Digital Amplifier Controller 64-Pin LQFP

The CS44800 is a multi-channel digital-to-PWM Class D audio system controller including interpolation, sample rateconversion, half- and full-bridge PWM driver outputs, and power supply rejection feedback in a 64-pin LQFP package.Thearchitecture uses a direct-to-digital approach that maintains digital signal integrity to the final output filter,minimizing analog interference effects which negatively affect system performance.The CS44800 integrates on-chip digital volume control, peak detect with limiter, de-emphasis, and 7 GPIO’s, allowingeasy interfacing to many commonly available power stages. The PWM amplifier can achieve greater than 90%efficiency. This efficiency provides for smaller device package, less heat sink requirements, and smaller powersupplies.The CS44800 is ideal for audio systems requiring wide dynamic range, negligible distortion and low noise, such asA/V receivers, DVD receivers, digital speaker and automotive audio systems.

• > 100 dB Dynamic Range - System Level
• < 0.03% THD+N @ 1 W - System Level
• 32 kHz to 192 kHz Sample Rates
• Internal Oscillator Circuit Supports 24.576 MHz to 54 MHz Crystals
• Integrated Sample Rate Converter (SRC)
  • Eliminates Clock Jitter Effects
  • Input Sample Rate Independent Operation
• Power Supply Rejection Realtime Feedback
• Spread Spectrum Modulation - Reduces EMI
• PWM Popguard® for Single-Ended Mode
• Eliminates AM Frequency Interference
• Programmable Load Compensation Filters
• Support for up to 40 kHz Audio Bandwidth
• Digital Volume Control with Soft Ramp
  • +24 to -127 dB in 0.25 dB Steps
• Per Channel Programmable Peak Detect and Limiter
• SPI™ and I²C® Host Control Interfaces
• Separate 2.5 V to 5.0 V Serial Port and Host Control Port Supplies