CS44L11-CZZ

Audio Amplifiers Overview

The CS44L11-CZZ is a stereo digital-to-PWM Class-D audio amplifier system controller by Cirrus Logic Inc., housed in a 16-pin TSSOP package. It integrates interpolation, volume control, and headphone amplification using a direct-to-digital architecture to maintain signal integrity. The device operates on analog and digital supplies ranging from 1.8 V to 2.4 V. It supports sample rates up to 96 kHz and delivers up to 95 dB of dynamic range. Key specifications include programmable digital volume control from +18 to -96 dB, selectable bass and treble boosts, and peak signal limiting.

Audio Amplifiers Feature Summary

• Integrates stereo digital-to-PWM Class-D amplification with on-chip interpolation and headphone drivers.
• Provides programmable digital tone control with selectable high-pass and low-pass corner frequencies for bass and treble adjustments.
• Includes PWM PopGuard technology to minimize audible transients during power-up and power-down sequences.

Audio Amplifiers Applications

• Portable audio systems
• Headphone amplifiers
• Mobile phones

Audio Amplifiers Procurement Notes

Verify the component status as the source document is dated July 2005 and labeled preliminary. Confirm current availability through official Cirrus Logic channels or authorized distributors, as older audio ICs may be subject to end-of-life notices or obsolescence. Ensure the 16-pin TSSOP package matches the target PCB footprint requirements.

Audio Amplifiers Selection Notes

Select this component for applications requiring a compact, low-voltage solution for driving headphones directly from a digital audio source. It is suitable for designs where minimizing analog interference is critical due to its direct-to-digital approach. Verify that the supply voltage constraints (1.8 V to 2.4 V) align with the system's power budget and that the I²C control interface is compatible with the host processor.

Audio Amplifiers Part Context

The CS44L11 belongs to Cirrus Logic's line of low-voltage Class-D audio amplifier controllers. It is designed to replace traditional linear headphone amplifiers in portable electronics, offering higher efficiency and reduced heat dissipation. The device simplifies design by combining digital signal processing functions with power amplification in a single small package.

Audio Amplifiers Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.

Audio Amplifiers FAQ

What is the maximum supported sample rate for the CS44L11?

The CS44L11 supports sample rates up to 96 kHz, operating in either single-speed mode (up to 50 kHz) or double-speed mode (up to 100 kHz).

How does the CS44L11 handle output pops during power transitions?

The device features PWM PopGuard technology and programmable ramp controls (Ramp-Up Bypass and Ramp-Down Bypass) to minimize audible artifacts caused by DC-blocking capacitors and bias changes during power-up and power-down.