TYPICAL PERFORMANCE CURVES
At TA = +25°C, VS = +5V, and RL = 10kΩ connected to VS/2, unless otherwise noted.
OPEN-LOOP GAIN/PHASE vs FREQUENCY
OPEN-LOOP GAIN/PHASE vs FREQUENCY
120
100
80
60
40
20
0
120
100
80
60
40
20
0
0
0
30
30
OPA344
OPA345
Phase
Phase
60
60
90
90
120
150
180
120
150
180
Gain
1k
Gain
100
0.1
1
10
1k
10k 100k
1M
10M
0.1
1
10
100
10k 100k
1M
10M
Frequency (Hz)
Frequency (Hz)
POWER SUPPLY AND COMMON-MODE
REJECTION RATIO vs FREQUENCY
MAXIMUM OUTPUT VOLTAGE vs FREQUENCY
VS = +5.5V
100
80
60
40
20
10
6
5
4
3
2
1
0
+PSRR
VS
=
CMRR
+5V
–PSRR
OPA344
OPA345
VS = +2.7V
10
100
1k
10k
100k
100k
1M
10M
Frequency (Hz)
Frequency (Hz)
VOLTAGE AND CURRENT NOISE
SPECTRAL DENSITY vs FREQUENCY
CHANNEL SEPARATION vs FREQUENCY
140
120
100
80
10000
1000
100
100
IN
10
1
VN
Dual and quad devices.
G = 1, all channels.
Quad measured channel
A to D or B to C—other
combinations yield improved
rejection.
10
0.1
60
1
10
100
1k
10k
100k
1M
10M
100
1k
10k
100k
1M
Frequency (Hz)
Frequency (Hz)
®
OPA344, 2344, 4344
OPA345, 2345, 4345
5
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