THS3491 Datasheet, PDF (9/28 Pages) Texas Instruments – 900-MHz, High-Power Output, Current Feedback Amplifier

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THS3491
SBOS875 – AUGUST 2017
7.7 Typical Characteristics: ±15 V
at +V_S = 15 V, –V_S = –15 V, T_A = 25°C, R_LOAD = 100 Ω, noninverting gain = 5 V/V, and RGT package: R_F = 576 Ω, R_G = 143
Ω, or DDA package: R_F = 798 Ω, R_G = 200 Ω (unless otherwise noted)
3
3
0
0
-3
-3
-6
-6
-9
-12
-15
1
G = 2, R_F = 976 :
G = 5, R_F = 576 :
G = 10, R_F = 499 :
G = 20, R_F = 383 :
10
100
Frequency (MHz)
V_O = 2V_PP
RGT package
1000
4000
D001
Figure 1. Noninverting Small-Signal Frequency Response
18
15
12
-9
-12
-15
1
G = 2, R_F = 2100 :
G = 5, R_F = 798 :
G = 10, R_F = 704 :
G = 20, R_F = 564 :
10
100
Frequency (MHz)
V_O = 2V_PP
DDA package
1000
4000
D006
Figure 2. Noninverting Small-Signal Frequency Response
1000
1000
Vn
Inp
Inm
100
100
9
6
V_O = 2 V_PP
V_O = 5 V_PP
3
V_O = 10 V_PP
V_O = 20 V_PP
V_O = 26 V_PP
0
1
10
G = +5, R_F = 576-Ω
100
Frequency (MHz)
RGT package
1000
4000
D002
Figure 3. Frequency Response vs Output Swing
6
5
V_IN
V_OUT
4
3
2
1
0
-1
-2
-3
-4
-5
-6
Time (4 nsec/div)
D005
V_O = 10 V_PP
Figure 5. Pulse Response
10
10
1
1
100
1000
10000 100000 1000000 1E+7
Frequency (Hz)
D003
Figure 4. Spot Input Noise vs Frequency
12
10
V_IN
V_OUT
8
6
4
2
0
-2
-4
-6
-8
-10
-12
Time (4 nsec/div)
D004
V_O = 20 V_PP
Figure 6. Pulse Response
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