Datasheet
© 2009 Microchip Technology Inc. DS21881E-page 5
MCP6231/1R/1U/2/4
2.0 TYPICAL PERFORMANCE CURVES
Note: Unless otherwise indicated, T
A
= +25°C, V
DD
= +1.8V to +5.5V, V
SS
= GND, V
CM
= V
DD
/2, V
OUT
≈ V
DD
/2,
R
L
= 100 kΩ to V
DD
/2 and C
L
= 60 pF.
FIGURE 2-1: Input Offset Voltage.
FIGURE 2-2: PSRR, CMRR vs.
Frequency.
FIGURE 2-3: Input Bias Current at +85°C.
FIGURE 2-4: CMRR, PSRR vs. Ambient
Temperature.
FIGURE 2-5: Open-Loop Gain, Phase vs.
Frequency.
FIGURE 2-6: Input Bias Current at
+125°C.
Note: The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
0%
2%
4%
6%
8%
10%
12%
14%
16%
18%
20%
-5
-4
-3
-2
-1
0
1
2
3
4
5
Input Offset Voltage (mV)
Percentage of Occurrences
630 Samples
V
CM
= V
SS
20
30
40
50
60
70
80
90
100
1.E+01 1.E+02 1.E+03 1.E+04 1.E+05
Frequency (Hz)
PSRR, CMRR (dB)
10 1k 10k 100k100
PSRR+
PSRR-
CMRR
0%
2%
4%
6%
8%
10%
12%
14%
16%
18%
20%
0
6
12
18
24
30
36
42
Input Bias Current (pA)
Percentage of Occurrences
630 Samples
V
CM
= V
DD
/2
T
A
= +85°C
70
75
80
85
90
-50 -25 0 25 50 75 100 125
Ambient Temperature (°C)
CMRR, PSRR (dB)
PSRR (V
CM
= V
SS
)
CMRR (V
CM
= -0.3V to +5.3V,
V
DD
= 5.0V)
-20
0
20
40
60
80
100
120
1.E-
01
1.E+
00
1.E+
01
1.E+
02
1.E+
03
1.E+
04
1.E+
05
1.E+
06
1.E+
07Frequency (Hz)
Open-Loop Gain (dB)
-210
-180
-150
-120
-90
-60
-30
0
Open-Loop Phase (°)
R
L
= 10 kΩ
V
CM
= V
DD
/2
0.1 1 10 100 1k 10k 100k 1M 10M
Gain
Phase
0%
5%
10%
15%
20%
25%
30%
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
Input Bias Current (nA)
Percentage of Occurrences
632 Samples
V
CM
= V
DD
/2
T
A
= +125°C