Typical Performance Characteristics–
OP270
4
AT 10Hz
NOISE VOLTAGE (100nV/DIV)
VOLTAGE NOISE (nV/
Hz)
5
4
3
1/f CORNER = 5Hz
2
VOLTAGE NOISE (nV/
Hz)
10
9
8
7
6
T
A
= 25 C
V
S
= 15V
5
T
A
= 25 C
0.1Hz TO 10Hz NOISE
3
AT 1kHz
2
1
1
1
10
100
FREQUENCY (Hz)
1k
0
5
15
10
SUPPLY VOLTAGE (V)
20
T
A
= 25 C
V
S
= 15V
TIME (1sec/DIV)
TPC 1. Voltage Noise Density
vs. Frequency
TPC 2. Voltage Noise Density
vs. Supply Voltage
TPC 3. 0.1 Hz to 10 Hz Input
Voltage Noise
10
30
CHANGE IN OFFSET VOLTAGE ( A)
T
A
= 25 C
V
S
= 15V
40
V
S
=
15V
5
T
A
= 25 C
V
S
= 15V
4
CURRENT NOISE (pA/
Hz)
VOLTAGE NOISE (nV/
Hz)
20
10
0
–10
–20
3
1.0
2
1/f CORNER = 200Hz
1
0.1
10
100
1k
FREQUENCY (Hz)
10k
–30
0
25
50
75
–75 –50 –25
TEMPERATURE ( C)
0
100 125
0
1
2
3
TIME (Minutes)
4
5
TPC 4. Current Noise Density
vs. Frequency
TPC 5. Input Offset Voltage vs.
Temperature
TPC 6. Warm-Up Offset Voltage
Drift
7
5
V
S
= 15V
V
CM
= 0V
V
S
= 15V
V
CM
= 0V
7
T
A
= 25 C
V
S
= 15V
INPUT BIAS CURRENT (nA)
5
3
INPUT BIAS CURRENT (nA)
0
25
50
75
100 125
6
INPUT OFFSET CURRENT (nA)
4
6
5
4
2
4
3
1
3
2
–75
–50 –25
0
25
50
75
100 125
0
–75
–50 –25
TEMPERATURE ( C)
TEMPERATURE ( C)
2
–10.0
–5.0
0.0
5.0
10.0
–12.5
–7.5
–2.5
2.5
7.5
12.5
COMMON-MODE VOLTAGE (V)
TPC 7. Input Bias Current vs.
Temperature
TPC 8. Input Offset Current vs.
Temperature
TPC 9. Input Bias Current vs.
Common-Mode Voltage
REV. C
–5–
AD [ ANALOG DEVICES ]
