Experiment 22: Monitoring ADC Sampling Signals

Objective: Monitor and evaluate the sampling behavior of an ADC (Analog-to-Digital Converter) to understand its functionality.

Background:

Analog-to-Digital Converters (ADCs) are crucial for transforming analog signals into digital form for processing in microcontrollers and other digital systems. Understanding the sampling process, including rate, resolution, and accuracy, is essential for effective ADC utilization.

Steps:

  1. Setup:
    • Identify the ADC's input range and resolution.
    • Connect an appropriate analog signal source (e.g., a function generator or sensor output) to the ADC input.
    • Ensure proper grounding and stable power supply to the ADC circuit.
  2. Signal Monitoring:
    • Attach a logic analyzer to the digital output lines of the ADC.
    • Configure the logic analyzer software for capturing and decoding ADC output.
  3. Data Capture and Analysis:
    • Apply various analog input signals, such as sine, square, or ramp waveforms, to the ADC.
    • Record the digitized output and verify it against expected results based on the input signal.
    • Evaluate the sampling rate, resolution, and accuracy of the ADC.

Expected Outcome:

Gain an understanding of how an ADC samples and converts analog signals, and learn to evaluate its performance in terms of resolution, accuracy, and speed.