Data Converters

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Information Converters

All the actual world portions are analog in nature. We will symbolize these portions electrically as analog indicators. An analog sign is a time various sign that has any variety of values (variations) for a given time slot.

In distinction to this, a digital sign varies all of a sudden from one degree to a different degree and could have solely finite variety of values (variations) for a given time slot.

This chapter discusses concerning the kinds of information converters and their specs.

Varieties of Information Converters

The digital circuits, which will be operated with analog indicators are known as as analog circuits. Equally, the digital circuits, which will be operated with digital indicators are known as as digital circuits. An information converter is an digital circuit that converts information of 1 kind to a different.

There are two kinds of information converters −

  • Analog to Digital Converter
  • Digital to Analog Converter

If we need to join the output of an analog circuit as an enter of a digital circuit, then we have now to position an interfacing circuit between them. This interfacing circuit that converts the analog sign into digital sign is known as as Analog to Digital Converter.

Equally, if we need to join the output of a digital circuit as an enter of an analog circuit, then we have now to position an interfacing circuit between them. This interfacing circuit that converts the digital sign into an analog sign is known as as Digital to Analog Converter.

Notice that some Analog to Digital Converters could require Digital to Analog Converter as an inside block for his or her operation.

Specs

The next are the specs which can be associated to information conversions −

  • Decision
  • Conversion Time

Decision

Decision is the minimal quantity of change wanted in an analog enter voltage for it to be represented in binary (digital) output. It is dependent upon the variety of bits which can be used within the digital output.

Mathematically, decision will be represented as

Resolution=12NDecision=12N

the place, ‘N’ is the variety of bits which can be current within the digital output.

From the above components, we will observe that there exists an inverse relationship between the decision and variety of bits. Subsequently, decision decreases because the variety of bits will increase and vice-versa.

Decision will also be outlined because the ratio of most analog enter voltage that may be represented in binary and the equal binary quantity.

Mathematically, decision will be represented as

Resolution=VFS2N1Decision=VFS2N−1

the place,

VFSVFS is the total scale enter voltage or most analog enter voltage,

‘N’ is the variety of bits which can be current within the digital output.

Conversion Time

The period of time required for an information converter in an effort to convert the info (info) of 1 kind into its equal information in different kind is known as as conversion time. Since we have now two kinds of information converters, there are two kinds of conversion occasions as follows

  • Analog to Digital Conversion time
  • Digital to Analog Conversion time

The period of time required for an Analog to Digital Converter (ADC) to transform the analog enter voltage into its equal binary (digital) output is known as as Analog to Digital conversion time. It is dependent upon the variety of bits which can be used within the digital output.

The period of time required for a Digital to Analog Converter (DAC) to transform the binary (digital) enter into its equal analog output voltage is known as as Digital to Analog conversion time. It is dependent upon the variety of bits which can be current within the binary (digital) enter.