max2645eubt Maxim Integrated Products, Inc., max2645eubt Datasheet

max2645eubt

Manufacturer Part Number

max2645eubt

Description

Max2645 3.4ghz To 3.8ghz Sige Low-noise Amplifier/pa Predriver

Manufacturer

Maxim Integrated Products, Inc.

Datasheet

1.MAX2645EUBT.pdf (12 pages)

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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

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.

19-1759; Rev 1; 8/03

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.

Wireless Local Loop

Wireless Broadband Access

Digital Microwave Radios

LOGIC

INPUTS

3.5GHz

INPUT

GAIN STEP

SHUTDOWN

________________________________________________________________ Maxim Integrated Products

BIAS

General Description

RFIN

GND

HIGH

GAIN

3mm) with an exposed

LOW

GAIN

BIAS AND POWER

Applications

MANAGEMENT

Low-Noise Amplifier/PA Predriver

MAX2645

RADIAL STUB

LINE

o 3.4GHz to 3.8GHz Frequency Range

o LNA Performance (High/Low-Gain Modes)

o Highly Versatile Application

o Adjustable IP3 and Supply Current

o 0.1µA Supply Current in Shutdown Mode

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

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

3.4GHz to 3.8GHz SiGe

*EP = exposed paddle.

Pin Configuration appears at end of data sheet.

MAX2645EUB

Gain: +14.4dB/-9.7dB

NF: 2.3dB/15.5dB

Input IP3: +4dBm/+13dBm

Supply Current: 9.2mA/2.7mA

Receive Path 1st and 2nd Stage LNA

Transmit PA Predriver

LO Buffer

PART

OUTPUT

APPLICATION

LNA, LOW NF

LNA, HIGH IP3

PA PREDRIVER

CIRCUIT

Typical Operating Circuit

-40 C to +85 C

TEMP RANGE

Ordering Information

14.9/-10.7

14.4/-9.7

15.2/-9.7

GAIN

(dB)

2.3/15.5

2.6/16

(dB)

10 µMAX-EP*

PIN-PACKAGE

+11.8/+16.2

+10/+15.5

Features

(dBm)

+4/+13

IIP3

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