The CS4461 is a complete analog-to-digital (A/D) converter for Class-D PSR (power-supply rejection) feedback. It performs sampling and A/D conversion, generating digital data for input to a Class-D modulator.
The CS4461's advanced Delta-Sigma architecture allows differential analog inputs that provide excellent noise rejection and multi-bit conversion at up to 7.5 MHz.
This A/D converter gives real-time feedback of power-supply conditions to a Class-D modulator via a direct interface, resulting in very low signal delay. Improved PSR feedback allows the systems designer to use lower cost power supplies, resulting in a lower bill-of-materials (BOM) cost. Systems developers can further lower BOM costs by developing single-ended (half-bridge) solutions as opposed to differential (full-bridge) solutions.