SBAA576A may   2023  – june 2023 ADS54J60

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Interleaving Architecture
  6. 3DC Offset Correction
    1. 3.1 DC Offset Correction Architecture
      1. 3.1.1 Default Configuration
      2. 3.1.2 Bypassing the DC Offset Correction
    2. 3.2 Freezing the DC Offset Correction
    3. 3.3 Effect of Environmental Temperature Fluctuations
    4. 3.4 Effect of Input Frequency on Interleaving Spur
  7. 4External Offset Correction
  8. 5Configuring External DC Offset Correction (Channel A)
    1. 5.1 Device Default Configuration
    2. 5.2 Baseline HSDC Pro Capture
    3. 5.3 Freezing the Interleaving Engine and DC Offset Values
    4. 5.4 Reading the Frozen DC Offset Values
    5. 5.5 Loading the DC Offset Values
    6. 5.6 Confirm HSDC Pro Capture
  9. 6Summary
  10. 7References
  11. 8Revision History

5.2 Baseline HSDC Pro Capture

By default, the DC offset correction block is enabled. This results in reduced interleaving spurs with amplitudes visible above the noise floor.

  • Download the correct firmware to the TSW14J56 capture card (in this example, select ADS54J60_LMF_8224)
  • Take a capture of the noise floor
  • Confirm that the interleaving spurs are in the range of -90 to -85 dBFS
GUID-20230501-SS0I-XBWJ-WF8Z-R75MXJWSRDRS-low.png Figure 5-2 Baseline Capture (Default Offset Correction)