltage regulators that are used to maintain constant internal operating voltages over the 1.7V to 3.6V operating voltage range. This results in stable operating characteristics even if the supply voltage changes. The triple-axis accelerometer breakouts operate at the -40ºC to +105ºC temperature range. The KX-134 is ideal for high-g measurements and KX-132 is ideal for a wide range of acceleration measurements as well as high-speed applications such as vibration sensing and tap sensing.Features
- High-resolution wake-up and back-to-sleep detection with a configurable threshold as low as 3.9mg for KX-132 and 15.6mg for KX-134
- ±8g, ±16g, ±32g, ±64g measurement range (User selectable)
- 8-bit or 16-bit high resolution
- Up to 25600Hz user-configurable Output Data Rate (ODR)
- User-configurable 3-stage advanced data path featuring low-pass filter, low-pass/high-pass filter, and RMS calculation engine
- Wide range of built-in sensing functions:
- Free fall
- Directional-Tap™/Double-Tap™
- Device orientation and activity algorithms
- 130µg/√Hz low noise (varies based on ODR, power mode, and other settings)
- High-resolution wake-up and back-to-sleep detection with a configurable threshold as low as 3.9mg
- Selectable low-power or high-performance operating modes
- I2C address:
- 0x1E (0x1F alternate)
- User accessible manufacturer and part ID registers
- Internal voltage regulator
- Self-test functionality
- Up to 3.4MHz digital I2C and up to 10MHz digital SPI
- 2x Qwiic connectors
- SPI available on PTH header pins
- RoHS compliant
Specifications
- Low power with integrated voltage regulator:
- 148µA high performance operating current consumption (400Hz ODR + Wake-up detection)
- 0.53µA low power operating current consumption (0.781Hz ODR + Wake-up detection)
- 0.5µA standby current consumption
- -40ºC to +105ºC operating temperature range
- 2mm x 2mm x 0.9mm LGA 12-pin package
- 512-byte FIFO buffer that continues recording data while being read
Block Diagram

Application Circuit Diagram

Published: 2021-06-15
| Updated: 2023-04-12