Summary of Counter Type ADC Explained

Summary of "Counter Type ADC Explained"

Storyline

The video provides a detailed explanation of the counter type Analog to Digital Converter (ADC), also known as the digital ramp ADC. It covers the components involved, how the ADC operates, and the implications of its design on conversion time and resolution.

Gameplay Highlights

• Components of Counter Type ADC:
  • Binary Counter
  • Comparator
  • Digital to Analog Converter (DAC)
  • Control Circuit
  • AND Gate
  • Latches
• Operation of the Counter Type ADC:
  • The input voltage is applied to the non-inverting terminal of the comparator.
  • The DAC output is connected to the inverting terminal.
  • The counter starts from a reset state (0) and counts up as clock pulses are applied.
  • The DAC output increases in a staircase fashion, continuously compared with the input voltage.
  • When the DAC output exceeds the input voltage, the counter stops counting, is latched, and reset for the next conversion.

Key Strategies and Tips

• Conversion Time:
  • The conversion time is dependent on the magnitude of the input voltage; larger voltages result in longer conversion times.
  • The worst-case scenario for conversion time is calculated as (2^N - 1) Tclk, where N is the number of bits and Tclk is the clock pulse duration.
• Resolution vs. Conversion Time:
  • The resolution of the ADC is determined by the DAC's resolution (e.g., 8-bit DAC means 8-bit ADC).
  • Increasing resolution can lead to longer conversion times, creating a trade-off.
  • While increasing clock frequency can reduce conversion time, it is limited by the response time of the ADC components.
• Performance Comparison:
  • The Counter Type ADC is slower due to the reset after each conversion.
  • A tracking type ADC, which does not reset, could perform conversions faster by adjusting based on the current position.

Featured Sources

ALL ABOUT ELECTRONICS YouTube Channel

Notable Quotes

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