OPA2691 Datasheet, PDF (7/30 Pages) Texas Instruments – Dual Wideband, Current-Feedback OPERATIONAL AMPLIFIER

TYPICAL CHARACTERISTICS: V_S = ±5V (Cont.)
G = +2, R_F = 402Ω, R_L = 100Ω, 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/√Hz)
Noninverting Input Current Noise (12pA/√Hz)
Voltage Noise (1.7nV/√Hz)
1k
10k
100k
1M
10M
Frequency (Hz)
2-TONE, 3RD-ORDER
INTERMODULATION SPURIOUS
–30
dBc = dB below carriers
50MHz
–40
20MHz
–50
10MHz
–60
–70
–80
Load Power at Matched 50Ω Load
–90
–8 –6 –4 –2 0 2 4 6 8 10
Single-Tone Load Power (dBm)
70
60
50
40
30
20
10
0
1
RECOMMENDED R_S vs CAPACITIVE LOAD
10
100
1k
Capacitive Load (pF)
FREQUENCY RESPONSE vs CAPACITIVE LOAD
9
6
C_L = 10pF
3
C_L = 22pF
0
V_IN
–3
1/2
R_S
V_O
OPA2691
C_L = 47pF
–6
–9
0
402Ω
C_L
1kΩ
402Ω
1kΩ is optional.
C_L = 100pF
125MHz
Frequency (25MHz/div)
250MHz
LARGE-SIGNAL DISABLE/ENABLE RESPONSE
6.0
4.0
V_DIS
2.0
0
2.0
1.6
Output Voltage
1.2
0.8
0.4
V_IN = +1V
0
Time (200ns/div)
DISABLED FEEDTHROUGH vs FREQUENCY
–45
–50
V_DIS = 0
–55
–60
–65
–70
–75
–80 _Reverse
–85
–90
Forward
–95
–100
0.3
1
10
100
Frequency (MHz)
OPA2691
7
SBOS224D
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