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SLWS245B – MAY 2014 – REVISED FEBRUARY 2017
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9.2.3 Application Curves: DAC34H84 with TRF3722 Modulator Performance
The cascaded combination of the DAC34H84 and TRF3722 modulator yields excellent system parameters
suitable for high-performance applications.
and
show 152.9 MHz IF adjacent channel
power ratio (ACPR) performance.
•
Mode integer
•
PFD: 3.2 MHz
•
Reference: 153.6 MHz
•
LO = 1689.6 MHz
•
IF = 152.9 MHz
•
RF= 1842.5 MHz
Figure 137. 152.9 MHz IF, DA TRF3722 20 MHz
LTE ACPR
Figure 138. 152.9 MHz IF, 6 Carrier MC-GSM DA
TRF3722 ACPR Performance
10 Power Supply Recommendations
The TRF3722 is powered by supplying a nominal 3.3 V and 5 V. It can also be powered using only 3.3V supply.
Proper RF bypassing should be placed close to each power supply pin. Ground pin connections should have at
least one ground via close to each ground pin to minimize ground inductance. The PowerPAD™ must be tied to
ground, preferably with the recommended ground via pattern to provide a good thermal conduction path to the
alternate side of the board and to provide a good RF ground for the device. (Refer to
section
for additional information.)
