Your question is ADC/DAC Selection and Linearity. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Tell me about how you choose ADC/DAC components and explain linearity and staircase waveform behavior.
Keep your answer focused on selection criteria, the meaning of linearity, and why sampled outputs look like a staircase. If helpful, compare tradeoffs such as resolution, sampling rate, noise, and distortion.