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© 2014-2019 Microchip Technology Inc. DS70005213G-page 1
12-Bit High-Speed, Multiple SARs A/D Converter (ADC)
HIGHLIGHTS
This section of the manual contains the following major topics:
1.0 Introduction ....................................................................................................................... 2
2.0 Registers........................................................................................................................... 5
3.0 Register Map..................................................................................................................... 7
4.0 Conversion Sequence..................................................................................................... 41
5.0 ADC Operation................................................................................................................ 41
6.0 Application Examples...................................................................................................... 60
7.0 Operation During Power-Saving Modes ......................................................................... 71
8.0 Effects of Reset............................................................................................................... 71
9.0 Related Application Notes............................................................................................... 72
10.0 Revision History .............................................................................................................. 73
dsPIC33/PIC24 Family Reference Manual
DS70005213G-page 2  2014-2019 Microchip Technology Inc.
1.0 INTRODUCTION
The dsPIC33/PIC24 12-Bit High-Speed, Multiple SARs Analog-to-Digital Converter (ADC)
includes the following features:
• Multiple ADC Cores:
- Multiple single channel dedicated ADC cores (depending on the specific device
implementation)
- One shared (common) ADC core
• Configurable 6, 8, 10 or 12-Bit Resolution for each ADC Core
• Up to 3.25 Msps Conversion Rate per Channel for 12-Bit Resolution
• Up to 32 Analog Input Sources (depending on the specific device implementation)
• Single-Ended or Pseudodifferential Inputs on a per Channel Basis for All Channels
• Conversion Result can be Formatted as Unsigned or Signed Data on a per Channel Basis
for All Channels
• Separate 16-Bit Conversion Result Register for each Analog Input
• Early Interrupt Generation to enable Fast Processing of Converted Data
• Multiple Integrated Digital Comparators (depending on the specific device implementation):
- Multiple comparison options
- Assignable to specific analog inputs
• Multiple Oversampling Filters (depending on the specific device implementation):
- Provides increased resolution
- Assignable to a specific analog input
• Operation during CPU Sleep and Idle modes
Simplified block diagrams of the Multiple SARs 12-Bit ADC are illustrated in Figure 1-1,
Figure 1-2 and Figure 1-3.
The module consists of a few independent SAR ADC cores. The analog inputs (channels) are
connected through multiplexers and switches to the Sample-and-Hold (S/H) circuit of each ADC
core. The core uses the channel information (output format, Measurement mode and input
number) to process the analog sample. When conversion is complete, the result is stored in the
result buffer for the specific analog input, and passed to the digital filter and digital comparator if
they were configured to use data from this particular channel.
Note: This family reference manual section is meant to serve as a complement to device
data sheets. Depending on the device variant, this manual section may not apply to
all dsPIC33/PIC24 devices. Please consult the note at the beginning of the chapter
in the specific device data sheet to check whether this document supports the
device you are using.
Device data sheets and family reference manual sections are available for
download from the Microchip Worldwide Website at: http://www.microchip.com.
 2014-2019 Microchip Technology Inc. DS70005213G-page 3
12-Bit High-Speed, Multiple SARs A/D Converter (ADC)
Figure 1-1: 12-Bit High-Speed, Multiple SARs ADC Block Diagram
Dedicated ADC
Core 0
Reference Voltage Selection
(1)
(REFSEL[2:0] bits)
Clock Source Selection(1)
(CLKSEL[1:0] bits)
Clock Source Divider
(CLKDIV[5:0] bits)
Reference
Reference
Reference
Output Data
Clock
Clock
Clock
Output Data
Output Data
Digital Comparator 0 ADCMP0Interrupt
Digital Comparator x ADCMPxInterrupt
Digital Filter 0
Digital Filter x
ADFL0DAT
ADFLxDAT
ADCBUF0
ADCBUF1
ADCBUFx
ADCAN0Interrupt
ADCAN1Interrupt
ADCANxInterrupt
ADFL0Interrupt
ADFLxInterrupt
Dedicated ADC
Core 1
Shared ADC Core
Analog
Inputs
Analog
Inputs
Analog
Inputs
(See Figure 1-2)
(See Figure 1-3)
(See Figure 1-2)
Note 1: Options are device-specific. Refer to the device data sheet for more information.

Product specificaties

Merk: Microchip
Categorie: Niet gecategoriseerd
Model: dsPIC33CK64MP105

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