Use the CMOS 4016 IC to implement the switching in Figure 11-27, and design the necessary control logic so that each analog input is converted to its digital equivalent in sequence. The ADC is a 10-bit, successive-approximation type using a 50-kHz clock signal, and it requires a 10-μs-duration start pulse to begin each conversion. The digital outputs are to remain stable for 100 μs after the conversion is complete before switching to the next analog input. Choose an appropriate multiplexing clock frequency.

Figure 11-27

Transcribed Image Text:

Analog inputs VAO VA1 VA2 VA3 S VA Start Control circuitry A₁ Ao MOD-4 A/D converter Select address Multiplexing clock Digital outputs A/D clock EOC