Consists of the types of ADC converters and why we are using it.

2. WHAT IS ANALOG SIGNAL?

3. WHAT IS DIGITAL SIGNAL?
A digital signal refers to an electrical signal that is converted
into a pattern of bits.

4. DOES BOTH ARE SAME?

6. WHAT TO DO?

7. CAN WE CONVERT ANALOG TO
DIGITAL.

8. HOW CAN WE CONVERT?

9. BERNARD MARSHALL GORDON

11. ADC converter is used for
converting analog signals
to digital.

12. HOW THE PROCESS INVOLVES?

13. WHY TO CONVERT?
In order to manipulate the data using a
microprocessor, we need to convert the
analog signals to the digital signals, so
that the microprocessor will be able to
read, understand and manipulate the
data.

14. IMPORTANT PARAMETERS :
 RESOLUTION
 ACCURACY
 PRECISION

15. RESOLUTION
 Number of bits used for ADC
 Example:
 Consider 8-bit ADC. It has a resolution of 8 bits.
The output pins will be 8.
 Consider 16-bit ADC. It has a resolution of 16 bits.
The output pins will be 16.

16. ACCURACY:
 Closeness to the correct value.
 The digital section will not cause problem of
accuracy for the converter, but analog section
effects the accuracy of the converter.
Analog
Section
Digital
Section
INPUT
OUTPUT

17. PRECISION:
 If same input is provided it provides same output
repeatedly.
 Normally in ADC and DAC precision is good but not
accuracy.

18. TYPES OF ADC:
 INTEGRATING ADC CONVERTER.
A. SINGLE SLOPE ADC CONVERTER.
B. DUAL SLOPE ADC CONVERTER.
 SUCCESSIVE APPROXIMATION ADC
CONVERTER.
 FLASH (OR) PARALLEL ADC CONVERTER.

19. INTEGRATING ADC CONVERTER.
 Indirect method of analog to digital conversion.
Integrator: Counter:
Analog Voltage Proportional Time Digital Output

20. SINGLE SLOPE ADC CONVERTER

21. DUAL SLOPE ADC CONVERTER

22. INTEGRATING AND
DE-INTEGRATING SLOPE:

23. SUCCESSIVE APPROXIMATION ADC
CONVERTER

24. FLASH (OR) PARALLEL ADC
CONVERTER.
7/8 Vref
6/8 Vref
5/8 Vref
4/8 Vref
3/8 Vref
2/8 Vref
1/8 Vref