DSPIC30F5013 Microchip Technology Inc., DSPIC30F5013 Datasheet - Page 131

• Manufacturer Part Number: DSPIC30F5013
• Description: Dspic30f5011/5013 High-performance Digital Signal Controllers
• Manufacturer: Microchip Technology Inc.

19.0
The 12-bit Analog-to-Digital converter allows conver-
sion of an analog input signal to a 12-bit digital number.
This module is based on a Successive Approximation
Register (SAR) architecture and provides a maximum
sampling rate of 200 ksps. The ADC module has up to
16 analog inputs which are multiplexed into a sample
and hold amplifier. The output of the sample and hold
is the input into the converter which generates the
result. The analog reference voltage is software select-
able to either the device supply voltage (AV
the voltage level on the (V
has a unique feature of being able to operate while the
device is in Sleep mode with RC oscillator selection.
FIGURE 19-1:
© 2006 Microchip Technology Inc.
Note: This data sheet summarizes features of this group
of dsPIC30F devices and is not intended to be a complete
reference source. For more information on the CPU,
peripherals, register descriptions and general device
functionality, refer to the “dsPIC30F Family Reference
Manual” (DS70046).
AN10
AN11
AN12
AN13
AN14
AN15
12-BIT ANALOG-TO-DIGITAL
CONVERTER (ADC) MODULE
AN0
AN1
AN2
AN3
AN4
AN5
AN6
AN7
AN8
AN9
V
V
REF
REF
+
-
12-BIT ADC FUNCTIONAL BLOCK DIAGRAM
REF
+/V
REF
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
V
AN1
-) pin. The ADC
REF
AV
AV
DD
SS
-
DD
/AV
SS
) or
S/H
Sample
CH0
The ADC module has six 16-bit registers:
• ADC Control Register 1 (ADCON1)
• ADC Control Register 2 (ADCON2)
• ADC Control Register 3 (ADCON3)
• ADC Input Select Register (ADCHS)
• ADC Port Configuration Register (ADPCFG)
• ADC Input Scan Selection Register (ADCSSL)
The ADCON1, ADCON2 and ADCON3 registers
control the operation of the ADC module. The ADCHS
register selects the input channels to be converted. The
ADPCFG register configures the port pins as analog
inputs or as digital I/O. The ADCSSL register selects
inputs for scanning.
The block diagram of the 12-bit ADC module is shown
in Figure 19-1.
Note:
dsPIC30F5011/5013
Switches
12-bit SAR
DAC
Input
The SSRC<2:0>, ASAM, SMPI<3:0>,
BUFM and ALTS bits, as well as the
ADCON3 and ADCSSL registers, must
not be written to while ADON = 1. This
would lead to indeterminate results.
16-word, 12-bit
Sample/Sequence
Dual Port
RAM
Conversion Logic
Comparator
Control
Input MUX
Control
DS70116F-page 129