Inside the ADC0808 Which functional blocks are integrated on a typical ADC0808 IC?

Introduction / Context:
The ADC0808 is a classic 8-bit successive-approximation ADC that simplifies multi-channel data acquisition by integrating selection logic and the converter core in one package. Recognizing its internal blocks helps with pinout understanding and system integration.

Given Data / Assumptions:

• ADC0808 provides multiple analog input channels.
• It uses internal addressing (select lines) to choose the active channel.
• It includes the SAR ADC engine.

Concept / Approach:

The ADC0808 integrates: (1) an 8-channel analog multiplexer for inputs, (2) an 8-bit SAR ADC core, and (3) a 3-bit address (select) input to choose any one of the eight channels. Thus, all listed items are present in the device, enabling compact DAQ designs.

Step-by-Step Solution:

Verification / Alternative check:

Standard datasheets and training materials for the ADC0808/ADC0809 families clearly list these blocks and show the channel select truth table.

Why Other Options Are Wrong:

• Each individual block (A, B, C) is correct but incomplete; the device contains all of them.

Common Pitfalls:

• Forgetting that channel selection requires digital address lines; external decoders are not needed.

Final Answer:

All of the above