In this video, the working of Flash (Parallel) type ADC and Half-Flash ADC is explained.
By watching this video, you will learn the following topics:
0:27 Flash ADC Working
7:07 Flash ADC Advantages and Disadvantages
8:26 Half-flash ADC working
The Flash ADC:
The Flash ADC (also known as parallel ADC) is fastest among all ADCs.
The Flash ADC consists of
1) High-speed Comparator
2) Resistive Voltage Divider Network
3) Encoder Circuit
In this video, the working of 3-bit Flash ADC is explained.
Advantages of Flash ADC:
It is fastest among all other ADCs and it is suitable for large bandwidth applications ( e.g Satellite Communication, High-Speed Data Acquisition for Oscilloscope, etc)
Disadvantages:
1) High Power Consumption
2) Large Die Size
3) High Cost
4) Limited Resolution
5) High Accuracy of the Components (Resistors and Comparators)
Half-Flash ADC:
In applications where low power consumption and small die area is main criteria (for the same resolution with relatively good conversion speed) then Half-Flash ADC can be used.
For N-bit Conversion, this Half-Flash ADC requires two (N/2) bit Flash ADC and one (N/2) bit DAC.
In this video, the working of 8-bit Half-flash ADC is explained.
The link to the other useful videos related to ADC and DAC:
1) Introduction to ADC and DAC
• Introduction to ADC and DAC
2) Dual Slope ADC
• Analog to Digital Converter: Single S...
3) R-2R ladder DAC
• R-2R Ladder DAC Explained (with Solve...
4) Counter Type ADC
• Counter Type ADC Explained
5) Tracking Type ADC
• Analog to Digital Converter: Tracking...
6) Successive Approximation ADC
• Successive Approximation ADC Explained
This video will be helpful to all the students of science and engineering in understanding the working of Flash ADC and Half-Flash ADC.
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