THS3001IDR Datasheet, PDF (26/39 Pages) Texas Instruments – 420-MHz HIGH-SPEED CURRENT-FEEDBACK AMPLIFIER

THS3001
SLOS217H – JULY 1998 – REVISED SEPTEMBER 2009................................................................................................................................................. www.ti.com
R_G
R_F
For Stable Operation:
−
THS3001
+
R1
R2
V_I
R2
R1 || R_A
≥
R_F
R_G
V_O
( ) ^{VO ≅ VI}
1 + ^RF
R_G
sR1C1
R_A
C1
Figure 59. Noninverting CFB Integrator
The THS3001 may also be employed as a good video distribution amplifier. One characteristic of distribution
amplifiers is the fact that the differential phase (DP) and the differential gain (DG) are compromised as the
number of lines increases and the closed-loop gain increases (see Figures 22 to 25 for more information). Be
sure to use termination resistors throughout the distribution system to minimize reflections and capacitive
loading.
750 Ω
750 Ω
75-Ω Transmission Line
−
75 Ω
V_I
+
V_O1
THS3001
75 Ω
N Lines
75 Ω
75 Ω
75 Ω
V_ON
Figure 60. Video Distribution Amplifier Application
26
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