MCP621/1S/2/3/4/5/9
DS22188C-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 =2 kΩ to VL, CL = 50 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.
10
20
30
40
50
60
70
80
90
100
1.E+2
1.E+3
1.E+4
1.E+5
1.E+6
1.E+7
Frequency (Hz)
CM
RR
,P
S
R
(d
B)
CMRR
100
1M
10k
10M
100k
1k
PSRR+
PSRR-
-20
0
20
40
60
80
100
120
140
1.E+0 1.E+1 1.E+2 1.E+3 1.E+4 1.E+5 1.E+6 1.E+7 1.E+8
Frequency (Hz)
Open-
Loop
Ga
in
(d
B
)
-240
-210
-180
-150
-120
-90
-60
-30
0
Open-
Loo
p
P
h
ase
(
°)
| AOL |
∠A
OL
10
1k
100k
10M
1
100
10k
1M
100M
15
20
25
30
35
40
45
-50
-25
0
255075
100
125
Ambient Temperature (°C)
Ga
in
B
a
nd
wi
dt
h
P
roduct
(M
Hz
)
40
45
50
55
60
65
70
P
h
as
e
M
a
rgi
n
(
°)
PM
GBWP
VDD = 5.5V
VDD = 2.5V
15
20
25
30
35
40
45
-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)
Gai
n
B
andwi
d
th
P
roduct
(M
Hz
)
40
45
50
55
60
65
70
P
h
ase
M
argi
n
(°)
PM
GBWP
VDD = 5.5V
VDD = 2.5V
15
20
25
30
35
40
45
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)
Gai
n
B
a
ndwi
d
th
P
rod
uct
(M
H
z)
40
45
50
55
60
65
70
P
h
ase
M
a
rgi
n
(°
)
PM
GBWP
VDD = 5.5V
VDD = 2.5V
0.1
1
10
100
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
-L
oo
p
O
u
tp
ut
Im
pe
da
nc
e(
)
10k
100k
G = 101 V/V
G = 11 V/V
G = 1 V/V