GENERAL DESCRIPTION

The CS42L55 is a highly integrated, 24-bit, ultra-low power stereo CODEC based on multi-bit delta-sigma modulation. Both the ADC and DAC offer many features suitable for low power portable system applications.

DIGITAL to ANALOG FEATURES

♦ 5 mW Stereo Playback Power Consumption

♦ 99 dB Dynamic Range (A-wtd)

♦ -86 dB THD+N

♦ Digital Signal Processing Engine

– Bass & Treble Tone Control, De-Emphasis

– Master Volume Control (+12 to -102 dB in 0.5 dB steps)

– Soft-Ramp & Zero-Cross Transitions

– Programmable Peak-Detect and Limiter

– Beep Generator w/Full Tone Control

ANALOG to DIGITAL FEATURES

♦ 3.5 mW Stereo Record Power Consumption

♦ 95 dB Dynamic Range (A-wtd)

♦ -87 dB THD+N

♦ 2:1 Stereo Input MUX

♦ Analog Programmable Gain Amplifier (PGA) (+12 to -6 dB in 0.5 dB steps)

♦ +20 dB Boost

♦ Programmable Automatic Level Control (ALC)

– Noise Gate for Noise Suppression

– Programmable Threshold & Attack/Release Rates

♦ Independent ADC Channel Control

♦ Digital Vol. Ctl. (0 to -96 dB in 1 dB steps)

♦ High-Pass Filter Disable for DC Measurements

♦ Pseudo Differential Inputs

Stereo Headphone and Line Amplifiers

♦ Step-Down/Inverting Charge Pump

♦ Class H Amplifier - Automatic Supply Adj.

– High Efficiency

– Low EMI

♦ Pseudo-Differential Ground-Centered Outputs

♦ High HP Power Output at -75 dB THD+N

– 2 x 20 mW Into 32 Ω @1.8 V

– 2 x 20 mW Into 16 Ω @1.8 V

♦ 1 VRMS Line Output @1.8 V

♦ Analog Vol. Ctl. (+12 to -55 dB in 1 dB steps)

♦ Analog In to Analog Out Passthrough

♦ Pop and Click Suppression

APPLICATIONS

♦ HDD & Flash-Based Portable Audio Players

♦ MD Players/Recorders

♦ PDAs

♦ Personal Media Players

♦ Portable Game Consoles

♦ Digital Voice Recorders

♦ Digital Camcorders

♦ Digital Cameras

♦ Smart Phones