Datasheet

© 2009 Microchip Technology Inc. DS21948E-page 9
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.
FIGURE 2-11: Measurement Error vs.
Input Frequency.
FIGURE 2-12: Channel 0 Offset Error
(DC Mode, HPF off), G = 1.
FIGURE 2-13: Channel 0 Offset Error
(DC Mode, HPF off), G = 8.
FIGURE 2-14: Channel 0 Offset Error
(DC Mode, HPF Off), G = 16.
FIGURE 2-15: Measurement Error vs. V
DD
(G = 16).
FIGURE 2-16: Measurement Error vs. V
DD
,
G = 16, External V
REF
.
-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 = 1.0
PF = 0.5
0
500
1000
1500
2000
2500
3000
-1.75 -1.70 -1.65 -1.61 -1.56 -1.52 -1.47 -1.43 -1.38
Channel 0 Offset (mV)
Occurance
16384 Samples
Mean = -1.57 mV
Std. Dev = 52.5 µV
0
200
400
600
800
1000
1200
-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)
Occurance
16384 Samples
Mean = -1.64 mV
Std. Dev = 17.4 µV
0
500
1000
1500
2000
2500
3000
3500
4000
-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)
Occurance
16384 Samples
Mean = - 1.28 mV
Std. dev = - 18.1 µV
-0.5
-0.4
-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
V
DD
=4.75V
V
DD
=5.0V
V
DD
=4.5V
V
DD
=5.25V
V
DD
=5.5V
-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
=4.5V
V
DD
=4.75V
V
DD
=5.0V
V
DD
=5.25V
V
DD
=5.5V