The A/D Converter (or AD Converter) component is a simple analog to digital converter with a resolution of $N$ bits.

The input voltage is converted to an $N$-vector of type Logic.

The input resistance between positive and negative pin is given by $R_{\mathrm{in}}$.

The input signal range $\left(V_{\mathrm{ref}\,\mathrm{low}}\,V_{\mathrm{ref}\,\mathrm{high}}\right)$ is divided into $2^N-1$ equally spaced stages of length $V_{\mathrm{lsb}}\=\frac{V_{\mathrm{ref}\,\mathrm{high}}-V_{\mathrm{ref}\,\mathrm{low}}}{2^N-1}$.

The output signal is the binary code of $k$ as long as the input voltage takes values in the $k$-th stage, namely in the range from $V_{\mathrm{lsb}}\left(k-\frac{1}{2}\right)$ to $V_{\mathrm{lsb}}\left(k\+\frac{1}{2}\right)$ .

The output only changes its value when the trigger signal $\mathrm{trig}$ of type Logic changes to 1 (forced or weak).

The output vector is little-endian, that is, the first bit, $y_1$, is the least significant.

Dynamic behavior is not modeled; the output changes instantaneously when the trigger signal rises.

The component described in this topic is from the Modelica Standard Library. To view the original documentation, which includes author and copyright information, click here.