LT5579 datasheet(1/20 Pages) LINER

Part #	LT5579

Description	1.5GHz to 3.8GHz High Linearity Upconverting Mixer

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Manufacturer	LINER [Linear Technology]

Direct Link	http://www.linear.com

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LT5579

5579fa

Typical applicaTion

FeaTures

applicaTions

DescripTion

1.5GHz to 3.8GHz

High Linearity

Upconverting Mixer

n

GSM/EDGE,W-CDMA,UMTS,LTEandTD-SCDMA

Basestations

n

2.6GHzand3.5GHzWiMAXBasestations

n

2.4GHzISMBandTransmitters

n

HighPerformanceTransmitters

L

,LT,LTC,LTM,LinearTechnologyandtheLinearlogoareregisteredtrademarksofLinear

TechnologyCorporation.Allothertrademarksarethepropertyoftheirrespectiveowners.

*Operationoverwiderfrequencyrangeispossiblewithreducedperformance.

ConsultLinearTechnologyforinformationandassistance.

Frequency Upconversion in 2.14GHz W-CDMA Transmitter

Gain, NF and OIP3 vs

RF Output Frequency

n

High Output IP3: +27.3dBm at 2.14GHz

n

Low Noise Floor: –158dBm/Hz (POUT = –5dBm)

n

High Conversion Gain: 2.6dB at 2.14GHz

n

Wide Frequency Range: 1.5GHz to 3.8GHz*

n

Low LO Leakage

n

Single-Ended RF and LO

n

Low LO Drive Level: –1dBm

n

Single3.3VSupply

n

5mm

×5mmQFN24Package

TheLT®5579mixerisahighperformanceupconverting

mixeroptimizedforfrequenciesinthe1.5GHzto3.8GHz

range.Thesingle-endedLOinputandRFoutputports

simplifyboardlayoutandreducesystemcost.Themixer

needsonly–1dBmofLOpowerandthebalanceddesign

resultsinlowLOsignalleakagetotheRFoutput.At2.6GHz

operation,theLT5579provideshighconversiongainof

1.3dB,highOIP3of+26dBmandalownoisefloorof

–157.5dBm/Hzata–5dBmRFoutputsignallevel.

TheLT5579offersahighperformancealternativetopas-

sivemixers.Unlikepassivemixers,whichhaveconversion

lossandrequirehighLOdrivelevels,theLT5579delivers

conversiongainatsignificantlylowerLOinputlevelsand

islesssensitivetoLOpowerlevelvariations.Thelower

LOdrivelevelrequirements,combinedwiththeexcellent

LOleakageperformance,translateintolowerLOsignal

contaminationoftheoutputsignal.

BIAS

LT5579

RF

GND

LO

VCC

3.3V

5579 TA01a

1µF

IF+

IF–

40nH

11

33pF

82pF

MABAES0061

4:1

82pF

100pF

1nF

0.45pF

RF

OUTPUT

2140MHz

LO INPUT

–1dBm (TYP)

IF

INPUT

240MHz

3.9nH

40nH

RF FREQUENCY (MHz)

1900

0

5

10

15

20

25

OIP3

SSB NF

GAIN

30

2000

2100

2200

2300

5579 TA01b

2400

TA = 25°C

VCC = 3.3V

fIF = 240MHz

fLO = fRF + fIF

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