The CS4461 is a complete analog/digital converter (ADC) 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 multibit conversion at up to 7.5MHz. This A/D converter provides 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. The CS4461 A/D converter and the CS44600/800 Class-D digital amplifiers provide a simple, small and cost-effective solution for DVD receivers, home theater recorders and entry-level audio/video receivers and home-theater-in-a-box systems.
- Advanced multibit delta-sigma architecture
- Real-time feedback of power-supply conditions
- Filterless digital output resulting in very low signal delay
- 135mW Power consumption
- Support for logic levels between 3.3V and 5V
- Differential analog architecture
- Modulator overflow detection
- Direct interface to CS44600/800 Class-D PWM modulator
- Multibit conversion at up to 7.5MHz
- Delivery of modulated data over 2-wire interface
