TYPICAL CHARACTERISTICS
At T
A
= +25°C,
±V
CC
=
±15VDC,
unless otherwise noted.
INPUT OFFSET VOLTAGE WARM-UP DRIFT
+10
Offset Voltage Change (µV)
10
INPUT VOLTAGE NOISE vs NOISE BANDWIDTH
(0.1Hz to Indicated Frequency)
Voltage Noise (µVrms)
+5
1
0
0.1
R
S
= 0
Ω
–5
–10
0
1
2
3
4
5
6
Time From Power Turn-On (min)
0.01
100
1k
10k
100k
Noise Bandwidth (Hz)
TOTAL INPUT VOLTAGE NOISE SPECTRAL DENSITY
vs SOURCE RESISTANCE
100
80
60
Voltage Noise (nV/√Hz)
VOLTAGE NOISE SPECTRAL DENSITY
vs SUPPLY VOLTAGE
5
R
1
Voltage Noise (nV/√Hz)
40
20
10
8
6
4
2
1
100
R
1
-
+
R
SOURCE
= 2 x R
1
10Hz
1kHz
Resistor Noise Only
4
10Hz
3
1kHz
2
1
1k
Source Resistance (
Ω
)
10k
0
±5
±10
Supply Voltage (V
CC
)
±15
±20
VOLTAGE NOISE SPECTRAL DENSITY
vs TEMPERATURE
5
10Hz
Voltage Noise (nV/√Hz)
INPUT CURRENT NOISE SPECTRAL DENSITY
10
8
6
4
2
500kΩ
1
0.8
0.6
0.4
0.2
I
n =
√(e
n
)
2
– (130nV)
2
o
Current Noise Test Circuit
100kΩ
500kΩ 10kΩ
e
n
DUT
o
4
3
1kHz
Current Noise (pA/√Hz)
1M
Ω
x 100
Warning:
This industry-standard equation
is inaccurate and these figures should
be used for comparison purposes only!
10
100
Frequency (Hz)
1k
10k
2
1
–75
–50
–25
0
+25
+50
+75
+100
+125
Ambient Temperature (°C)
0.1
OPA27, OPA37
SBOS135C
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5
TI [ TEXAS INSTRUMENTS ]
