MCP3901 Просмотр технического описания (PDF) - Microchip Technology
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MCP3901 Datasheet PDF : 62 Pages
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MCP3901
Note: Unless otherwise indicated, AVDD = 5.0V, DVDD = 5.0V; TA = +25°C, MCLK = 4 MHz; PRESCALE = 1;
OSR = 64; GAIN = 1; Dithering OFF; VIN = -0.5 dBFS @ 60 Hz.
95
90
OSR = 256
85
OSR = 128
80
75
70
OSR = 64
65
60
55
OSR = 32
50
45
40
1
2
4
8
16
32
Gain (V/V)
FIGURE 2-13:
Signal-to-Noise and
Distortion vs. Gain (Dithering On).
14
fIN = 60 Hz
12 MCLK = 4 MHz
OSR = 256
10 Dithering On
8
6
4
2
0
-105.0 -104.5 -104.0 -103.5 -103.0 -102.5 -102.0
Total Harmonic Distortion (dBc)
FIGURE 2-16:
Total Harmonic Distortion
Histogram (Dithering On).
0
-20
-40
-60
Dithering OFF
-80
-100
-120
Dithering ON
32
64
128
256
Oversampling Ratio (OSR)
FIGURE 2-14:
Total Harmonic Distortion
vs. Oversampling Ratio.
0
-20
-40
-60
-80
-100
-120
-50 -25
0 25 50 75 100 125 150
Temperature (ºC)
FIGURE 2-17:
Total Harmonic Distortion
vs. Temperature.
100
80
60 fD = 15.625 ksps
40
20
0
-20
-40
-60
-80
10
SINC filter notch at 15.625 Hz
100
1000
10000
Input Signal Frequency (Hz)
FIGURE 2-15:
Total Harmonic Distortion
vs. Input Signal Frequency.
90
80
70
60
50
40
30
20
10
0
10
fD = 15.625 ksps
SINC filter notch at 15.625 Hz
100
1000
Input Signal Frequency (Hz)
10000
FIGURE 2-18:
Signal-to-Noise and
Distortion vs. Input Frequency.
© 2011 Microchip Technology Inc.
DS22192D-page 11
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