Rainbow-electronics MAX2645 Manual do Utilizador descarregar pdf

General Description

The MAX2645 is a versatile, high-linearity, low-noise

amplifier designed for 3.4GHz to 3.8GHz wireless local

loop (WLL), wireless broadband access, and digital

microwave radio applications. The device features an

externally adjustable bias control, set with a single resis-

tor, that allows the user to meet minimum linearity require-

ments while minimizing current consumption. The

amplifier’s high-gain, low-noise performance and

adjustable input third-order intercept (IP3) allow it to be

used as a low-noise amplifier (LNA) in the receive path, a

PA predriver in the transmit path, or as an LO buffer.

The MAX2645 features a logic-level gain control that pro-

vides a 25dB step reduction in gain, which improves IP3

performance for operation during high input signal level

conditions. Supply current is reduced from 9mA in high-

gain mode to 3mA in low-gain mode. The device also

includes a logic-controlled shutdown mode, which

reduces supply current to 0.1µA. The MAX2645 operates

from a +3V to +5.5V supply and is offered in the miniature

10-pin µMAX package (5mm

3mm) with an exposed

paddle. Its performance has been optimized for use with

the MAX2683/MAX2684 3.5GHz SiGe mixers to provide a

complete high-performance, front-end solution for 3.5GHz

applications.

Applications

Wireless Local Loop

Wireless Broadband Access

Digital Microwave Radios

Features

♦ 3.4GHz to 3.8GHz Frequency Range

♦ LNA Performance (High/Low-Gain Modes)

Gain: +14.4dB/-9.7dB

NF: 2.3dB/15.5dB

Input IP3: +4dBm/+13dBm

Supply Current: 9.2mA/2.7mA

♦ Highly Versatile Application

Receive Path 1st and 2nd Stage LNA

Transmit PA Predriver

LO Buffer

♦ Adjustable IP3 and Supply Current

♦ 0.1µA Supply Current in Shutdown Mode

♦ +3.0V to +5.5V Single-Supply Operation

♦ 10-Pin µMAX-EP Package (5.0mm x 3.0mm)

MAX2645

________________________________________________________________ Maxim Integrated Products 1

19-1759; Rev 0; 7/00

For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.

For small orders, phone 1-800-835-8769.

3.4GHz to 3.8GHz SiGe

Low-Noise Amplifier/PA Predriver

Ordering Information

Pin Configuration appears at end of data sheet.

PART TEMP. RANGE

PIN-PACKAGE

MAX2645EUB -40°C to +85°C 10 µMAX-EP*

*Exposed paddle

APPLICATION

CIRCUIT

LNA, LOW NF 14.4/-9.7 2.3/15.5

+4/+13

+10/+15.5

+11.8/+16.2

2.6/16

14.9/-10.7

15.2/-9.7

LNA, HIGH IP3

PA PREDRIVER

GAIN

(dB)

IIP3

(dBm)

MAX2645

BIAS AND POWER

MANAGEMENT

RFIN

INPUT

3.5GHz

HIGH

GAIN

LOW

GAIN

GND

GAIN STEP

SHUTDOWN

LOGIC

INPUTS

BIAS

RADIAL STUB

OUTPUT

LINE

Typical Operating Circuit

EVALUATION KIT MANUAL

FOLLOWS DATA SHEET

1 2 3 4 5 6 ... 11 12

3.4GHz to 3.8GHz SiGe 1

Resumo do Conteúdo

Página 1 - 3.4GHz to 3.8GHz SiGe

General DescriptionThe MAX2645 is a versatile, high-linearity, low-noiseamplifier designed for 3.4GHz to 3.8GHz wireless localloop (WLL), wireless bro

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RF OutputThe RFOUT port is an open-collector output that must betied to VCCthrough an inductance for proper biasing.The MAX2645 EV kit uses a length o

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MAX26453.4GHz to 3.8GHz SiGe Low-Noise Amplifier/PA Predriver______________________________________________________________________________________ 11

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MAX26453.4GHz to 3.8GHz SiGe Low-Noise Amplifier/PA Predriver_______________________________________________________________________________________ 3

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7891011121314153.0 3.5 4.0 4.5 5.0 5.5SUPPLY CURRENT vs. SUPPLY VOLTAGE(HIGH-GAIN MODE)MAX2645-01SUPPLY VOLTAGE (V)SUPPLY CURRENT (mA)TA = +25°CTA = +

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MAX26453.4GHz to 3.8GHz SiGe Low-Noise Amplifier/PA Predriver_______________________________________________________________________________________ 5

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MAX26453.4GHz to 3.8GHz SiGe Low-Noise Amplifier/PA Predriver6 _______________________________________________________________________________________

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MAX26453.4GHz to 3.8GHz SiGe Low-Noise Amplifier/PA Predriver_______________________________________________________________________________________ 7

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MAX26453.4GHz to 3.8GHz SiGe Low-Noise Amplifier/PA Predriver_______________________________________________________________________________________ 9

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Rainbow-electronics MAX2645 Manual do Utilizador

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