MCP651/1S/2/3/4/5/9
DS22146C-page 14
2009-2011 Microchip Technology Inc.
Note: Unless otherwise indicated, TA =+25°C, VDD = +2.5V to 5.5V, VSS = GND, VCM =VDD/3, VOUT =VDD/2,
VL =VDD/2, RL =1 kto VL, CL = 20 pF, and CAL/CS =VSS.
2.3
Frequency Response
FIGURE 2-24:
CMRR and PSRR vs.
Frequency.
FIGURE 2-25:
Open-Loop Gain vs.
Frequency.
FIGURE 2-26:
Gain Bandwidth Product
and Phase Margin vs. Ambient Temperature.
FIGURE 2-27:
Gain Bandwidth Product
and Phase Margin vs. Common Mode Input
Voltage.
FIGURE 2-28:
Gain Bandwidth Product
and Phase Margin vs. Output Voltage.
FIGURE 2-29:
Closed-Loop Output
Impedance vs. Frequency.
0
10
20
30
40
50
60
70
80
90
1.E+2
1.E+3
1.E+4
1.E+5
1.E+6
1.E+7
Frequency (Hz)
CM
RR,
PS
RR
(
d
B
)
CMRR
PSRR+
PSRR-
100
1M
10k
10M
100k
1k
-20
0
20
40
60
80
100
120
1.E+1 1.E+2 1.E+3 1.E+4 1.E+5 1.E+6 1.E+7 1.E+8 1.E+9
Frequency (Hz)
Op
en
-L
o
p
Gai
n
(
d
B
)
-210
-180
-150
-120
-90
-60
-30
0
Open
-Lo
o
p
P
h
ase
(
°)
| AOL |
AOL
10
1k
100k
10M
1G
100
10k
1M
100M
30
40
50
60
70
80
90
-50
-25
0
25
50
75
100
125
Ambient Temperature (°C)
G
ain
B
and
w
idt
h
P
ro
d
u
ct
(M
H
z)
10
20
30
40
50
60
70
P
h
ase
Mar
g
in
(°
)
PM
GBWP
VDD = 5.5V
VDD = 2.5V
30
40
50
60
70
80
90
-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)
G
ain
B
a
ndw
id
th
P
rod
uct
(M
H
z)
10
20
30
40
50
60
70
P
h
a
se
M
ar
g
in
(
°)
VDD = 5.5V
PM
VDD = 2.5V
GBWP
0
10
20
30
40
50
60
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
Output Voltage (V)
G
a
in
B
an
d
w
id
th
Pr
odu
ct
(M
H
z)
30
40
50
60
70
80
90
P
h
ase
Mar
g
in
(
°)
VDD = 5.5V
PM
VDD = 2.5V
GBWP
0.1
1
10
100
1000
1.0E+03 1.0E+04 1.0E+05 1.0E+06 1.0E+07 1.0E+08
Frequency (Hz)
1k
1M
10M
100M
O
p
en-
Loop
O
u
tput
Impedance
(
)
10k
100k
G = 101 V/V
G = 11 V/V
G = 1 V/V