Murata offers 3-axis MEMS accelerometer

November 12, 2016 // By Graham Prophet
Murata's SCA3300 series of 3-axis MEMS accelerometers aimed at a broad range of industrial and automotive applications. Measuring 7.6 x 8.6 x 3.3 mm this small surface mounted MEMS sensor offers a user selectable measurement range of 1.5g, 3g or 6g and features better than 10 mg offset stability.

Presented as offering best-in-class characteristics for MEMS sensor inclination measurements the SCA3300 series has a non-linearity of 0.1% and typical noise density 37 µg/√Hz. Mechanical over-damping of the sensor enables high performance measurements in harsh, vibrating environments.

This compact sensor, packaged in a pre-moulded dual flat lead SMD housing operates from a 3.3 VDC supply and consumes 1 mA during normal operation making it suitable for battery powered applications. In its low power mode, consumption drops to about 0.5 mA. Communication with the host application is via an industry standard SPI interface.

The SCA3300 is a reliable 3D MEMS sensor that is qualified according to the automotive AEC-Q100 quality standard. The sensor also features extensive failsafe functions and flags for diagnostics. These include monitoring of an internal reference signal, checksum techniques for verifying communication and signal saturation / over range monitoring. A unique diagnostic feature is continuously running self-test that verifies the proper operation of whole signal chain from MEMS sensor movement to signal conditioning circuitry in each measurement cycle.

Operating temperature range is from – 40 degrees C to + 125 degrees C.

Target applications for the SCA3300 include levelling and alignment systems, inertial measurement units for heavy machinery, navigation systems, AGVs, and construction and surveying tools. There is also a wide range of different future applications in high accuracy automotive inertial sensing, such as in autonomous driving (ADAS) and intelligent transmission control, to inclination sensing in weighing scales.

An evaluation board is available for the SCA3300 that incorporates a Java-based GUI to graph sensor output, data logging and data rate calculations.