TYPICAL PERFORMANCE CURVES
(CONT)
At T
A
= +25°C, R
L
=10kΩ, and V
S
=
±15V,
unless otherwise noted.
INPUT NOISE VOLTAGE vs TIME
140
CHANNEL SEPARATION vs FREQUENCY
Channel Separation (dB)
120
50nV/div
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.
10
100
1k
10k
100k
1M
60
40
1s/div
Frequency (Hz)
VOLTAGE NOISE DISTRIBUTION (10Hz)
24
OFFSET VOLTAGE PRODUCTION DISTRIBUTION
17.5
15.0
Percent of Amplifiers (%)
Typical distribution
of packaged units.
Percent of Units (%)
16
12.5
10.0
5.5
5.0
2.5
8
0
0
3.16 3.25 3.34 3.43
3.51 3.60
3.69 3.78
0
–150
–135
–120
–105
–90
–75
–60
–45
–30
–15
0
15
30
45
60
75
90
105
120
135
150
Noise (nV/√Hz)
Offset Voltage (µV)
OFFSET VOLTAGE DRIFT PRODUCTION DISTRIBUTION
12
Typical distribution
of packaged units.
WARM-UP OFFSET VOLTAGE DRIFT
10
8
Offset Voltage Change (µV)
Percent of Amplifiers (%)
6
4
2
0
–2
–4
–6
–8
8
4
0
0
0.5
1.0
1.5
–10
0
50
100
150
200
250
300
Time from Power Supply Turn-On (s)
Offset Voltage Drift (µV)/°C
6
OPA227, 2227, 4227
OPA228, 2228, 4228
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SBOS110A
TI [ TEXAS INSTRUMENTS ]
