Question

For an 8-bit counter ramp A/D converter driven by 1000 kHz clock, calculate maximum conversion time.

• A. 1.28 milli seconds
• B. 0.128 milli seconds
• C. 0.256 milli seconds
• D. 2.56 milli seconds

Hint:

For n-bit A/D converter: \( T_{max} = \frac{2^n}{f_{clock}} \)

Answer 1

The Correct Option is C

Max conversion time = \( 2^8 / f = 256 / 1000~kHz = 0.256~ms \)