OP27–Typical Performance Characteristics
100
90
VOLTAGE NOISE – nV/ Hz
80
GAIN – dB
5
4
3
I/F CORNER = 2.7Hz
70
60
50
40
30
0.01
TEST TIME OF 10sec FURTHER
LIMITS LOW FREQUENCY
(<0.1Hz) GAIN
VOLTAGE NOISE – nV/ Hz
10
9
8
7
6
100
T
A
= 25 C
V
S
= 15V
741
2
I/F CORNER
10 I/F CORNER =
LOW NOISE
2.7Hz
AUDIO OP AMP
OP27
I/F CORNER
INSTRUMENTATION AUDIO RANGE
RANGE TO DC
TO 20kHz
1
1
1
10
100
FREQUENCY – Hz
1k
0.1
1
10
FREQUENCY – Hz
100
1
10
100
FREQUENCY – Hz
1k
TPC 1. 0.1 Hz to 10 Hz
p-p
Noise Tester
Frequency Response
TPC 2. Voltage Noise Density vs.
Frequency
TPC 3. A Comparison of Op Amp
Voltage Noise Spectra
10
T
A
= 25 C
V
S
= 15V
100
T
A
= 25 C
V
S
= 15V
R1
R2
R
S
– 2R1
5
V
S
=
15V
V
VOLTAGE NOISE – nV/ Hz
TOTAL NOISE – nV/ Hz
RMS VOLTAGE NOISE –
4
AT 10Hz
1
10
3
AT 1kHz
0.1
AT 10Hz
AT 1kHz
RESISTOR NOISE ONLY
2
0.01
100
1k
10k
BANDWIDTH – Hz
100k
1
100
1k
SOURCE RESISTANCE –
10k
1
–50
–25
0
25
50
75
TEMPERATURE – C
100
125
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
T
A
= 25 C
10.0
5.0
CURRENT NOISE – pA/ Hz
VOLTAGE NOISE – nV/ Hz
4
AT 10Hz
AT 1kHz
3
SUPPLY CURRENT – mA
4.0
T
A
= +125 C
3.0
T
A
= –55 C
2.0
T
A
= +25 C
1.0
2
I/F CORNER = 140Hz
1
0.1
10
0
10
20
30
40
1.0
100
1k
FREQUENCY – Hz
10k
5
TOTAL SUPPLY VOLTAGE (V+ – V–) – V
15
25
35
TOTAL SUPPLY VOLTAGE – V
45
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
AD [ ANALOG DEVICES ]
