TYPICAL PERFORMANCE CURVES (CONT)
At TA = +25°C, RL =10kΩ, and VS = ±15V, unless otherwise noted.
INPUT NOISE VOLTAGE vs TIME
140
CHANNEL SEPARATION vs FREQUENCY
120
100
80
Dual and quad devices. G = 1, all channels.
Quad measured Channel A to D, or B to C;
other combinations yield similiar or improved
rejection.
60
40
10
100
1k
10k
100k
1M
1s/div
Frequency (Hz)
VOLTAGE NOISE DISTRIBUTION (10Hz)
OFFSET VOLTAGE PRODUCTION DISTRIBUTION
24
16
8
17.5
15.0
12.5
10.0
5.5
Typical distribution
of packaged units.
5.0
2.5
0
0
0
3.16 3.25 3.34 3.43 3.51 3.60 3.69 3.78
Noise (nV/√Hz)
Offset Voltage (µV)
OFFSET VOLTAGE DRIFT PRODUCTION DISTRIBUTION
WARM-UP OFFSET VOLTAGE DRIFT
12
8
10
8
Typical distribution
of packaged units.
6
4
2
0
–2
–4
–6
–8
–10
4
0
0
50
100
150
200
250
300
0
0.5
1.0
1.5
Time from Power Supply Turn-On (s)
Offset Voltage Drift (µV)/°C
OPA227, 2227, 4227
OPA228, 2228, 4228
6
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SBOS110A
TI [ TEXAS INSTRUMENTS ]
