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The electronic stuffing of the unit hasn’t greatly changed since the times of Platinum eX. Creative put its stake on high-quality PCM1804 analog-to-digital converters from Texas Instruments. These converters, coupled with low-noise operational amplifiers, support the three analog inputs of the unit. The main characteristics of the PCM18704 include:

  • Up to 192kHz sample rate;
  • 24 bit resolution;
  • 112dB dynamic range;
  • 111dB SNR;
  • -102dB THD+N.


PCM1804 ADC from Texas Instruments


PCM1804 ensures low level of harmonic distortion

The scheme above indicates that there is very low level of harmonics when the signal peak is at 1kHz. This testifies to the high quality of the converter.

The characteristics of the digital-to-analog converter (the CS4392 chip from Cirrus Logic) match those of the PCM1804 ADC:

  • Up to 192kHz sample rate;
  • 114dB dynamic range;
  • 100dB THD+N.


The flowchart for Cirrus Logic CS4392 DAC

As you see in the flowchart, CS4392 has circuitry for independent discrete control over the volume, which takes place before digital-to-analog conversion, and the volume can be changed with 1dB increment. It is implemented in practice via a digital level indicator on the front panel of the I/O unit.

 
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