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OPA2681 Datasheet, PDF (7/21 Pages) Burr-Brown (TI) – Dual Wideband, Current Feedback OPERATIONAL AMPLIFIER With Disable | |||
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TYPICAL PERFORMANCE CURVES: VS = ±5V (CONT)
G = +2, RF = 402â¦, RL = 100â¦, unless otherwise noted (see Figure 1).
2ND HARMONIC DISTORTION vs FREQUENCY
â40
VO = 2Vp-p
â50 RL = 100â¦
G = +10, RF = 180â¦
G = +5, RF = 261â¦
â60
â70
G = +2, RF = 402â¦
â80
â90
0.1
1
Frequency (MHz)
10 20
3RD HARMONIC DISTORTION vs FREQUENCY
â40
VO = 2Vp-p
RL = 100â¦
â50
G = +10, RF = 180â¦
â60
G = +5, RF = 261â¦
â70
â80
â90
0.1
1
Frequency (MHz)
G = +2,
RF = 402â¦
10 20
INPUT VOLTAGE AND CURRENT NOISE DENSITY
100
Inverting Input Current Noise
15.1pA/âHz
10
Non-Inverting Input Current Noise 12.2pA/âHz
1
100
Voltage Noise
2.2nV/âHz
1k
10k
100k
1M
10M
Frequency (Hz)
TWO-TONE, 3RD-ORDER
INTERMODULATION SPURIOUS
â40
â45 dBc = dB below carriers
â50
50MHz
â55
â60
â65
â70
20MHz
â75
â80
â85
10MHz
Load Power at Matched 50⦠Load
â90
â8 â6 â4 â2 0 2 4 6 8 10
Single-Tone Load Power (dBm)
60
50
40
30
20
10
0
1
RECOMMENDED RS vs CAPACITIVE LOAD
10
100
Capacitive Load (pF)
FREQUENCY RESPONSE vs CAPACITIVE LOAD
15
12
9
CL = 10pF
6
3
0
CL = 47pF
CL = 22pF
â3 VIN
â6
â9
â12
â15
0
RS
VO
402â¦
CL
1kâ¦
402â¦
1k⦠is optional.
CL = 100pF
150MHz
Frequency (30MHz/div)
300MHz
®
7
OPA2681
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