Datasheet

MCP6V31/1U
DS25127A-page 12 © 2012 Microchip Technology Inc.
Note: Unless otherwise indicated, T
A
=+25°C, V
DD
= +1.8V to 5.5V, V
SS
= GND, V
CM
=V
DD
/3, V
OUT
=V
DD
/2,
V
L
=V
DD
/2, R
L
=100kΩ to V
L
and C
L
= 20 pF.
2.3 Frequency Response
FIGURE 2-25: CMRR and PSRR vs.
Frequency.
FIGURE 2-26: Open-Loop Gain vs.
Frequency with V
DD
=1.8V.
FIGURE 2-27: Open-Loop Gain vs.
Frequency with V
DD
=5.5V.
FIGURE 2-28: Gain Bandwidth Product
and Phase Margin vs. Ambient Temperature.
FIGURE 2-29: Gain Bandwidth Product
and Phase Margin vs. Common Mode Input
Voltage.
FIGURE 2-30: Gain Bandwidth Product
and Phase Margin vs. Output Voltage.
50
60
70
80
90
100
110
R
R, PSRR (dB)
CMRR
10
20
30
40
1.E+01 1.E+02 1.E+03 1.E+04 1.E+05
CM
R
Frequency (Hz)
CMRR
PSRR
10 10k
100
100k1k
180
-150
-120
-90
-60
-30
0
10
20
30
40
50
60
70
n
-Loop Phase (°)
n
-Loop Gain (dB)

A
OL
V
DD
= 1.8V
C
L
= 20 pF
-270
-240
-210
-
180
-20
-10
0
10
1.E+03 1.E+04 1.E+05 1.E+06
Ope
n
Ope
n
Frequency (Hz)
1k 10k 1M100k
| A
OL
|
180
-150
-120
-90
-60
-30
0
10
20
30
40
50
60
70
n
-Loop Phase (°)
n
-Loop Gain (dB)
| A
O
L
|

A
OL
V
DD
= 5.5V
C
L
= 20 pF
-270
-240
-210
-
180
-20
-10
0
10
1.E+03 1.E+04 1.E+05 1.E+06
Ope
n
Ope
n
Frequency (Hz)
1k 10k 1M100k
60
70
80
90
100
300
400
500
600
700
h
ase Margin (°)
d
width Product (kHz)
V
DD
= 5.5V
PM
30
40
50
0
100
200
-50 -25 0 25 50 75 100 125
P
h
Gain Ban
d
Ambient Temperature (°C)
GBWP
V
DD
= 1.8V
60
70
80
90
100
300
400
500
600
700
h
ase Margin (°)
dwidth Product (kHz)
V
DD
= 5.5V
PM
R
F
= 1 M
30
40
50
0
100
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
P
h
Gain Ban
Common Mode Input Voltage (V)
GBWP
V
DD
= 1.8V
60
70
80
90
100
300
400
500
600
700
h
ase Margin (°)
dwidth Product (kHz)
V
DD
= 5.5V
PM
30
40
50
0
100
200
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
P
h
Gain Ban
Output Voltage (V)
GBWP
V
DD
= 1.8V