TYPICAL PERFORMANCE CURVES
At TA = +25°C, RL = 10kΩ, and VS = ±15V, unless otherwise noted.
OPEN-LOOP GAIN/PHASE vs FREQUENCY
OPA228
OPEN-LOOP GAIN/PHASE vs FREQUENCY
180
160
140
120
100
80
180
0
0
OPA227
160
–20
–20
140
–40
–40
G
120
G
–60
–60
100
–80
–80
φ
80
φ
–100
–120
–140
–160
–180
–200
–100
60
60
–120
40
40
–140
20
20
–160
0
0
–180
–20
–20
–200
0.01 0.10
1
10 100 1k 10k 100k 1M 10M 100M
0.01 0.10
1
10 100 1k 10k 100k 1M 10M 100M
Frequency (Hz)
Frequency (Hz)
POWER SUPPLY AND COMMON-MODE
REJECTION RATIO vs FREQUENCY
INPUT VOLTAGE AND CURRENT NOISE
SPECTRAL DENSITY vs FREQUENCY
140
120
100
80
100k
10k
1k
+CMRR
Current Noise
+PSRR
60
–PSRR
100
10
40
Voltage Noise
-20
–0
1
0.1
1
10
100
1k
10k
100k
1M
0.1
1
10
100
1k
10k
Frequency (Hz)
Frequency (Hz)
TOTAL HARMONIC DISTORTION + NOISE
vs FREQUENCY
TOTAL HARMONIC DISTORTION + NOISE
vs FREQUENCY
0.01
0.001
0.01
0.001
VOUT = 3.5Vrms
OPA227
VOUT = 3.5Vrms
OPA228
0.0001
0.00001
0.0001
0.00001
G = 1, RL = 10kΩ
G = 1, RL = 10kΩ
20
100
1k
10k 20k
20
100
1k
Frequency (Hz)
10k 50k
Frequency (Hz)
OPA227, 2227, 4227
OPA228, 2228, 4228
SBOS110A
5
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