2008 Microchip Technology Inc.
DS22041B-page 7
MCP6031/2/3/4
Note: Unless otherwise indicated, T
A = +25°C, VDD = +1.8V to +5.5V, VSS = GND, VCM = VDD/2, VOUT ≈ VDD/2,
VL = VDD/2, RL = 1 MΩ to VL, CL = 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)
In
put
Nois
eVol
ta
g
e
D
ensity
(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)
In
pu
tNo
is
eV
o
lt
ag
eD
ens
it
y
(nV/
√Hz
)
f = 1 kHz
VDD = 5.5V
0
10
20
30
40
50
60
70
80
90
100
0.1
1
10
100
1000
Frequency (Hz)
CMR
R
,P
S
R
(dB)
PSRR-
PSRR+
CMRR
VDD = 5.5V
60
65
70
75
80
85
90
95
100
105
110
-50
-25
0
25
50
75
100
125
Ambient Temperature (°C)
PSR
R,
C
M
RR
(
d
B)
PSRR (VDD = 1.8V to 5.5V, VCM = VSS)
CMRR (VDD = 1.8V,
VCM = -0.3V to 2.1V)
CMRR (VDD = 5.5V,
VCM = -0.3V to 5.8V)
1
10
100
1000
10000
25
45
65
85
105
125
Ambient Temperature (°C)
Input
B
ia
s
a
nd
O
ff
s
et
C
u
rre
n
ts
(pA
)
VDD = 5.5V
VCM = VDD
Input Bias Current
Input 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)
Inpu
tB
ia
sC
u
rren
t(p
A)
TA = +125°C
TA = +85°C
VDD = 5.5V