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TRF3702
www.ti.com
SLWS149A – SEPTEMBER 2004 – REVISED AUGUST 2006
APPLICATION INFORMATION (continued)
GND
+5 V
VCC
221 W
221 W
49.9 W
49.9 W
F data
A
Offset
IOUTA1
15 W
IVIN
IREF
DEMUX
DA[15:0]
16-Bit
DAC
IOUTA2
15 W
DB[15:0]
A Gain
B Gain
B
Offset
16-Bit
DAC
IOUTB1
IOUTB2
15 W
15 W
LO
QVIN
QREF
50 ?
+45 °
–45 °
Σ
RFOUT
DAC5686
221 W
49.9 W
221 W
49.9 W
TRF3701
PWD
GND
GND
+5 V
S0010-01
Figure 70. DAC5686 in Dual-DAC Mode With Quadrature Modulator
GSM Applications
The TRF3702 is ideally suited for GSM applications, because it combines high linearity with low noise levels.
Figure 60 and Figure 61 show the distribution of noise vs output power for the TRF3702 over the entire
recommended temperature range. The level of noise attained in combination with the superior IMD3
performance shown in Figure 40 means that the user can reach superior levels of C/N while maintaining high
linearity. This combination offers the capability of delivering low levels of EVM, meeting the stringent
requirements imposed by the GSM/EDGE standards. Figure 71 shows the spectral mask compliance for the
device versus channel power, for both 400-kHz and 600-kHz offsets.
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