CS44800-CQZR

Audio Special Purpose Overview

The CS44800-CQZR is an 8-channel digital-to-PWM Class D audio system controller manufactured by Cirrus Logic. It integrates interpolation, sample rate conversion, half- and full-bridge PWM driver outputs, and power supply rejection feedback within a 64-pin LQFP package. The device supports sample rates from 32 kHz to 192 kHz and features an internal oscillator circuit for crystals between 24.576 MHz and 54 MHz. Key electrical specifications include greater than 100 dB dynamic range and less than 0.03% THD+N at 1 W output. It operates on a voltage supply of 2.5 V to 5.0 V and functions within a temperature range of -10°C to +70°C.

Audio Special Purpose Feature Summary

• Integrated Sample Rate Converter (SRC) eliminates clock jitter effects and allows input sample rate independent operation.
• Power Supply Rejection Realtime Feedback mechanism enhances system stability.
• Spread Spectrum Modulation reduces electromagnetic interference (EMI).
• Digital Volume Control with Soft Ramp provides adjustment from +24 to -127 dB in 0.25 dB steps.

Audio Special Purpose Applications

• A/V receivers
• DVD receivers
• Digital speaker systems
• Automotive audio systems

Audio Special Purpose Procurement Notes

Verify the specific ordering suffix CQZR against manufacturer documentation to confirm packaging details. Ensure compatibility with I2C or SPI host control interfaces during integration. Confirm that the 64-LQFP (10x10) package dimensions align with the target PCB layout constraints.

Audio Special Purpose Selection Notes

Select this component for applications requiring high channel count digital amplification with minimal analog signal degradation. The integrated SRC is critical for systems with multiple asynchronous audio sources. Verify that the external power stage can interface correctly with the half- and full-bridge PWM outputs provided by the controller.

Audio Special Purpose Part Context

This part belongs to the Cirrus Logic CS44800 series of multi-channel digital amplifier controllers. It is designed to maintain digital signal integrity up to the final output filter, minimizing analog interference. The architecture supports efficient Class D amplification with over 90% efficiency, reducing heat sink requirements and power supply size.

Audio Special Purpose Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Evaluate alternative 8-channel digital amplifier controllers based on pinout compatibility and register map similarities if direct replacement is required.

Audio Special Purpose FAQ

What crystal frequencies does the internal oscillator support?

The internal oscillator circuit supports crystals ranging from 24.576 MHz to 54 MHz.

How does the device handle clock jitter?

The integrated Sample Rate Converter (SRC) eliminates clock jitter effects, allowing for input sample rate independent operation.

What is the resolution of the digital volume control?

The digital volume control offers soft ramp functionality with adjustments in 0.25 dB steps, ranging from +24 dB to -127 dB.