TYPICAL CHARACTERISTICS
At T
A
= +25°C, V
S
=
±15V,
and R
L
= 2kΩ, unless otherwise noted.
OPEN-LOOP GAIN/PHASE
vs FREQUENCY
140
120
100
A
OL
(dB)
POWER SUPPLY AND COMMON-MODE
REJECTION vs FREQUENCY
140
C
L
= 0
C
L
= 1500pF
G
0
–30
Phase (°)
120
–PSR
PSR, CMR (dB)
+PSR
100
80
CMR
60
40
20
0
80
60
40
20
0
–20
0.1
1
φ
–60
–90
–120
–150
–180
10
100
1k
10k
100k
1M
10M
0.1
1
10
100
1k
10k
100k
1M
Frequency (Hz)
Frequency (Hz)
INPUT NOISE AND CURRENT NOISE
SPECTRAL DENSITY vs FREQUENCY
1000
INPUT NOISE VOLTAGE vs TIME
Voltage Noise (nV/√Hz)
Current Noise (fA/√Hz)
Current Noise
100
Noise signal is bandwidth limited to
lie between 0.1Hz and 10Hz.
50nV/div
10
Voltage Noise
1
1
10
100
Frequency (Hz)
1k
10k
1s/div
CHANNEL SEPARATION vs FREQUENCY
140
1
TOTAL HARMONIC DISTORTION + NOISE
vs FREQUENCY
V
OUT
= 3.5Vrms
Channel Separation (dB)
120
THD+Noise (%)
0.1
G = 10, R
L
= 2kΩ, 10kΩ
0.01
G = 1, R
L
= 2kΩ, 10kΩ
0.001
10
100
1k
10k
100k
1M
10
100
1k
Frequency (Hz)
10k
100k
Frequency (Hz)
100
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.
80
60
40
OPA277, OPA2277, OPA4277
SBOS079A
www.ti.com
5
BURR-BROWN [ BURR-BROWN CORPORATION ]
