I'm designing an audio DAC based on the PCM1690 from TI. Datasheet
One requirement of the DAC is differential outputs. Since the PCM1690 has differential outputs, this is not a problem. However, the design of the low pass output filter is unclear for me. Figure 40 of the datasheet shows an example circuit, but this circuit converts the signal also from differential to single ended. What changes are needed to make this circuit a differential low pass filter alone? My assumption is to remove C1 and R1, R2 and R3 connected to the + input of the opamp. Is this correct?