Audio Codec 1ADC / 1DAC 24-Bit 36-Pin QFN T/R

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.The analog input path allows independent channel control of a variety of features. The Programmable Gain Amplifier (PGA) provides analog gain with zero cross transitions. The ADC path includes a digital volume attenuator with soft ramp transitions and a programmable ALC and noise gate monitor the input signals and adjust the volume appropriately. An analog passthrough also exists, accommodating a lower noise, lower power analog in to analog out path to the headphone and line amplifiers, bypassing the ADC and DAC.

• High Performance 24-bit Converters
  • Multi-bit Delta Sigma Architecture
• Integrated High Efficient Power Management Reduces Power Consumption
  • Step-Down Charge Pump Improves Efficiency
  • Inverting Charge Pump Accommodates Low System Voltage by Providing Negative Rail for HP/Line Amp
  • LDO Reg. Provides Low Digital Supply Voltage
• Digital Power Reduction
  • Very Low Oversampling Rate for Converters
  • Bursted Serial Clock Providing 24 Bits per Sample
• Power Down Management
  • ADC, DAC, CODEC, PGA, DSP
• Analog & Digital Routing/Mixes
  • Line/Headphone Out = Analog In (ADC Bypassed)
  • Line/Headphone Out = ADC Out
  • Internal Digital Loopback
  • Mono Mixes
• I²C® Control Port
• I²S Digital Interface Format