OPA3681 Datasheet, PDF (7/21 Pages) Burr-Brown (TI) – Triple Wideband, Current-Feedback OPERATIONAL AMPLIFIER With Disable

TYPICAL PERFORMANCE CURVES: V_S = ±5V (Cont.)
G = +2, R_F = 499Ω, and R_L = 100Ω, unless otherwise noted (see Figure 1).
2nd HARMONIC DISTORTION
vs FREQUENCY
–40
V_O = 2Vp-p
–50 ^{RL = 100Ω}
G = +10, R_F = 180Ω
G = +5, R_F = 261Ω
–60
–70
G = +2, R_F = 402Ω
–80
–90
0.1
1
Frequency (MHz)
10 20
3rd HARMONIC DISTORTION
vs FREQUENCY
–50
V_O = 2Vp-p
R_L = 100Ω
–60
G = +10, R_F = 182Ω
–70
G = +5, R_F = 365Ω
G = +2, R_F = 499Ω
–80
–90
0.1
1
Frequency (MHz)
10 20
INPUT VOLTAGE AND CURRENT NOISE DENSITY
100
Inverting Input Current Noise
15.1pA/√Hz
10
Non-Inverting Input Current Noise 12.2pA/√Hz
1
100
Voltage Noise
2.2nV/√Hz
1k
10k
100k
1M
10M
Frequency (Hz)
TWO-TONE, 3RD-ORDER
INTERMODULATION SPURIOUS
–40
–45 dBc = dB below carriers
–50
50MHz
–55
–60
–65
–70
20MHz
–75
–80
–85
10MHz
Load Power at Matched 50Ω Load
–90
–8 –6 –4 –2 0 2 4 6 8 10
Single-Tone Load Power (dBm)
60
50
40
30
20
10
0
1
RECOMMENDED R_S vs CAPACITIVE LOAD
10
100
Capacitive Load (pF)
FREQUENCY RESPONSE vs CAPACITIVE LOAD
15
12
9
C_L = 10pF
6
3
0
C_L = 47pF
C_L = 22pF
–3 V_IN
–6
–9
–12
–15
0
R_S
V_O
499Ω
C_L
1kΩ
499Ω
1kΩ is optional.
C_L = 100pF
150MHz
Frequency (30MHz/div)
300MHz
®
7
OPA3681