CTSD Precision ADCs – Part 3: Inherent Alias Rejection Made Possible

CTSD Precision ADCs - Part 3: Inherent Alias Rejection Made Possible

In Part 3 of our CTSD precision ADCs article series, we will highlight the alias free nature of CTSD ADCs, which improves the immunity to interferers without any added peripheral design. Part 1 showcased a new class of easy to use, alias free precision ADCs based on continuous-time sigma-delta (CTSD) architecture that offers simple, compact signal chain solutions. Part 2 demystified the CTSD technology for signal chain designers. This article compares the design complexity behind alias rejection solutions for currently available precision ADC architectures. We will illustrate a theory to explain the inherent alias rejection of the CTSD ADC architecture. We also showcase how signal chain design can be simplified and discuss the extended advantages of CTSD ADCs. Finally, we will introduce new measurement and performance parameters to quantify alias rejection.

View the full version of 'CTSD Precision ADCs - Part 3: Inherent Alias Rejection Made Possible,' on the Analog.com website.