MAX2645EUB+ Maxim Integrated Products, MAX2645EUB+ Datasheet

MAX2645EUB+

Manufacturer Part Number

MAX2645EUB+

Description

RF Amplifier IC AMP/PA PREDRVR SIGE

Manufacturer

Maxim Integrated Products

Datasheet

1.MAX2645EUB.pdf (12 pages)

Specifications of MAX2645EUB+

Operating Frequency

3.4 GHz to 3.8 GHz

P1db

- 5 dBm

Noise Figure

2.3 dB

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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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

Related parts for MAX2645EUB+

MAX2645EUB+ Summary of contents

Page 1

... GAIN RFIN 3.5GHz Z1 LOW GAIN GND ________________________________________________________________ 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. 3.4GHz to 3.8GHz SiGe Low-Noise Amplifier/PA Predriver o 3.4GHz to 3.8GHz Frequency Range o LNA Performance (High/Low-Gain Modes) Gain: +14.4dB/-9.7dB NF: 2 ...

Page 2

SiGe Low-Noise Amplifier/PA Predriver ABSOLUTE MAXIMUM RATINGS V to GND ...........................................................-0.3V to +6.0V CC GAIN, SHDN, RFOUT to GND .....................0. RFIN Input Power (50 source)........................................16dBm Minimum R ....................................................................10k BIAS Continuous Power Dissipation (T = +70°C) ...

Page 3

AC ELECTRICAL CHARACTERISTICS—LNA (Low-Noise Figure Application Circuit) = GAIN = SHDN = +3.3V,R (MAX2645 EV kit +25°C, unless otherwise noted.) A PARAMETER Frequency Range (Note 2) GAIN = V Gain (Note 3) GAIN = GND Gain ...

Page 4

SiGe Low-Noise Amplifier/PA Predriver AC ELECTRICAL SPECIFICATIONS—PA Predriver Application Circuit = GAIN = SHDN = +3.3V,R (MAX2645 EV kit +25°C, unless otherwise noted.) A PARAMETER Frequency Range (Note 2) GAIN = V Gain ...

Page 5

EV kit +3.3V 20k , f CC BIAS GAIN vs. FREQUENCY (HIGH-GAIN MODE - + + ...

Page 6

SiGe Low-Noise Amplifier/PA Predriver (MAX2645 EV kit +3.3V 20k , f CC BIAS NOISE FIGURE vs. R BIAS (HIGH-GAIN MODE LOW-NOISE FIGURE CIRCUIT 0 15.0 17.5 20.0 22.5 ...

Page 7

EV kit +3.3V 20k , f CC BIAS OUTPUT VSWR vs. FREQUENCY 6.0 LOW-NOISE FIGURE CIRCUIT 5.5 5.0 4.5 LOW GAIN 4.0 3.5 3.0 HIGH GAIN 2.5 2.0 1.5 1.0 3.4 3.5 3.6 3.7 FREQUENCY ...

Page 8

SiGe Low-Noise Amplifier/PA Predriver (MAX2645 EV kit +3.3V 20k , f CC BIAS OUTPUT P1dB POINT vs. SUPPLY VOLTAGE (HIGH-GAIN MODE + ...

Page 9

Detailed Description The MAX2645 is a versatile amplifier with high-gain, high-linearity, and low-noise performance—features that make it suitable for use as an LNA, high-linearity/low- noise amplifier, PA predriver buffer in the 3.4GHz to 3.8GHz frequency range. See Figure ...

Page 10

SiGe Low-Noise Amplifier/PA Predriver Table 2. MAX2645 Noise Parameters FREQUENCY (MHz) F MIN (dB) 3400 2.098 3450 2.122 3500 2.148 3550 2.173 3600 2.198 3650 2.225 3700 2.251 3750 2.279 3800 2.306 3400 2.103 3450 2.127 3500 ...

Page 11

Figure 1. Typical Application Circuit MAX2645 LOW NF LNA DUPLEXER PA Figure 2. Typical System Application Block Diagram ______________________________________________________________________________________ 3.4GHz to 3.8GHz SiGe Low-Noise Amplifier/PA Predriver 1 GND V CC 47pF 2 9 GAIN GND MAX2645 C1 ...

Page 12

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2003 Maxim Integrated Products ...

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