SLAAED2A June   2023  – November 2023 TLV320ADC3120 , TLV320ADC3140 , TLV320ADC5120 , TLV320ADC5140 , TLV320ADC6120 , TLV320ADC6140

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2SNR Enhancement by Summation of ADCs
  6. 3Alternative Method to Summation
  7. 4Practical Results
  8. 5Summary
  9. 6References
  10. 7Revision History

Abstract

In this application note, channel summation, a simple but powerful method to increase the dynamic range and SNR of audio ADCs is discussed. This application note demonstrates how the dynamic performance of ADC increase by a factor of 3 dB for every doubling of the number of converters used in parallel.

The channel-summation feature is available in TLV320ADC6140, TLV320ADC5140, TLV320ADC3140, TLV320ADC6120, TLV320ADC5120 and TLV320ADC3120 audio ADCs. Practical results from TLV320ADC6140 are obtained and used to demonstrate this channel summation method in-depth.