JAJSOX0B March 2024 – November 2024 ADS127L18
PRODMIX
Integral nonlinearity (INL) error specifies the linearity of the ADC dc transfer function. INL is measured by applying a series of dc test voltages over the ADC input range. INL is the difference between a set of dc test voltages [VIN(N)] to the corresponding set of output voltages [VOUT(N)] computed from the slope and offset transfer function of the ADC. Equation 12 shows the end-point method of calculating INL error.
where:
The INL best-fit method uses a least-squared error (LSE) calculation to determine a new straight line. This line minimizes the root-sum-square of the INL errors above and below the original end-point line.