This section contains example configuration scripts for IADC in various operational modes, with sample test results from a TAC5212EVM-K.

These examples are tested with the inputs shown in Figure 2-2.

Figure 2-2 Test Setup for the Examples

Like any typical DC measurement system, the IADC is also subject to offset and gain errors. Hence, the user needs to calibrate these errors with the IADC also part of the system.

Figure 2-3 is a plot of the input voltage against the output of the IADC for each channel.

Figure 2-3 IADC Input vs Output Curve

The input x vs the output y follows a linear trend, with the graph fitting the equation:

To obtain m and c

1. Set an input voltage x₁ (close, but not equal to 0V) and capture the IADC voltage "y₁".
2. Set an input voltage x₂ (close, but not equal to max voltage) and capture the IADC voltage "y₂".
3. Then:
   Equation 4. $\mathrm{m}=\frac{y_2-y_1}{x_2-x_1}$, and
   Equation 5. $\mathrm{c}={\mathrm{y}}_1-m{x}_1$or
   Equation 6. $\mathrm{c}={\mathrm{y}}_2-m{x}_2$.

The calibrated IADC output y_cal for any measured value y can thus be calculated from the equation

For the above graph, the average m and c across channels is 0.794V/V and 0.28V respectively.