RF5345 Datasheet, PDF (13/20 Pages) RF Micro Devices – 2.4GHz TO 2.5GHz, 802.11b/g/n WiFi FRONT END MODULE

RF5345
RF5345 Theory of Operation
The RF5345 FEM can be applied in many portable applications such as handsets, digital cameras, personal media players,
and more. This highly integrated module can be connected directly to the battery without additional voltage regulators.
WiFi Transmit Mode
The RF5345 requires a single positive supply (VCC), a positive supply for switch controls, and a regulated supply for the Vreg
pin to maintain nominal bias current. If desired, the switch control voltages may be tied directly to VCC as long as the maximum
operating voltage does not exceed 4.8V. The RF5345 transmit path has a typical gain of 25dB from 2.4GHz to 2.5GHz, and
delivers 17dBm typical output power under 54Mbps OFDM modulation and 20dBm under 1Mbps 11b modulation.
While in transmit mode, the active components are the Power Amplifier (PA) and the TX branch of the SP3T switch. Refer to fig-
ures 1 and 2 below for proper settings.
P-Meter
Sig Gen
Vreg Supply
Voltage
Dual Channel
TX_In Port
Coupler
DUT
ANT Port _Coupler
Spectrum
Analyzer
Main Supply
Voltage
Dual Channel
Multimeter to
sense Pdetect
Figure 1. WiFi Transmit Path Test Setup
DS120215
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
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