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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.

Condition

General Conditions

Local Oscillator

LO LB Input Frequency 824

915

MHz

RF LB Output Frequency 824

915

MHz

Input Power -6.0

0.0

+3.0

dBm

IQ Baseband Inputs

IQ Level

1.2

8PSK

VP-P

Input IQ signal driven differentially and in

quadrature.

IQ Common Mode

1.2

V

Input Bandwidth 0.7

1.0

MHz

Baseband Filter Attenuation 20

dB

At 20MHz offset

Output Performance with Modulated Baseband Inputs

High Band EDGE 8PSK Mode (DCS1800/PCS1900)

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

Settings)

Output Power

Maximum Output Power with 8PSK

Modulated Signal*

VCC=2.7V, T=+25°C

Maximum VGC

-1

+1.5

dBm

While meeting spectral mask

Minimum VGC

-40

-38

dBm

While meeting spectral mask

Gain Range

42

dB

Difference between output power at GC=2.0V

and GC=0.2V.

Out-of-Band Emission

Spectrum Emission Mask*

Frequency Spacing

200 kHz

250 kHz

400 kHz

600kHz to 1800kHz

1800kHz to 3000kHz

-36

TBD

dBc

30kHz BW

-43

TBD

dBc

30kHz BW

-67

TBD

dBc

30kHz BW

-73

dBc

30kHz BW

-73

dBc

100kHz BW

3000kHz to 6000kHz

-73

dBc

100kHz BW

> 6000 kHz

-75

dBc

100kHz BW

Error Vector Magnitude

8PSK Modulation

RMS*

1.3

3

%

Origin Offset*

-37

-30

dB

Peak*

3

11

%

Output Noise

At FC±20MHz*

Relative Noise at:

Maximum Gain

Absolute Noise at:

-154

-150

dBc/Hz

dBc/Hz

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

GC=2.0V to 1.4V

Maximum Gain

All Gain Settings

* Not tested in Production

-153

-151

dBm

dBm

GC=2.0V, IQ=0VP-P

IQ=1.2VP-P 8PSK

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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