Extended Bandwidth for MEMS Open-Loop Accelerometers

Physical Logic has published measurement results from tests performed on a number of units of its MAXL-OL-2040C MEMS accelerometer, which were modified to provide a larger signal bandwidth. The modification and tests were performed following growing interest from the company’s customers in an extended bandwidth version of the product.

The MAXL-OL-2040C is a MEMS open-loop accelerometer designed to provide high stability and low-noise measurement. With a one year bias repeatability of 4 mg and one year scale factor repeatability of 600 ppm, it is ideal for inertial navigation applications in robotics and unmanned systems. The standard product provides a ±40g sensing range and a bandwidth of 300 Hz.

The graph below shows the frequency response results from testing performed on 5 units at Physical Logic’s premises. The data in the graph is raw and includes frequency noise that originates from the measurement setup and not from the accelerometers. However, the general trend, which does represent the frequency response of the accelerometers, shows signal response of up to 2000 Hz using a +/- 3dB definition.