An eight-bit D/A converter has a step size of 20 mV. The full-scale output voltage in this case would be

The full-scale output voltage (Vfs) of a Digital to Analog Converter (D/A converter) can be calculated using the formula:

Vfs = (2^n - 1) * Step Size

where n is the number of bits.

In this case, the D/A converter is 8-bit and the step size is 20 mV.

So, substituting the given values into the formula:

Vfs = (2^8 - 1) * 20 mV Vfs = (256 - 1) * 20 mV Vfs = 255 * 20 mV Vfs = 5100 mV or 5.1 V

So, the full-scale output voltage in this case would be 5.1 V.