THS4061_08 Datasheet, PDF (18/30 Pages) Texas Instruments – 180-MHz HIGH-SPEED AMPLIFIERS

THS4061, THS4062
180ĆMHz HIGHĆSPEED AMPLIFIERS
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SLOS234E − DECEMBER 1998 − REVISED DECEMBER 2003
APPLICATION INFORMATION
circuit layout considerations (continued)
D Surface-mount passive components − Using surface-mount passive components is recommended for
high-frequency amplifier circuits for several reasons. First, because of the extremely low lead inductance
of surface-mount components, the problem with stray series inductance is greatly reduced. Second, the
small size of surface-mount components naturally leads to a more compact layout, thereby minimizing both
stray inductance and capacitance. If leaded components are used, it is recommended that the lead lengths
be kept as short as possible.
evaluation board
An evaluation board is available for the THS4061 (literature number SLOP226) and THS4062 (literaure number
SLOP235). This board has been configured for very low parasitic capacitance in order to realize the full
performance of the amplifier. A schematic of the evaluation board is shown in Figure 29. The circuitry has been
designed so that the amplifier may be used in either an inverting or noninverting configuration. To order the
evaluation board contact your local TI sales office or distributor. For more detailed information, refer to the
THS4061 EVM User’s Manual (literature number SLOU038) or the THS4062 EVM User’s Manual (literature
number SLOU040)
VCC+
C3
0.1 µF
+ _C2
6.8 µF
IN +
R3
49.9 Ω
R2
1 kΩ
IN −
R1
49.9 Ω
R4
1 kΩ
C4
0.1 µF
NULL
+
THS4061
_
NULL
R5
49.9 Ω
C1
+ ^{6.8 µF}
VCC −
OUT
Figure 29. THS4061 Evaluation Board Schematic
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