OPA2695 Datasheet, PDF (13/40 Pages) Texas Instruments – Dual, Ultra-Wideband, Current-Feedback OPERATIONAL AMPLIFIER with Disable

OPA2695
www.ti.com..................................................................................................................................................................................................... SBOS354 – APRIL 2008
TYPICAL CHARACTERISTICS: V_S = ±5V, Differential Operation
At G_D = 10V/V, R_F = 500Ω, and R_L = 800Ω, unless otherwise noted.
+5V
1/2
OPA2695
Z_I = R_T || 2R_G
R_G
V_I
1:1
R_F
500W
R_T
R_F
R_G
500W
R_L
800W
V_O
V_O
V_I
=
500W
R_G
= G_D
1/2
OPA2695
-5V
Figure 33.
DIFFERENTIAL LARGE-SIGNAL FREQUENCY RESPONSE
21
G_D = 10V/V
20
19
18
17
16
10
V_O = 8V_PP
V_O = 2V_PP
V_O = 4V_PP
V_O = 12V_PP
V_O = 16V_PP
100
500
Frequency (MHz)
Figure 35.
RECOMMENDED R_S vs CAPACITIVE LOAD
1k
100
10
1
1
10
100
1000
Capacitive Load (pF)
Figure 37.
DIFFERENTIAL SMALL-SIGNAL FREQUENCY RESPONSE
1
0
-1
G_D = 5V/V
-2
-3
-4
-5
G_D = 10V/V
-6
G_D = 20V/V
-7
-8
10M
100M
1G
Frequency (Hz)
Figure 34.
DIFFERENTIAL HARMONIC DISTORTION vs FREQUENCY
-65
G_D = 10V/V
-70 ^VO ^{= 2V}PP
R_L = 800W
-75
-80
3rd Harmonic
-85
-90
-95
2nd Harmonic
-100
10
100
Frequency (MHz)
Figure 36.
FREQUENCY RESPONSE vs CAPACITIVE LOAD
9
C_L = 100pF
6
C_L = 47pF
C_L = 22pF
C_L = 10pF
3
+5V
0
-3 ^PI
OPA2695
50W
500W
50W
500W
RS
RS
CL
1kW⁽¹⁾
-6
-9
10
OPA2695
NOTE: (1) Optional 1kW load.
-5V
100
Frequency (MHz)
Figure 38.
400
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