TYPICAL CHARACTERISTICS
At TA = +25°C, VS = ±15V, and RL = 2kΩ, unless otherwise noted.
POWER SUPPLY AND COMMON-MODE
REJECTION vs FREQUENCY
OPEN-LOOP GAIN/PHASE
vs FREQUENCY
140
140
120
100
80
G
CL = 0
CL = 1500pF
120
0
+PSR
–PSR
100
–30
–60
–90
–120
–150
–180
80
φ
60
40
20
0
CMR
60
40
20
–20
0
0.1
1
10
100
1k
10k
100k
1M
0.1
1
10
100
1k
10k 100k
1M
10M
Frequency (Hz)
Frequency (Hz)
INPUT NOISE AND CURRENT NOISE
SPECTRAL DENSITY vs FREQUENCY
INPUT NOISE VOLTAGE vs TIME
1000
100
10
Noise signal is bandwidth limited to
lie between 0.1Hz and 10Hz.
Current Noise
Voltage Noise
1
1
10
100
1k
10k
1s/div
Frequency (Hz)
TOTAL HARMONIC DISTORTION + NOISE
vs FREQUENCY
CHANNEL SEPARATION vs FREQUENCY
140
120
100
80
1
0.1
VOUT = 3.5Vrms
Dual and quad devices. G = 1,
all channels. Quad measured
channel A to D or B to C—other
combinations yield similar or
improved rejection.
G = 10, RL = 2kΩ, 10kΩ
G = 1, RL = 2kΩ, 10kΩ
0.01
0.001
60
40
10
100
1k
10k
100k
1M
10
100
1k
10k
100k
Frequency (Hz)
Frequency (Hz)
OPA277, OPA2277, OPA4277
SBOS079A
5
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