SBAA590 june   2023 ADC12DJ5200RF , ADC32RF52 , ADC32RF54 , ADC32RF55 , ADC34RF52 , ADC34RF55

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Achieving Accuracy Through Calibration
    1. 2.1 Temperature Variations
    2. 2.2 External Noise
    3. 2.3 Unstable Power Supply
    4. 2.4 Mechanical Stress
    5. 2.5 Manufacturing Variations
    6. 2.6 Avoiding Errors
  6. 3Calibration Techniques
    1. 3.1 One-Time Calibration
    2. 3.2 Foreground Calibration
    3. 3.3 Background Calibration
  7. 4Summary
  8. 5References

Abstract

In modern highly-integrated digital systems for data acquisition, high-speed analog-to-digital converters (ADCs) play a major role in transforming signals into their digital representation. As ADCs are a vital component of the overall system signal chain of wireless communications, electronic warfare, radar systems, medical imaging, and other applications, they must perform effectively to maintain a high spurious-free dynamic range (SFDR), establishing a distinguishable signal from noise. Therefore, ADC calibration is of utmost importance to improving SFDR by reducing noise and enhancing signal distinguishability. Specifically, calibration reduces errors, consequently allowing for SFDR improvement. This application note discusses different approaches for ADC calibration commonly found in most modern converters, including one-time calibration, background calibration, and foreground calibration.