Datasheet

dsPIC30F2010
DS70118J-page 114 © 2011 Microchip Technology Inc.
18.7 A/D Conversion Speeds
The dsPIC30F 10-bit ADC specifications permit a max-
imum 1 Msps sampling rate. Table 18-1 summarizes
the conversion speeds for the dsPIC30F 10-bit ADC
and the required operating conditions.
The configuration guidelines give the required setup
values for the conversion speeds above 500 ksps,
since they require external V
REF pins usage and there
are some differences in the configuration procedure.
Configuration details that are not critical to the
conversion speed have been omitted.
Figure 18-2 depicts the recommended circuit for the
conversion rates above 500 ksps.
FIGURE 18-2: ADC VOLTAGE
REFERENCE SCHEMATIC
VSS
VDD
VREF-
V
REF+
AV
DD
AVSS
VSS
dsPIC30F2010
VDD
VDD
VDD
VDD
R2
10
C2
0.1 μF
C1
0.01 μF
R1
10
C8
1 μF
VDD
C5
1 μF
VDD
VDD