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Optimum Technology Matching® Applied

GaAs HBT

InGaP HBT

GaAs MESFET

SiGe BiCMOS

Si BiCMOS

SiGe HBT

GaAs pHEMT

Si CMOS

Si BJT

GaN HEMT

Functional Block Diagram

RF MICRO DEVICES®, RFMD®, Optimum Technology Matching®, Enabling Wireless Connectivity™, PowerStar®, POLARIS™ TOTAL RADIO™ and UltimateBlue™ are trademarks of RFMD, LLC. BLUETOOTH is a trade-

mark owned by Bluetooth SIG, Inc., U.S.A. and licensed for use by RFMD. All other trade names, trademarks and registered trademarks are the property of their respective owners. ©2006, RF Micro Devices, Inc.

Product Description

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

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

RF MEMS

LDMOS



Frac-N

sequence

generator

N

divider

Phase /

freq

detector

Charge

pump

Ref

divider

Synth

LO

divider

RF2053

HIGH PERFORMANCE FRACTIONAL-N

SYNTHESIZER WITH INTEGRATED RF MIXER

The RF2053 is a low power, high performance, wideband RF frequency conversion

chip with integrated local oscillator (LO) generation and RF mixer. The RF synthe-

sizer includes an integrated fractional-N phase locked loop that can control an

external VCO to produce a low-phase noise LO signal with a very fine frequency res-

olution. The VCO output frequency can be divided by 1, 2, or 4 in the LO divider,

whose output is buffered and drives the built-in RF mixer which converts the signal

into the required frequency band. The mixer bias current can be programmed

dependent on the required performance and available supply current. The LO gen-

eration blocks have been designed to operate with external VCOs covering the fre-

quency range from 300MHz to 2400MHz. The RF mixer is very broad band and

operates from 30MHz to 2500MHz at the input and output, enabling both up and

down conversion. An external crystal of between 10MHz and 52MHz or an external

reference source of between 10MHz and 104MHz can be used with the RF2053 to

accommodate a variety of reference frequency options.

All on-chip registers are controlled through a simple three-wire serial interface. The

RF2053 is designed for 2.7V to 3.6V operation for compatibility with portable, bat-

tery powered devices. It is available in a plastic 32-pin, 5mmx5mm QFN package.

Features



Fractional-N Synthesizer



Very Fine Frequency Resolution

1.5Hz for 26MHz Reference



300MHz to 2400MHz External

VCO Frequency Range



On-Chip Crystal-Sustaining

Circuit With Programmable

Loading Capacitors



Integrated LO Buffer and LO

Divider



High-Linearity RF Mixer



Mixer Input IP3 +23dBm Typ.



Mixer Bias Adjustable for Low

Power Operation



Mixer Frequency Range 30MHz

to 2500MHz



2.7V to 3.6V Power Supply



Low Current Consumption

50mA to 70mA at 3V



3-Wire Serial Interface

Applications



CATV Head-Ends



Digital TV Up/Down Converters



Digital TV Repeaters



Multi-Dwelling Units



Frequency Band Shifters



UHF/VHF Radios



Software Defined Radios



Satellite Communications



Super-Heterodyne Radios

DS140110

Package: QFN, 32-Pin, 5mmx5mm

RF2053