OPA2691 Datasheet, PDF (9/30 Pages) Texas Instruments – Dual Wideband, Current-Feedback OPERATIONAL AMPLIFIER

TYPICAL CHARACTERISTICS: V_S = +5V
G = +2, R_F = 499Ω, R_L = 100Ω to +2.5V, unless otherwise noted (see Figure 2 for AC performance only).
SMALL-SIGNAL FREQUENCY RESPONSE
1
0
G = +1,
R_F = 499Ω
–1
G = +2,
–2
R_F = 453Ω
–3
G = +5,
R_F = 340Ω
–4
–5
–6
–7
V_O = 0.5Vp-p
–8
0
G = +10,
R_F = 180Ω
125MHz
Frequency (25MHz/div)
250MHz
LARGE-SIGNAL FREQUENCY RESPONSE
7.0
6.5
V_O = 0.5Vp-p
6.0
5.5
5.0
4.5
V_O = 2Vp-p
4.0
3.5
3.0
G = +2
2.5 _{RL = 100Ω to 2.5V}
2.0
0
V_O = 1Vp-p
125MHz
Frequency (25MHz/div)
250MHz
SMALL-SIGNAL PULSE RESPONSE
2.9
G = +2
2.8
V_O = 0.5Vp-p
2.7
2.6
2.5
2.4
2.3
2.2
2.1
Time (5ns/div)
LARGE-SIGNAL PULSE RESPONSE
4.1
G = +2
3.7
V_O = 2Vp-p
3.3
2.9
2.5
2.1
1.7
1.3
0.9
Time (5ns/div)
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
0
+5V
–3
VI ^{0.1µF 806Ω}
1/2
VO
57.6Ω 806Ω OPA2691
RS
–6
453Ω
CL
1kΩ
–9
0
453Ω
0.1µF
1kΩ is optional.
C_L = 47pF
C_L = 22pF
C_L = 100pF
125MHz
250MHz
Frequency (25MHz/div)
OPA2691
9
SBOS224D
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