For modulator output bitstream filtering, a device from TI's C2000™ or Sitara™ microcontroller families is recommended. These families support up to eight channels of dedicated hardwired filter structures that significantly simplify system level design by offering two filtering paths per channel: one providing high-accuracy results for the control loop and one fast-response path for overcurrent detection.

A delta-sigma modulator filter calculator is available for download at www.ti.com that aids in the filter design and selecting the right OSR and filter-order to achieve the desired output resolution and filter response time.