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© 2007 Microchip Technology Inc.DS70225B-page 16-1

ADC

16

Section 16. Analog-to-Digital Converter (ADC)

HIGHLIGHTS

This section of the manual contains the following major topics:

16.1Introduction.................................................................................................................. 16-2

16.2Control Registers.........................................................................................................16-4

16.3A/D Terminology and Conversion Sequence.............................................................16-14

16.4ADC Module Configuration........................................................................................16-16

16.5Selecting the Voltage Reference Source...................................................................16-16

16.6Selecting the A/D Conversion Clock..........................................................................16-17

16.7Selecting Analog Inputs for Sampling........................................................................16-18

16.8Enabling the Module..................................................................................................16-20

16.9Specifying Sample/Conversion Control......................................................................16-20

16.10 How to Start Sampling...............................................................................................16-21

16.11How to Stop Sampling and Start Conversions...........................................................16-22

16.12Controlling Sample/Conversion Operation.................................................................16-32

16.13Specifying Conversion Results Buffering...................................................................16-33

16.14 Conversion Sequence Examples...............................................................................16-37

16.15A/D Sampling Requirements......................................................................................16-55

16.16Reading the ADC Result Buffer.................................................................................16-56

16.17 Transfer Function (10-bit Mode).................................................................................16-58

16.18 Transfer Function (12-bit Mode).................................................................................16-59

16.19 ADC Accuracy/Error...................................................................................................16-60

16.20Connection Considerations........................................................................................16-60

16.21 Code Examples..........................................................................................................16-60

16.22Operation During Sleep and Idle Modes....................................................................16-67

16.23Effects of a Reset.......................................................................................................16-68

16.24Special Function Registers Associated with the ADC................................................16-68

16.25 Design Tips................................................................................................................16-70

16.26Related Application Notes..........................................................................................16-71

16.27 Revision History.........................................................................................................16-72

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