Datasheet > MAX9989

MAX9989

更新时间： 2023-12-20 18:45:07

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亚德诺 - ADI		/
页数	文件大小	规格书
12页	347K
描述
+14dBm至+20dBm LO缓冲器，±1dB功率变化

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MAX9989 数据手册

19-2486; Rev 0; 7/02

+14dBm to +20dBm LO Buffers

with 1dB ꢀariation

General Description

Features

The MAX9989 and MAX9990 LO buffers provide the high

output (+14dBm to +20dBm) necessary to drive the LO

inputs of high-linearity passive mixers, while offering 40dB

reverse isolation to prevent LO pulling. The MAX9989 is

internally matched for the cellular/GSM bands, and the

MAX9990 is matched for the DCS/PCS/UMTS bands.

ꢀ ±±1dB OutOuBꢀPoweBꢁVerVurPꢂ

ꢀ +±41dmBuPB+201dmBA1jOsuVblwB OutOuBꢀPowe

ꢀ 401dBRwvweswBIsPlVurPꢂ

ꢀ dwuuweBThVꢂB351dBMVrꢂBDervweB OutOuBuPBꢀLLBAmt

OutOuBIsPlVurPꢂ

The Typical Application Circuit provides a nominal

+17dBm output power with 1dB variation over supply,

temperature, and input power. With two optional resis-

tors, the output power can be precision set from

+14dBm to +20dBm. The devices offer more than 35dB

main driver output to PLL amp output isolation. Each

ꢀ LPoB OutOuBNPrsw:B-±701dc/HzBVuB+±71dm

ꢀ ±±0mABSOttlyBCOeewꢂuBVuB+±71dm

ꢀ ESDBꢀePuwcurPꢂ

ꢀ IsPlVuw1BꢀLLB OutOuB(+31dm)

device is offered in a 5mm 5mm 20-pin thin QFN

package with exposed paddle.

Applications

Cellular/GSM/DCS/PCS/UMTS Base Station

Tx/Rx LO Drives

Ordering Information

TEMꢀ

ꢀIN-

FREQUENCY

ꢀART

RANGE

ꢀACKAGE RANGEB(MHz)

Coherent Receivers

20 Thin

ISM Wireless LAN

MAX9989ETP -40°C to +85°C

700 to 1100

QFN-EP*

Wireless Local Loop

MAX9990ETP -40°C to +85°C 20 QFN-EP* 1500 to 2200

*EP = Exposed paddle.

Local Multipoint Distribution Service

Point-to-Point Systems

Typical Application Circuit/Pin Configuration appears at end of data sheet.

Typical Operating Circuit and Block Diagram

PLL BUFFER

MAX9989

MAX9990

OUTPLL

(+3dBm)

TO PLL

PRESCALER

RF INPUT

OUTPUT AMP

(+7dBm)

OUTLO

(+17dBm)

IF OUTPUT

INPUT AMP

RF LO

BIAS

BIASIN

BIASOUT

BIAS

CONTROL

NETWORK

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

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