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RF5345

DS120215

7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical

support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.

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.

Figure 1. WiFi Transmit Path Test Setup

Sig Gen

DUT

Main Supply

Voltage

Dual Channel

Spectrum

Analyzer

P-Meter

TX_In Port

ANT Port

Vreg Supply

Voltage

Dual Channel

Coupler

Multimeter to

sense Pdetect

Coupler