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