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RF3854

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

RF Micro Devices 

RF3854

Parameter

Specification

Unit

Min.

Typ.

Max.

Output Performance with CW Baseband Inputs

High Band Mode (DCS1800/PCS1900)

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

Settings)

VGA and PA Driver

Output Power 8PSK Modulated*

0

Output Power CW

0

*

-44

Gain Control Voltage Range 0.2

Gain Control Range

2.2

2

-1.6

-17.6

-30

-40

42

dBm

+6.0

dBm

dBm

dBm

dBm

-37

dBm

2.0

V

dB

Gain Control Slope

28

dB/V

Modulator

Sideband Suppression

-45

-30

dBc

*

-45

-30

dBc

*

-45

-30

dBc

*

-45

-30

dBc

*

-45

-30

dBc

Carrier Suppression

-40

-34

dBc

-40

-34

dBc

*

-40

-33

dBc

-39

-30

dBc

-37

-30

dBc

3rd Harmonic of Modulation

Suppression at FC-3x300kHz

-50

-40

dBc

Spurious Outputs

Spurious Outputs at Integer

Harmonics of 1/2xFLOHB

FLO LB

-70.0

dBm

4xFLO LB

-25.0

dBm

6xFLO LB

-40.0

dBm

Output Compression

Output P1dB*

+8.0

dBm

* Not tested in Production

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

Condition

VCC=2.7V, T=+25°C,

LO=1710MHz to 1910MHz at 0dBm,

IQ=800mVP-P** at 100kHz,

unless otherwise noted

GC=2.0V, IQ=1.2VP-P 8PSK

GC=2.0V, IQ=800mVP-P at 100kHz

GC=1.5V, IQ=800mVP-P at 100kHz

GC=1.0V, IQ=800mVP-P at 100kHz

GC=0.5V, IQ=800mVP-P at 100kHz

GC=0.2V, IQ=800mVP-P at 100kHz

Difference between output power at GC=2.0V

and GC=0.2V

Calculated between GC=0.5V and 1.5V

GC=2.0V, No I/Q adjustment

GC=1.5V, No I/Q adjustment

GC=1.0V, No I/Q adjustment

GC=0.5V, No I/Q adjustment

GC=0.2V, No I/Q adjustment

GC=2.0V, No I/Q adjustment

GC=1.5V, No I/Q adjustment

GC=1.0V, No I/Q adjustment

GC=0.5V, No I/Q adjustment

GC=0.2V, No I/Q adjustment

GC = 2.0 V

FLOx2 Mode

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

FLO LB leakage

Second harmonic of carrier

Third harmonic of carrier

I/Q = 100 kHz

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

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

Rev A1 DS070313

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