TYPICAL PERFORMANCE CURVES
At T
A
= +25°C, R
L
= 10kΩ, and V
S
=
±15V,
unless otherwise noted.
OPEN-LOOP GAIN/PHASE vs FREQUENCY
180
160
140
120
A
OL
(dB)
OPEN-LOOP GAIN/PHASE vs FREQUENCY
0
180
160
140
120
Phase (°)
A
OL
(dB)
0
OPA227
G
–20
–40
–60
–80
OPA228
–20
–40
G
–60
Phase (°)
100
80
60
40
20
0
–20
0.01 0.10
1
10
100
1k
φ
100
80
60
40
20
0
–20
0.01 0.10
1
10
100
1k
–80
–100
–120
–140
–160
–180
–200
10k 100k 1M 10M 100M
φ
–100
–120
–140
–160
–180
–200
10k 100k 1M 10M 100M
Frequency (Hz)
Frequency (Hz)
POWER SUPPLY AND COMMON-MODE
REJECTION RATIO vs FREQUENCY
140
120
INPUT VOLTAGE AND CURRENT NOISE
SPECTRAL DENSITY vs FREQUENCY
100k
PSRR, CMRR (dB)
100
80
60
40
-20
–0
0.1
1
10
100
1k
10k
100k
1M
Frequency (Hz)
+PSRR
–PSRR
Voltage Noise (nV/√Hz)
Current Noise (fA/√Hz)
+CMRR
10k
Current Noise
1k
100
10
Voltage Noise
1
0.1
1
10
100
1k
10k
Frequency (Hz)
TOTAL HARMONIC DISTORTION + NOISE
vs FREQUENCY
0.01
V
OUT
= 3.5Vrms
0.01
TOTAL HARMONIC DISTORTION + NOISE
vs FREQUENCY
V
OUT
= 3.5Vrms
OPA227
OPA228
THD+Noise (%)
0.001
THD+Noise (%)
0.001
0.0001
G = 1, R
L
= 10kΩ
0.0001
G = 1, R
L
= 10kΩ
0.00001
20
100
1k
Frequency (Hz)
10k
20k
0.00001
20
100
1k
Frequency (Hz)
10k
50k
OPA227, 2227, 4227
OPA228, 2228, 4228
SBOS110A
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5
TI [ TEXAS INSTRUMENTS ]
