MCP651/2/5
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
= 1 kΩ to V
L
, C
L
= 20 pF, and CAL/CS = V
SS
.
2.3
90
Frequency Response
90
Gain Bandwidth Product
(MHz)
PSRR+
PSRR-
PM
70
60
80
CMRR, PSRR (dB)
70
60
50
40
30
20
10
0
100
1.E+2
1k
1.E+3
10k
100k
1.E+4
1.E+5
Frequency (Hz)
1M
1.E+6
CMRR
80
70
V
DD
= 2.5V
V
DD
= 5.5V
50
40
60
50
40
30
-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
GBWP
30
20
10
10M
1.E+7
Common Mode Input Voltage (V)
FIGURE 2-24:
Frequency.
CMRR and PSRR vs.
FIGURE 2-27:
Gain Bandwidth Product
and Phase Margin vs. Common Mode Input
Voltage.
60
Gain Bandwidth Product
(MHz)
Open-Loop Phase (°)
50
V
DD
= 5.5V
6.0
90
80
70
60
50
40
30
Phase Margin (°)
120
Open-Loop Gain (dB)
100
80
60
40
20
0
-20
| A
OL
|
∠A
OL
0
-30
-60
-90
-120
-150
-180
-210
40
30
GBWP
V
DD
= 2.5V
20
PM
10
0
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)
1.E+1 1.E+2 1.E+3 1.E+4
100k
1.E+6
10M 100M
1.E+9
10 100 1k 10k
1.E+5
1M
1.E+7 1.E+8
1G
Frequency (Hz)
FIGURE 2-25:
Frequency.
90
Gain Bandwidth Product
(MHz)
80
70
60
50
40
30
-50
-25
GBWP
PM
Open-Loop Gain vs.
FIGURE 2-28:
Gain Bandwidth Product
and Phase Margin vs. Output Voltage.
Open-Loop Output Impedance (
Ω
)
70
60
V
DD
= 5.5V
V
DD
= 2.5V
1000
50
40
30
20
10
125
Phase Margin (°)
100
G = 101 V/V
G = 11 V/V
G = 1 V/V
10
1
0
25
50
75 100
Ambient Temperature (°C)
0.1
1k
10k
100k
1M
10M
100M
1.0E+03 1.0E+04 1.0E+05 1.0E+06 1.0E+07 1.0E+08
Frequency (Hz)
FIGURE 2-26:
Gain Bandwidth Product
and Phase Margin vs. Ambient Temperature.
FIGURE 2-29:
Closed-Loop Output
Impedance vs. Frequency.
DS22146A-page 12
©
2009 Microchip Technology Inc.
Phase Margin (°)
MICROCHIP [ MICROCHIP TECHNOLOGY ]
