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RF2705G

LOW NOISE, MULTI-MODE, QUAD-BAND, QUADRATURE MODULATOR AND PA DRIVER

RF Micro Devices 

RF2705G

Parameter

Specification

Unit

Min.

Typ.

Max.

Spurious Outputs

Spurious Outputs at Integer

Harmonics of 1/2xFLOHB*

FLO HB

-62.0

dBm

(3/2)xFLO LB

-19.0

dBm

Output Compression

Output P1dB*

+7.0

dBm

Output Performance with CW Baseband Inputs

Low Band Mode (GSM850/GSM900), cont’d

Mode=Low Band FLOx1 (see Control Logic Truth Table for Mode Control

Settings)

Intermodulation

Output IP3*

+20.0

dBm

Intermodulation IM3 tone at

FC+70kHz and FC+130kHz

relative to tones at

FC+90kHz and FC+110kHz

-48

dBc

Low Band Bypass Mode (GSM850/GSM900)

Mode=Low Band Bypass (see Control Logic Truth Table for Mode

Control Settings)

PA Driver

GMSK Input Power*

-3

0

+3

dBm

GMSK Output Power 5.0

Output Impedance*

7.5

10.0

dBm

50

Ω

Output Noise

At FC±20MHz*

* Not tested in Production

-161

-159

dBc/Hz

** Provides the same output power as modulated signal with associated crest factor.

Condition

FLO/2 Mode

GC=2.0V, I/Q=800mVP-P at 100kHz

Second harmonic of carrier and LO leakage

Third harmonic of carrier

I/Q = 100 kHz

GC=2.0V. Extrapolated from IM3 with two

baseband tones at 90kHz and 110kHz applied

differentially, in quadrature, at both I and Q

inputs, each tone 400mVP-P.

GC = 2.0 V

VCC = 2.7 V

At LO LB input from a 50Ω source.

At RF LB output

AM+PM noise, LO=0dBm

Rev A0 DS060206

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

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

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