The modulators have high dynamic range and low total harmonic distortion with very low power consumption. They convert differential analog input signals from the CS3301A / CS3302A amplifiers to an oversampled serial bit stream at 512 kbits per second. This oversampled bit stream is then decimated by the CS5376A digital filter to a 24-bit output at the selected output word rate. In normal operation, power consumption is 5 mA per channel. Each modulator can be independently powered down to 500 A per channel, and by halting the input clock they will enter a micro-power state using only 2 A per channel.