1. Analog-to-Digital Converters
Lecture L10.5
Lab 11

2. Analog-to-Digital Converters
Converts analog signals to digital signals
8-bit: 0 – 255
10-bit: 0 – 1023
12-bit: 0 – 4095
Successive Approximation
Flash

3. Method of Successive Approximation

4. Implementing Successive Approximation

5. ADC0831 8-Bit Serial I/O A/D Converter

9. ADC0831 Timing

10. Voltmeter Logic
Block Diagram

12. Flash A/D Converter
Uses analog comparators to convert an analog signal to a digital signal in a single clock cycle
n-bit converter requires 2n – 1 comparators
4-bit converter requires 15 comparators
8-bit converter requires 255 comparators
Or two 4-bit converters plus a D/A converter

13. MAX118

14. Flash A/D Converter

15. MAX118