MCP3911A0 データシートの表示（PDF） - Microchip Technology
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MCP3911A0 Datasheet PDF : 76 Pages
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MCP3911
Note: Unless otherwise indicated, AVDD = 3.3V, DVDD = 3.3V; TA = +25°C, MCLK = 4 MHz; PRESCALE = 1;
OSR = 256; GAIN = 1; Dithering = Maximum; VIN = -0.5 dBFS at 60 Hz, VREFEXT = 0; CLKEXT = 1, AZ_FREQ = 0;
BOOST = 1X.
120
110
100
90
80
70
60
50
40
30
Dithering = Maximum
20
Dithering = Medium
Dithering = Minimum
10
Dithering = None
0
32 64 128 256 512 1024 2048 4096
Oversampling Ratio (OSR)
FIGURE 2-13:
SINAD vs. OSR.
L
120
110
100
90
80
70
60
50
40
Dithering = Maximum
30
Dithering = Medium
20
Dithering = Minimum
10
Dithering = NoQe
0
32 64 128 256 512 1024 2048 4096
Oversampling Ratio (OSR)
FIGURE 2-14:
SNR vs.OSR.
0
-10
-20 Boost = 0.5x
-30
-40 Boost = 0.66x
-50
-60
-70
Boost = 1x
-80
-90
-100
Boost = 2x
-110
-120
0
5
10
15
20
25
30
MCLK Frequency (MHz)
FIGURE 2-16:
THD vs. MCLK.
120
110
100
90
Boost = 2x
80
70
60 Boost = 0.5x
50
Boost = 1x
40 Boost = 0.66x
30
20
10
0
0
5
10
15
20
25
30
MCLK Frequency (MHz)
FIGURE 2-17:
SINAD vs. MCLK.
140
130
120
110
100
90
80
70
60
50
40
Dithering = Maximum
30
Dithering = Medium
20
Dithering = Minimum
10
Dithering = None
0
32 64 128 256 512 1024 2048 4096
Oversampling Ratio (OSR)
FIGURE 2-15:
SFDR vs. OSR.
120
110
100
90
80
70
60
50 Boost = 0.5x
40 Boost = 0.66x
Boost = 1x
30
20
10
0
0
5
10
15
20
MCLK Frequency (MHz)
Boost = 2x
25
30
FIGURE 2-18:
SNR vs. MCLK.
2012-2013 Microchip Technology Inc.
DS20002286C-page 13
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