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
0.3
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
-0.5
45
4000
3500
3000
2500
2000
1500
1000
500
0
% Error
PF = 1.0
Occurance
PF = 0.5
16384 Samples
Mean = - 1.28 mV
Std. dev = - 18.1 µV
50
55
60
65
70
75
Frequency (Hz)
FIGURE 2-11:
Input Frequency.
3000
Measurement Error vs.
FIGURE 2-14:
Channel 0 Offset Error
(DC Mode, HPF Off), G = 16.
0.3
Measurement Error
2500
Occurance
2000
1500
1000
500
0
16384 Samples
Mean = -1.57 mV
Std. Dev = 52.5 µV
0.2
0.1
0
-0.1
-0.2
-0.3
-0.4
V
DD
=5.5V
V
DD
=5.25V
V
DD
=4.5V
V
DD
=4.75V
V
DD
=5.0V
-1.75
-1.70
-1.65
-1.61
-1.56
-1.52
-1.47
-1.43
-1.38
-0.5
0.0001
Channel 0 Offset (mV)
FIGURE 2-12:
Channel 0 Offset Error
(DC Mode, HPF off), G = 1.
1200
FIGURE 2-15:
(G = 16).
0.3
0.25
Measurement Error
0.2
0.15
0.1
0.05
0
-0.05
-0.1
-0.15
0.0001
V
DD
=5.0V
1000
Occurance
800
600
400
200
0
16384 Samples
Mean = -1.64 mV
Std. Dev = 17.4 µV
-1.71
-1.69
-1.68
-1.67
-1.66
-1.65
-1.64
-1.63
-1.62
-1.60
-1.59
Channel 0 Offset (mV)
FIGURE 2-13:
Channel 0 Offset Error
(DC Mode, HPF off), G = 8.
FIGURE 2-16:
Measurement Error vs. V
DD
,
G = 16, External V
REF
.
©
2007 Microchip Technology Inc.
-1.38E-03
-1.37E-03
-1.36E-03
-1.35E-03
-1.34E-03
-1.33E-03
-1.32E-03
-1.31E-03
-1.30E-03
-1.29E-03
-1.28E-03
-1.27E-03
-1.26E-03
-1.25E-03
-1.24E-03
-1.23E-03
-1.22E-03
Bin (mV)
0.0010
0.0100
0.1000
1.0000
CH0 Vp-p Amplitude (V)
Measurement Error vs. V
DD
V
DD
=4.75V
V
DD
=4.5V
V
DD
=5.25V
V
DD
=5.5V
0.0010
0.0100
0.1000
1.0000
CH0 Vp-p Amplitude (V)
DS21948D-page 7