Datasheet

© 2011 Microchip Technology Inc. DS22192D-page 11
MCP3901
Note: Unless otherwise indicated, AV
DD
= 5.0V, DV
DD
= 5.0V; T
A
= +25°C, MCLK = 4 MHz; PRESCALE = 1;
OSR = 64; GAIN = 1; Dithering OFF; V
IN
= -0.5 dBFS @ 60 Hz.
FIGURE 2-13: Signal-to-Noise and
Distortion vs. Gain (Dithering On).
FIGURE 2-14: Total Harmonic Distortion
vs. Oversampling Ratio.
FIGURE 2-15: Total Harmonic Distortion
vs. Input Signal Frequency.
FIGURE 2-16: Total Harmonic Distortion
Histogram (Dithering On).
FIGURE 2-17: Total Harmonic Distortion
vs. Temperature.
FIGURE 2-18: Signal-to-Noise and
Distortion vs. Input Frequency.
40
45
50
55
60
65
70
75
80
85
90
95
12481632
Gain (V/V)
SINAD (dB)
OSR = 256
OSR = 32
OSR = 64
OSR = 128
-120
-100
-80
-60
-40
-20
0
32 64 128 256
Oversampling Ratio (OSR)
Total Harmonic Distortion
(dBc)
Dithering ON
Dithering OFF
-80
-60
-40
-20
0
20
40
60
80
100
10 100 1000 10000
Input Signal Frequency (Hz)
Total Harmonic Distortion
(dBc)
f
D
= 15.625 ksps
SINC filter notch at 15.625 Hz
0
2
4
6
8
10
12
14
-105.0 -104.5 -104.0 -103.5 -103.0 -102.5 -102.0
Total Harmonic Distortion (dBc)
Frequency of Occurance
f
IN
= 60 Hz
MCLK = 4 MHz
OSR = 256
Dithering On
-120
-100
-80
-60
-40
-20
0
-50 -25 0 25 50 75 100 125 150
Temperature (ºC)
Total Harmonic Distortion
(dBc)
0
10
20
30
40
50
60
70
80
90
10 100 1000 10000
Input Signal Frequency (Hz)
SINAD (dB)
f
D
= 15.625 ksps
SINC filter notch at 15.625 Hz