Digital Electronics - Vol 2 | 12. Data Conversion Circuits – D/A and A/D Converters - Part C by Abraham | Learn Smarter
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12. Data Conversion Circuits – D/A and A/D Converters - Part C

This chapter delves into the functional aspects of digital-to-analog (D/A) and analog-to-digital (A/D) converters, defining their operating principles, terminologies, and various types. It explores critical operational terms and dimensions like resolution, quantization error, and coding types, while also detailing specific converter architectures including flash, counter, and sigma-delta converters. An understanding of these concepts is essential for effective signal conversion and data processing in digital electronics.

Sections

  • 12.9

    Data Conversion Circuits – D/a And A/d Converters

    This section provides an overview of the key concepts related to data conversion circuits, specifically detailing the operations of D/A and A/D converters.

    Learning Practice

  • 12.9.11

    Code Width

    Code Width refers to the amount of input voltage change that triggers output transitions in digital-to-analog converters, quantified using the least significant bit (LSB) of full scale.

    Learning Practice

  • 12.10

    A/d Converter Terminology

    This section outlines key terms and concepts related to A/D converters, including operational modes, coding formats, register types, and control lines.

    Learning Practice

  • 12.10.1

    Unipolar Mode Operation

    Unipolar Mode Operation refers to an analog-to-digital converter (A/D converter) configuration where the input voltage varies from zero to a full-scale voltage of one polarity.

    Learning Practice

  • 12.10.2

    Bipolar Mode Operation

    Bipolar mode operation allows an A/D converter to handle both positive and negative input voltage signals, expanding its application in electronic devices.

    Learning Practice

  • 12.10.3

    Coding

    Coding refers to the output data format of A/D converters, encompassing various common formats.

    Learning Practice

  • 12.10.4

    Low Byte And High Byte

    This section explains the concept of low byte and high byte outputs in A/D converters, focusing on their significance in interfacing with eight-bit microprocessors.

    Learning Practice

  • 12.10.5

    Right-Justified Data, Left-Justified Data

    This section describes the two formatting styles for data output from an A/D converter: right-justified and left-justified data, particularly focusing on their application for bit sets shorter than eight bits.

    Learning Practice

  • 12.10.6

    Command Register, Status Register

    The command register allows users to set various operational modes of the ADC, while the status register provides signals indicating the conversion status.

    Learning Practice

  • 12.10.7

    Control Lines

    Control lines are essential digital input/output pins that manage and monitor the operation of A/D converters.

    Learning Practice

  • 12.11

    Types Of A/d Converter

    This section discusses different types of analogue-to-digital converters based on their conversion methodologies, including flash, half-flash, counter-type, tracking, successive approximation, single-slope, dual-slope, multislope, and sigma-delta converters.

    Learning Practice

  • 12.11.1

    Simultaneous Or Flash A/d Converters

    The section discusses simultaneous or flash A/D converters, emphasizing their speed and the use of multiple comparators for conversion.

    Learning Practice

  • 12.11.2

    Half-Flash A/d Converter

    The Half-Flash A/D Converter reduces the number of required comparators in a traditional flash converter, enabling high-speed conversions with improved efficiency.

    Learning Practice

  • 12.11.3

    Counter-Type A/d Converter

    The counter-type A/D converter utilizes a single comparator and variable reference voltage to achieve high-resolution conversions, but it requires more time than some alternatives.

    Learning Practice

  • 12.11.4

    Tracking-Type A/d Converter

    The tracking-type A/D converter improves conversion speed by utilizing an UP/DOWN counter that tracks the output of a D/A converter.

    Learning Practice

  • 12.11.5

    Successive Approximation Type A/d Converter

    The successive approximation type A/D converter is designed to quickly digitize analog signals by approximating the value bit by bit.

    Learning Practice

  • 12.11.6

    Single-, Dual- And Multislope A/d Converters

    This section covers the three types of A/D converters: single-slope, dual-slope, and multislope converters, explaining their functionalities and applications.

    Learning Practice

  • 12.11.7

    Sigma-Delta A/d Converter

    The Sigma-Delta A/D Converter utilizes oversampling and delta modulation to enhance signal-to-noise ratio and improve resolution.

    Learning Practice

References

chapter 12 part C.pdf

Class Notes

Memorization

What we have learnt

  • The code width reflects the...
  • A/D converters operate in u...
  • Quantization error and full...

Final Test

Revision Tests