Datasheet

MCP3909
DS22025C-page 12  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 2-17: Active Power Measurement
Error over V
DD
, Internal V
REF
(G = 16, PF = 1).
FIGURE 2-18: Active Power Measurement
Error over V
DD
, External V
REF
(G = 1, PF = 1).
FIGURE 2-19: Active Power Measurement
Error vs. Input Frequency (G = 16).
FIGURE 2-20: Active Power Measurement
Error with External V
REF
(G = 1, PF = 1).
FIGURE 2-21: Active Power Measurement
Error with External V
REF
(G = 1, PF = 0.5).
FIGURE 2-22: Active Power Measurement
Error with External V
REF
(G = 2, PF = 1).
-0.15
-0.1
-0.05
0
0.05
0.1
0.15
0.2
0.25
0.3
0.0001 0.0010 0.0100 0.1000 1.0000
CH0 Vp-p Amplitude (V)
Measurement Error (%)
V
DD
=4.75V
V
DD
=5.0V
V
DD
=4.5V
V
DD
=5.25V
V
DD
=5.5V
-0.1
-0.05
0
0.05
0.1
0.15
0.2
0.0001 0.0010 0.0100 0.1000 1.0000
CH0 Vp-p Amplitude (V)
Measurement Error (%)
V
DD
=4.5V
V
DD
=4.75V
V
DD
=5.0V
V
DD
=5.25V
V
DD
=5.5V
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
45 50 55 60 65 70 75
Frequency (Hz)
% Error
PF = 0.5
PF = 1
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.0001 0.0010 0.0100 0.1000 1.0000
CH0 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
0.0001 0.0010 0.0100 0.1000 1.0000
CH1 Vp-p Amplitude (V)
Measurement Error (%)
+85°C
+25°C
-40°C
-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
0.0001 0.0010 0.0100 0.1000 1.0000
CH0 Vp-p Amplitude (V)
Measurement Error (%)
+85°C
+25°C
- 40°C