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© 2010-2013 Microchip Technology Inc.DS70621C-page 16-1

Analog-to-Digital

Converter (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.........................................................................................................16-6

16.3Overview of Sample and Conversion Sequence.......................................................16-17

16.4ADC Configuration.....................................................................................................16-28

16.5ADC Interrupt Generation..........................................................................................16-35

16.6Analog Input Selection for Conversion.......................................................................16-37

16.7Specifying Conversion Results Buffering for Devices with DMA and with ADC DMA Enable

Bit (ADDMAEN) Set...................................................................................................16-52

16.8ADC Configuration Example......................................................................................16-56

16.9ADC Configuration for 1.1 Msps................................................................................16-57

16.10 Sample and Conversion Sequence Examples for Devices without DMA and for Devices

with DMA but with ADC DMA Enable Bit (ADDMAEN) Clear....................................16-59

16.11Sample and Conversion Sequence Examples for Devices with DMA and with ADDMAEN

Bit Set........................................................................................................................16-71

16.12 Configuration Examples for Devices with Internal Op Amps .....................................16-81

16.13 Analog-to-Digital Sampling Requirements.................................................................16-84

16.14 Reading the ADC Result Buffer.................................................................................16-85

16.15 Transfer Functions.....................................................................................................16-87

16.16 ADC Accuracy/Error...................................................................................................16-89

16.17 Connection Considerations........................................................................................16-89

16.18 Operation During Sleep and Idle Modes....................................................................16-89

16.19 Effects of a Reset.......................................................................................................16-90

16.20 Design Tips................................................................................................................16-91

16.21 Related Application Notes..........................................................................................16-92

16.22 Revision History.........................................................................................................16-93

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