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TRF3702
www.ti.com
SLWS149A – SEPTEMBER 2004 – REVISED AUGUST 2006
APPLICATION INFORMATION (continued)
The TRF3702 can also be used for multicarrier applications, as is illustrated in Figure 75 . For a 4-carrier case at
a total output power of –16.7 dBm, an ACPR of almost 63 dBc can be reached. Figure 76 shows the ACPR
profile for a 4-carrier WCDMA application versus per-carrier channel power. Further improvements in
performance can be achieved by including a low-pass filter between the output of the DAC and the input to the
TRF3702, based on the frequency planning and specific requirements of a given design. The combination of the
TRF3702, the DAC568x, and the TRF3750 provides a unique signal-chain chipset capable of delivering
state-of-the-art levels of performance for the most challenging WCDMA applications.
FOUR-CARRIER WCDMA ACPR
vs
0
FOUR-CARRIER WCDMA ACPR PERFORMANCE
f LO = 2140 MHz
64
CHANNEL POWER (PER CARRIER)
?20
Total Carrier Power = ?16.7 dBm
ACPR = 62.8 dBc
63
ALT ACPR = 63.7 dBc
62
?40
61
?60
60
?80
59
?100
?120
58
57
2110
2120
2130
2140
2150
2160
2170
?30
?25
?20
?15
?10
f ? Frequency ? MHz
G069
Channel Power (Per Carrier) ? dBm
G070
32
Figure 75.
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Figure 76.
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