Datasheet

OPA27, OPA37
5
SBOS135C
www.ti.com
TYPICAL CHARACTERISTICS
At T
A
= +25°C, ±V
CC
= ±15VDC, unless otherwise noted.
INPUT OFFSET VOLTAGE WARM-UP DRIFT
Time From Power Turn-On (min)
0
+10
+5
0
–5
–10
Offset Voltage Change (µV)
123456
INPUT VOLTAGE NOISE vs NOISE BANDWIDTH
(0.1Hz to Indicated Frequency)
Noise Bandwidth (Hz)
100 1k 10k 100k
10
1
0.1
0.01
Voltage Noise (µVrms)
R = 0
S
Ω
TOTAL INPUT VOLTAGE NOISE SPECTRAL DENSITY
vs SOURCE RESISTANCE
Source Resistance ( )Ω
100 1k 10k
100
80
60
10
8
6
40
20
4
2
1
Voltage Noise (nV/√Hz)
-
+
R
1
R
1
R = 2 R
1
x
SOURCE
Resistor Noise Only
1kHz
10Hz
VOLTAGE NOISE SPECTRAL DENSITY
vs SUPPLY VOLTAGE
5
4
3
2
1
0
Supply Voltage (V )
CC
±5 ±10 ±15 ±20
Voltage Noise (nV/√Hz)
1kHz
10Hz
Voltage Noise (nV/√Hz)
VOLTAGE NOISE SPECTRAL DENSITY
vs TEMPERATURE
5
4
3
2
1
–75 –50 –25 0 +25 +50 +75 +100 +125
Ambient Temperature (°C)
10Hz
1kHz
INPUT CURRENT NOISE SPECTRAL DENSITY
Current Noise (pA/√Hz)
10
8
6
4
2
1
0.8
0.6
0.4
0.2
0.1
10 100 1k 10k
This industry-standard equation
is inaccurate and these figures should
be used for comparison purposes only!
Current Noise Test Circuit
I
n
=
√(e
n
o
)
2
– (130nV)
2
1M 100
Ω x
DUT
100kΩ
500kΩ
500kΩ
10kΩ
e
n
o
Frequency (Hz)
Warning: