MCP3905/06
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.
0.5
0.4
4000
3500
16384 Samples
Mean = - 1.28 mV
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
PF = 1.0
PF = 0.5
3000
2500
2000
1500
1000
500
0
Std. dev = - 18.1 μV
-0.4
-0.5
45
50
55
60
65
70
75
Frequency (Hz)
Bin (mV)
FIGURE 2-11:
Measurement Error vs.
FIGURE 2-14:
Channel 0 Offset Error
Input Frequency.
3000
(DC Mode, HPF Off), G = 16.
0.3
2500
16384 Samples
Mean = -1.57 mV
0.2
2000
Std. Dev = 52.5 μV
0.1
0
V DD =5.0V
1500
1000
500
0
-0.1
-0.2
-0.3
-0.4
V DD =5.25V
V DD =4.5V
V DD =4.75V
V DD =5.5V
-0.5
0.0001
0.0010
0.0100
0.1000
1.0000
Channel 0 Offset (mV)
CH0 Vp-p Amplitude (V)
FIGURE 2-12:
Channel 0 Offset Error
FIGURE 2-15:
Measurement Error vs. V DD
(DC Mode, HPF off), G = 1.
1200
(G = 16).
0.3
1000
800
16384 Samples
Mean = -1.64 mV
Std. Dev = 17.4 μV
0.25
0.2
0.15
V DD =4.75V
V DD =4.5V
600
0.1
400
200
0
0.05
0
-0.05
-0.1
-0.15
V DD =5.0V
V DD =5.25V
V DD =5.5V
0.0001
0.0010
0.0100
0.1000
1.0000
Channel 0 Offset (mV)
CH0 Vp-p Amplitude (V)
FIGURE 2-13:
Channel 0 Offset Error
FIGURE 2-16:
Measurement Error vs. V DD ,
(DC Mode, HPF off), G = 8.
? 2009 Microchip Technology Inc.
G = 16, External V REF .
DS21948E-page 9
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