Datasheet

 2006-2012 Microchip Technology Inc. DS22025C-page 13
MCP3909
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 2-23: Active Power Measurement
Error with External V
REF
(G = 2, PF = 0.5).
FIGURE 2-24: Active Power Measurement
Error with External V
REF
(G = 8, PF = 1).
FIGURE 2-25: Active Power Measurement
Error with External V
REF
(G = 8, PF = 0.5).
FIGURE 2-26: Active Power Measurement
Error with External V
REF
(G = 16, PF = 1).
FIGURE 2-27: Active Power Measurement
Error with External V
REF
(G =16, PF = 0.5).
FIGURE 2-28: Signal-to-Noise and
Distortion Ratio vs. Input Signal Amplitude
(G = 1).
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
0.0001 0.0010 0.0100 0.1000 1.0000
CH1 Vp-p Amplitude (V)
Measurement Error (%)
+85°C
+25°C
-40°C
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
0.0000 0.0001 0.0010 0.0100 0.1000
CH1 Vp-p Amplitude (V)
Measurement Error (%)
+85°C
+25°C
-40°C
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
0.0000 0.0001 0.0010 0.0100 0.1000
CH1 Vp-p Amplitude (V)
Measurement Error (%)
+85°C
+25°C
-40°C
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
0.0000 0.0001 0.0010 0.0100 0.1000
CH1 Vp-p Amplitude (V)
Measurement Error (%)
+85°C
+25°C
- 40°C
-1
-0.8
-0.6
-0.4
-0.2
0
0.2
0.4
0.6
0.8
1
0.0000 0.0001 0.0010 0.0100 0.1000
CH1 Vp-p Amplitude (V)
Measurement Error (%)
+85°C
+25°C -40°C
0
10
20
30
40
50
60
70
80
90
100
0.0001 0.0010 0.0100 0.1000 1.0000
CH0 Vp-p Amplitude (V)
SINAD (dBFS)
0
10
20
30
40
50
60
70
80
90
100
SINAD (dB)
SINAD (dBFS)
SINAD(dB)