Datasheet

MCP3909
DS22025C-page 14  2006-2012 Microchip Technology Inc.
Note: Unless otherwise specified, DV
DD
, AV
DD
= 5V; A
GND
, D
GND
= 0V; V
REF
= Internal, HPF = 1 (AC mode),
MCLK = 3.58 MHz, CH1 input = 660 mV
P-P
at 50 Hz, CH0 amplitude sweeps at 50 Hz.
FIGURE 2-29: Signal-to-Noise and
Distortion Ratio vs. Input Signal Amplitude
(G = 2).
FIGURE 2-30: Signal-to-Noise and
Distortion Ratio vs. Input Signal Amplitude
(G = 8).
FIGURE 2-31: Signal-to-Noise and
Distortion Ratio vs. Input Signal Amplitude
(G = 16).
FIGURE 2-32: Frequency Spectrum,
50 Hz Input Signal.
0
10
20
30
40
50
60
70
80
90
100
0.000100 0.001000 0.010000 0.100000 1.000000
CH0 Vp-p Amplitude (V)
SINAD (dBFS)
0
10
20
30
40
50
60
70
80
90
100
SINAD (dB)
SINAD (dBFS)
SINAD (dB)
0
10
20
30
40
50
60
70
80
90
100
0.00001 0.0001 0.001 0.01 0.1
CH0 Vp-p Amplitude (V)
SINAD (dBFS)
0
10
20
30
40
50
60
70
80
90
100
SINAD (dB)
SINAD (dB)
SINAD (dBFS)
0
10
20
30
40
50
60
70
80
90
100
0.000010 0.000100 0.001000 0.010000 0.100000
CH0 Vp-p Amplitude (V)
SINAD (dBFS)
0
10
20
30
40
50
60
70
80
90
100
SINAD (dB)
SINAD (dBFS)
SINAD (dB)
-160
-140
-120
-100
-80
-60
-40
-20
0
0 2000 4000 6000
Frequency (Hz)
Amplitude (dB)