Datasheet

OPA277, OPA2277, OPA4277
5
SBOS079A
www.ti.com
TYPICAL CHARACTERISTICS
At T
A
= +25°C, V
S
= ±15V, and R
L
= 2kΩ, 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 DISTORTION + NOISE
vs FREQUENCY
V
OUT
= 3.5Vrms
G = 10, R
L
= 2kΩ, 10kΩ
G = 1, R
L
= 2kΩ, 10kΩ
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.