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OPA2691ID Datasheet, PDF (7/30 Pages) Texas Instruments – Dual Wideband, Current-Feedback OPERATIONAL AMPLIFIER With Disable | |||
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TYPICAL CHARACTERISTICS: VS = ±5V (Cont.)
G = +2, RF = 402â¦, RL = 100â¦, unless otherwise noted (see Figure 1 for AC performance only).
INPUT VOLTAGE AND CURRENT NOISE DENSITY
100
10
1
100
Inverting Input Current Noise (15pA/âHz)
Noninverting Input Current Noise (12pA/âHz)
Voltage Noise (1.7nV/âHz)
1k
10k
100k
1M
10M
Frequency (Hz)
2-TONE, 3RD-ORDER
INTERMODULATION SPURIOUS
â30
dBc = dB below carriers
50MHz
â40
20MHz
â50
10MHz
â60
â70
â80
Load Power at Matched 50⦠Load
â90
â8 â6 â4 â2 0 2 4 6 8 10
Single-Tone Load Power (dBm)
70
60
50
40
30
20
10
0
1
RECOMMENDED RS vs CAPACITIVE LOAD
10
100
1k
Capacitive Load (pF)
FREQUENCY RESPONSE vs CAPACITIVE LOAD
9
6
CL = 10pF
3
CL = 22pF
0
VIN
â3
1/2
RS
VO
OPA2691
CL = 47pF
â6
â9
0
402â¦
CL
1kâ¦
402â¦
1k⦠is optional.
CL = 100pF
125MHz
Frequency (25MHz/div)
250MHz
LARGE-SIGNAL DISABLE/ENABLE RESPONSE
6.0
4.0
VDIS
2.0
0
2.0
1.6
Output Voltage
1.2
0.8
0.4
VIN = +1V
0
Time (200ns/div)
DISABLED FEEDTHROUGH vs FREQUENCY
â45
â50
VDIS = 0
â55
â60
â65
â70
â75
â80 Reverse
â85
â90
Forward
â95
â100
0.3
1
10
100
Frequency (MHz)
OPA2691
7
SBOS224D
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