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MGA-72543

PHEMT* Low Noise Amplifier with Bypass Switch

HP => Agilent Technologies 

PHEMT* Low Noise Amplifier

with Bypass Switch

Technical Data

MGA-72543

Features

• Lead-free Option Available

• Operating Frequency

0.1 GHz ~ 6.0 GHz

• Noise Figure:

1.4 dB at 2 GHz

• Gain: 14 dB at 2 GHz

• Bypass Switch on Chip

Loss = -2.5 dB (Id < 5 µA)

IIP3 = +35 dBm

• Adjustable Input IP3

+2 to +14 dBm

• 2.7 V to 4.2 V Operation

• Very Small Surface Mount

Package

Applications

• CDMA (IS-95, J-STD-008)

Receiver LNA

Transmit Driver Amp

• TDMA (IS-136) Handsets

Attention:

Observe precautions for

handling electrostatic

sensitive devices.

ESD Machine Model (Class A)

ESD Human Body Model (Class 0)

Refer to Agilent Application Note A004R:

Electrostatic Discharge Damage and Control.

* Pseudomorphic High

Electron Mobility Transistor

Surface Mount Package

SOT-343 (SC-70)

Pin Connections and

Package Marking

3

INPUT

& Vref

1

GND

4

GND

2

OUTPUT

& Vd

Package marking is 3 characters. The

last character represents date code.

Description

Agilent’s MGA-72543 is an economi-

cal, easy-to-use GaAs MMIC Low

Noise Amplifier (LNA), which is

designed for an adaptive CDMA

receiver LNA and adaptive CDMA

transmit driver amplifier.

The MGA-72543 features a mini-

mum noise figure of 1.4 dB and

14 dB associated gain from a single

stage, feedback FET amplifier. The

output is internally matched to

50Ω. The input is optimally

internally matched for lowest noise

figure into 50Ω. The input may be

additionally externally matched for

low VSWR through the addition of

a single series inductor. When set

into the bypass mode, both input

and output are internally matched

to 50Ω.

The MGA-72543 offers an inte-

grated solution of LNA with

adjustable IIP3. The IIP3 can be

fixed to a desired current level for

the receiver’s linearity require-

ments. The LNA has a bypass

switch function, which sets the

current to zero and provides low

insertion loss. The bypass mode

also boosts dynamic range when

high level signal is being received.

For the CDMA driver amplifier

applications, the MGA-72543

provides suitable gain and linearity

to meet the ACPR requirements

when the handset transmits the

highest power. When transmitting

lower power, the MGA-72543 can

be bypassed, saving the drawing

current.

The MGA-72543 is a GaAs MMIC,

processed on Agilent’s cost effec-

tive PHEMT (Pseudomorphic High

Electron Mobility Transistor). It is

housed in the SOT343 (SC70 4-lead)

package, and is part of the Agilent

Technologies CDMAdvantage RF

chipset.

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