Datasheet

© 2008 Microchip Technology Inc. DS22041B-page 7
MCP6031/2/3/4
Note: Unless otherwise indicated, T
A
= +25°C, V
DD
= +1.8V to +5.5V, V
SS
= GND, V
CM
= V
DD
/2, V
OUT
≈ V
DD
/2,
V
L
= V
DD
/2, R
L
= 1 MΩ to V
L
, C
L
= 60 pF and CS is tied low.
FIGURE 2-7: Input Noise Voltage Density
vs. Frequency.
FIGURE 2-8: Input Noise Voltage Density
vs. Common Mode Input Voltage.
FIGURE 2-9: Common Mode Rejection
Ratio, Power Supply Rejection Ratio vs.
Frequency.
FIGURE 2-10: Common Mode Rejection
Ratio, Power Supply Rejection Ratio vs. Ambient
Temperature.
FIGURE 2-11: Input Bias, Offset Currents
vs. Ambient Temperature.
FIGURE 2-12: Input Bias Current vs.
Common Mode Input Voltage.
100
1,000
1E-1 1E+0 1E+1 1E+2 1E+3 1E+4 1E+5
Frequency (Hz)
Input Noise Voltage Density
(nV/
√
Hz)
0.1 1 10 100 1k 10k 100k
0
25
50
75
100
125
150
175
200
-0.5
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
Common Mode Input Voltage (V)
Input Noise Voltage Density
(nV/
√
Hz)
f = 1 kHz
V
DD
= 5.5V
0
10
20
30
40
50
60
70
80
90
100
0.1 1 10 100 1000
Frequency (Hz)
CMRR, PSRR (dB)
PSRR-
PSRR+
CMRR
V
DD
= 5.5V
60
65
70
75
80
85
90
95
100
105
110
-50 -25 0 25 50 75 100 125
Ambient Temperature (°C)
PSRR, CMRR (dB)
PSRR (V
DD
= 1.8V to 5.5V, V
CM
= V
SS
)
CMRR (V
DD
= 1.8V,
V
CM
= -0.3V to 2.1V)
CMRR (V
DD
= 5.5V,
V
CM
= -0.3V to 5.8V)
1
10
100
1000
10000
25 45 65 85 105 125
Ambient Temperature (°C)
Input Bias and Offset
Currents (pA)
V
DD
= 5.5V
V
CM
= V
DD
Input Bias Current
In
p
ut Offset Current
10
100
1000
10000
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
Common Mode Input Voltage (V)
Input Bias Current (pA)
T
A
= +125°C
T
A
= +85°C
V
DD
= 5.5V