Datasheet

 2009-2011 Microchip Technology Inc. DS22197B-page 11
MCP631/2/3/4/5/9
Note: Unless otherwise indicated, T
A
=+25°C, V
DD
= +2.5V to 5.5V, V
SS
= GND, V
CM
=V
DD
/3, V
OUT
=V
DD
/2,
V
L
=V
DD
/2, R
L
=2kto V
L
, C
L
= 50 pF and CS =V
SS
.
2.3 Frequency Response
FIGURE 2-21: CMRR and PSRR vs.
Frequency.
FIGURE 2-22: Open-Loop Gain vs.
Frequency.
FIGURE 2-23: Gain Bandwidth Product
and Phase Margin vs. Ambient Temperature.
FIGURE 2-24: Gain Bandwidth Product
and Phase Margin vs. Common Mode Input
Voltage.
FIGURE 2-25: Gain Bandwidth Product
and Phase Margin vs. Output Voltage.
FIGURE 2-26: 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)
CMRR, PSRR (dB)
100 1M10k 10M100k1k
CMRR
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 Gain (dB)
-240
-210
-180
-150
-120
-90
-60
-30
0
Open-Loop Phase (°)
| A
OL
|

A
OL
100 10k
1M
100M
1
1k 100k 10M10
20
22
24
26
28
30
32
34
36
-50 -25 0 25 50 75 100 125
Ambient Temperature (°C)
Gain Bandwidth Product
(MHz)
40
45
50
55
60
65
70
75
80
Phase Margin (°)
PM
GBWP
V
DD
= 5.5V
V
DD
= 2.5V
20
22
24
26
28
30
32
34
36
-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)
Gain Bandwidth Product
(MHz)
40
45
50
55
60
65
70
75
80
Phase Margin (°)
PM
GBWP
V
DD
= 5.5V
V
DD
= 2.5V
20
22
24
26
28
30
32
34
36
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)
Gain Bandwidth Product
(MHz)
40
45
50
55
60
65
70
75
80
Phase Margin (°)
PM
GBWP
V
DD
= 5.5V
V
DD
= 2.5V
0.1
1
10
100
1.0E+04 1.0E+05 1.0E+06 1.0E+07 1.0E+08
Frequency (Hz)
10k 1M 10M 100M
Closed-Loop Output Impedance (Ω
)
100k
G = 101 V/V
G = 11 V/V
G = 1 V/V