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RF3854

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

RF Micro Devices 

RF3854

Parameter

General Conditions

Local Oscillator

LO LB Input Frequency

RF WB Output Frequency

Input Power

IQ Baseband Inputs

Min.

960

1920

-10.0

Specification

Typ.

Max.

990

1980

0.0

+3.0

Unit

MHz

MHz

dBm

IQ Level

0.8

VP-P

IQ Common Mode

1.2

V

Input Bandwidth

8

11

MHz

Baseband Filter Attenuation 10

dB

Output Performance with CW Baseband Inputs

Wideband Mode

Mode=Wideband FLOx2 (see Control Logic Truth Table for Mode Control

Settings)

VGA and PA Driver

Output Power W-CDMA Modu-

5

lated*

dBm

Output Power CW

2

5

8

dBm

Gain Control Voltage Range 0.2

2.0

V

Gain Control Range

92

dB

Gain Control Slope

73

dB/V

Modulator

Sideband Suppression

-48

-30

dBc

*

-50

-30

dBc

*

-50

-30

dBc

*

-50

-30

dBc

Carrier Suppression

-42

-30

dBc

-41

-30

dBc

-38

-30

dBc

-23

-10

dBc

3rd Harmonic of Modulation

Suppression at FC-3x300kHz

-55

-50

dBc

Spurious Outputs

Spurious Output at Integer Multi-

ples of FLO LB*

FLO LB

-60.0

dBm

4xFLO LB

-14.0

0

dBm

6xFLO LB

-47.0

0

dBm

Output Compression

Output P1dB*

+11.5

dBm

* Not tested in Production

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

Condition

3GPP W-CDMA

HQPSK, 1DPCCH+1DPDCH

Input IQ signal driven differentially and in

quadrature.

At 40MHz offset

VCC=2.7V, T=+25°C, LO=975MHz to

990MHz at -10dBm, IQ=540mVP-P** at

100kHz, unless otherwise noted

GC=2.0V, IQ=0.8VP-P at HQPSK

GC = 2.0 V

Difference between output power at GC=2.0V

and GC=0.2V

Calculated between GC=1.0V and 0.5V

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=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 = 2.0 V

GC=2.0V, I/Q=540mVP-P at 100kHz

FLO LB leakage

Second harmonic of carrier

Third harmonic of carrier

I/Q = 100 kHz

Rev A1 DS070313

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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