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THS9000 Datasheet, PDF (12/18 Pages) Texas Instruments – 50 MHz to 400 MHz CASCADEABLE AMPLIFIER | |||
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THS9000
SLOS425B â DECEMBER 2003 â REVISED APRIL 2006
www.ti.com
Figure 24 shows the THS9000 and Sawtek #854916 SAW filter frequency response along with the frequency
response of the SAW filter alone. The SAW filter has a center frequency of 140 MHz with 10-MHz bandwidth and
8-dB insertion loss. It can be seen that the frequency response with the THS9000 is the same as with the SAW
except for a 15-dB gain. The THS9000 is mounted on the standard EVM with VS = 5 V, R(BIAS) = 237 â¦, and
L(COL) = 470 nH. Note the amplifier does not add artifacts to the signal.
SAW + THS9000
RED =
THS9000
SAW
SAW Only
GREEN =
SAW
140 MHz
140 MHz SAW: Sawtek #854916
Figure 24. Frequency Response of the THS9000 and SAW Filter, and SAW Filter Only
C(BYP)
0.1 mF
VS
L(COL)
CO IF(OUT)
1 nF
6
5
4
THS9000
IF(IN) CI
1
2
3
1 nF
R(BIAS)
VS
Figure 25. THS9000 Recommended Circuit (used for all tests)
12
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