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DSPIC30F2011 датащи(PDF) 114 Page - Microchip Technology

номер детали DSPIC30F2011
подробное описание детали  High-Performance, 16-Bit Digital Signal Controllers
PDF  205 Pages
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производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

DSPIC30F2011 датащи(HTML) 114 Page - Microchip Technology

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dsPIC30F2011/2012/3012/3013
DS70139E-page 112
© 2006 Microchip Technology Inc.
16.7
ADC Speeds
The dsPIC30F 12-bit ADC specifications permit a max-
imum of 200 ksps sampling rate. Table 16-1 summa-
rizes the conversion speeds for the dsPIC30F 12-bit
ADC and the required operating conditions.
Figure 16-2 depicts the recommended circuit for the
conversion rates above 200 ksps. The dsPIC30F2011
is shown as an example.
FIGURE 16-2:
ADC VOLTAGE REFERENCE SCHEMATIC
TABLE 16-1:
12-BIT ADC EXTENDED CONVERSION RATES
dsPIC30F 12-bit ADC Conversion Rates
Speed
TAD
Minimum
Sampling
Time Min
Rs Max
VDD
Temperature
Channels Configuration
Up to 200
ksps(1)
334 ns
1 TAD
2.5 k
Ω
4.5V to 5.5V
-40°C to +85°C
Up to 100
ksps
668 ns
1 TAD
2.5 k
Ω
3.0V to 5.5V
-40°C to +125°C
Note 1: External VREF- and VREF+ pins must be used for correct operation. See Figure 16-2 for recommended
circuit.
VREF-VREF+
ADC
ANx
S/H
CHX
VREF-VREF+
ADC
ANx
S/H
CHX
ANx or VREF-
or
AVSS
or
AVDD
VDD
VDD
VDD
C8
1
μF
VDD
C7
0.1
μF
VDD
C6
0.01
μF
AVDD
C5
1
μF
AVDD
C4
0.1
μF
AVDD
C3
0.01
μF
See Note 1:
Note 1: Ensure adequate bypass capacitors are provided on each VDD pin.
1
2
3
4
VSS
6
7
21
20
19
18
VDD
VSS
15
dsPIC30F2011
VDD
R1
10
VDD
R2
10
C2
0.1
μF
C1
0.01
μF



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