OP27
–Typical Performance Characteristics
10
9
100
90
80
70
60
50
100
10
1
T
V
= 25ꢁC
= ꢄ15V
A
8
7
6
S
741
5
4
I/F CORNER
LOW NOISE
3
I/F CORNER =
2.7Hz
AUDIO OP AMP
OP27
I/F CORNER
I/F CORNER = 2.7Hz
2
TEST TIME OF 10sec FURTHER
LIMITS LOW FREQUENCY
(<0.1Hz) GAIN
INSTRUMENTATION AUDIO RANGE
40
RANGETO DC
TO 20kHz
1
30
0.01
1
10
100
1k
0.1
1
10
100
1
10
100
1k
FREQUENCY – Hz
FREQUENCY – Hz
FREQUENCY – Hz
TPC 1. 0.1 Hz to 10 Hzp-p Noise Tester
Frequency Response
TPC 2. Voltage Noise Density vs.
Frequency
TPC 3. A Comparison of Op Amp
Voltage Noise Spectra
100
10
5
R1
R2
T
V
= 25ꢁC
= ꢄ15V
A
T
V
= 25ꢁC
= ꢄ15V
V
= ꢄ15V
A
S
S
S
R
– 2R1
4
3
2
1
S
AT 10Hz
AT 1kHz
1
10
0.1
AT 10Hz
AT 1kHz
RESISTOR NOISE ONLY
1
100
0.01
100
–50 –25
0
25
50
75
100 125
1k
10k
1k
10k
100k
TEMPERATURE – ꢁC
SOURCE RESISTANCE –ꢅ
BANDWIDTH – Hz
TPC 4. Input Wideband Voltage
Noise vs. Bandwidth (0.1 Hz to
Frequency Indicated)
TPC 5. Total Noise vs. Sourced
Resistance
TPC 6. Voltage Noise Density vs.
Temperature
5
10.0
5.0
4.0
T
= 25ꢁC
A
4
3
2
1
AT 10Hz
AT 1kHz
T
= +125ꢁC
A
1.0
3.0
2.0
1.0
T
= –55ꢁC
A
T
= +25ꢁC
A
I/F CORNER = 140Hz
0.1
10
0
10
20
30
40
5
15
25
35
45
100
1k
10k
TOTAL SUPPLYVOLTAGE –V
TOTAL SUPPLYVOLTAGE (V+ – V–) –V
FREQUENCY – Hz
TPC 7. Voltage Noise Density vs.
Supply Voltage
TPC 8. Current Noise Density vs.
Frequency
TPC 9. Supply Current vs. Supply
Voltage
–8–
REV. A
ADI [ ADI ]
