Описание
The CS42L56 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.The CS42L56 includes a stereo ADC, stereo DAC, and stereo headphone driver. The analog input path includes independent channel control of a variety of features including a Programmable Gain Amplifier, digital volume control with soft ramp transitions, and an analog pass-through mode for low power operation. It also includes an analog input mux and mic bias generation for supporting a variety of analog audio inputs. The DAC output includes a DSP engine with parametric EQ, volume control, limiting functions, and a beep generator. The Class H stereo headphone amplifier combines the efficiency of an integrated step-down and inverting charge pump with the linearity and low EMI of a Class AB amplifier. The output is ground centered, eliminating the need for large DC blocking capacitors.The CS42L56 is available in a 40-pin QFN package for the Commercial (-40 to +85° C) grade. The CDB42L56 Customer Demonstration board is also available for device evaluation and implementation suggestions.
- 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
- Stereo Headphone and Line Amplifiers
- Step-down/Inverting Charge Pump
- Class H Amplifier – Automatic Supply Adjustment: High Efficiency and Low EMI
- Pseudo-differential Ground-centered Outputs
- High HP Power Output at -75 dB THD+N: 2 x 20 mW Into 16 ? @ 1.8 V
- 1 VRMS Line Output @ 1.8 V
- Analog Voltage Control (+12 to -60 dB in 1 dB steps)
- Analog In to Analog Out Pass through
- Pop and Click Suppression
- ANALOG to DIGITAL FEATURES
- 3.5 mW Stereo Record Power Consumption
- 95 dB Dynamic Range (A-wtd)
- -87 dB THD+N
- Configurable Analog Inputs: Two Pseudo-differential Stereo Inputs /One Pseudo-differential Stereo Inputs + One Standard Stereo Input + One Standard Mono Input; Three Standard Stereo Inputs; Pseudo-differential Inputs Reduce Common Mode Signal Noise; 3:1 Stereo Input MUX for ADC or Pass through
- Analog Programmable Gain Amplifier (PGA): +12 to -6 dB in 0.5 dB steps; +10 dB or +20 dB Additional Gain for Microphone Inputs
- Programmable, Low-noise MIC Bias Output
- Programmable Automatic Level Control (ALC): Noise Gate for Noise Suppression; Programmable Threshold & Attack/Release Rates
- Independent ADC Channel Control
- High-pass Filter Disable for DC Measurements
