Datasheet

© 2012 Microchip Technology Inc. DS22286A-page 15
MCP3911
Note: Unless otherwise indicated, AV
DD
= 3.3V, DV
DD
= 3.3V; T
A
= 25°C, MCLK = 4 MHz; PRESCALE = 1;
OSR = 256; GAIN = 1; Dithering = Maximum; V
IN
= -0.5 dBFS @ 60 Hz, VREFEXT = 0; CLKEXT = 1,
AZ_FREQ = 0; BOOST = 1X.
FIGURE 2-25: SNR vs. Input Signal
Amplitude.
FIGURE 2-26: SFDR vs. Input Signal
Amplitude.
FIGURE 2-27: THD vs. Temperature.
FIGURE 2-28: SINAD vs. Temperature.
FIGURE 2-29: SNR vs. Temperature.
FIGURE 2-30: SFDR vs. Temperature.
30
40
50
60
70
80
90
100
110
120
to Noise Ratio (dB)
Channel 0
Channel 1
0
10
20
30
-6 -5 -4 -3 -2 -1 0 1 2 3
Signal
Input Signal Amplitude (dBFS)
30
40
50
60
70
80
90
100
110
120
s
Free Dyanmic Raneg
(dBFS)
Channel 0
Channel 1
0
10
20
30
-6 -5 -4 -3 -2 -1 0 1 2 3
Spuriou
s
Input Signal Amplitude (dBFS)
-120
-110
-100
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
-50 -25 0 25 50 75 100 125 150
Total Harominc Distortion
(dBc)
Temperature (°C)
G=32
G=16
G=8
G=4
G=2
G=1
0
10
20
30
40
50
60
70
80
90
100
-50 -25 0 25 50 75 100 125 150
Signal to Noise and Distortion
Ration (dB)
Temperature (°C)
G=32
G=16
G=8
G=4
G=2
G=1
0
10
20
30
40
50
60
70
80
90
100
-50 -25 0 25 50 75 100 125 150
Signal to Noise Ratio (dB)
Temperature (°C)
G=32
G=16
G=8
G=4
G=2
G=1
0
10
20
30
40
50
60
70
80
90
100
110
120
-50 -25 0 25 50 75 100 125 150
Spurious Free Dynamic Range
(dBFS)
Temperature (°C)
G=32
G=16
G=8
G=4
G=2
G=1