Analog-to-Digital Conversion › lesson 29 of 100 · Intermediate
Explain Integral Nonlinearity
This lesson is part of the Analog-to-Digital Conversion course, and after completing it, you will be able to explain and apply the concept of integral nonlinearity to assess ADC accuracy. Integral nonlinearity is a crucial aspect of ADC performance, and understanding it will help you evaluate and compare different ADCs.
Integral nonlinearity refers to the deviation of an ADC's actual transfer curve from its ideal transfer curve, affecting the accuracy of the digital output.
Consider a 12-bit ADC with a full-scale range of 0 to 5V, where the ideal transfer curve is a straight line. However, due to various factors such as component tolerances and circuit imperfections, the actual transfer curve may deviate from the ideal line, resulting in integral nonlinearity. This deviation can cause errors in the digital output, leading to decreased accuracy.
The integral nonlinearity error is typically measured in terms of the maximum deviation between the actual and ideal transfer curves, usually expressed as a percentage of the full-scale range or in terms of least significant bits (LSBs).
To minimize the effects of integral nonlinearity, ADC manufacturers often employ calibration techniques, such as gain and offset adjustment, to ensure that the actual transfer curve closely matches the ideal curve.
উদাহরণ
- A 10-bit ADC has an integral nonlinearity of 0.5 LSBs.This means that the maximum deviation between the actual and ideal transfer curves is 0.5 LSBs.
- An ADC with a full-scale range of 0 to 10V has an integral nonlinearity of 1%.This means that the maximum deviation between the actual and ideal transfer curves is 1% of the full-scale range, or 0.1V.
- A 12-bit ADC has a gain error of 0.1% and an offset error of 0.2 LSBs.These errors contribute to the overall integral nonlinearity of the ADC.
পূর্ণ কোর্স প্রতিটি পাঠ 5টি প্রশ্ন দিয়ে যাচাই করে, আপনার স্তরের সঙ্গে মানিয়ে নেয় এবং আপনার জায়গা মনে রাখে।