THS9001_08 Datasheet, PDF (13/20 Pages) STMicroelectronics – 50 MHz to 350 MHz CASCADEABLE AMPLIFIER

THS9001
www.ti.com
SLOS426B – NOVEMBER 2003 – REVISED JANUARY 2007
APPLICATION INFORMATION (continued)
Figure 24 shows the THS9001 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 THS9001 is the same as with the
SAW except for a 15-dB gain. The THS9001 is mounted on the standard EVM with V_S = 5 V, R_(BIAS) = 237 Ω,
and L_(COL) = 470 nH. Note the amplifier does not add artifacts to the signal.
SAW + THS90001
RED =
SAW
THS9001
SAW Only
GREEN =
SAW
140 MHz
140 MHz SAW: Sawtek #854916
Figure 24. Frequency Response of the THS9001 and SAW Filter, and SAW Filter Only
IF_(IN) C_IN
1 nF
THS9001
1
6
2
5
3
4
V_S
R_(BIAS)
C_OUT IF(QUT)
1 nF
L_(COL)
C_(BYP)
0.1 mF
V_S
Figure 25. THS9001 Recommended Circuit (Used for all Tests)
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