For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824

Phone: 978-250-3343

Fax: 978-250-3373

Order On-line at www.hittite.com

Application Support: Phone: 978-250-3343 or apps@hittite.com

7

7 - 1

GaAs PHEMT MMIC LNA w/

FAILSAFE BYPASS MODE, 700 - 1200 MHz

v03.0610

General Description

Features

Functional Diagram

The HmC668lp3(e) is a versatile, high dynamic range

GaAs mmiC low Noise Amplifier that integrates a low

loss lNA bypass mode on the iC. The amplifier is ide-

al for receivers and lNA modules operating between

0.7 and 1.2 GHz and provides 0.9 dB noise figure,

16 dB of gain and +33 dBm ip3 from a single supply

of +5V @ 57mA. input and output return losses are

excellent and no external matching components are

required. A single control line is used to switch be-

tween lNA mode and a low loss bypass mode. The

failsafe topology enables the lNA bypass path, when

no DC power is available. The HmC668lp3(e) offers

improved noise figure versus the previously released

HmC373lp3(e).

Noise figure: 0.9 dB

output ip3: +33 dBm

Gain: 16 dB

failsafe operation:

Bypass is enabled when lNA is unpowered

single supply: +3V or +5V

Typical Applications

The HmC668lp3(e) is ideal for:

• Cellular/3G and lTe/wimAX/4G

• BTs & infrastructure

• repeaters and femtocells

• Tower mounted Amplifiers

• Test & measurement equipment

parameter

lNA mode

Bypass mode

failsafe mode

Units

Vdd = +3V

Vdd = +5V

min.

Typ.

max.

min.

Typ.

max.

min.

Typ.

max.

min.

Typ.

max.

frequency range

0.7 - 1.2

0.7 - 1.2

0.7 - 1.2

0.7 - 1.2

GHz

Gain

12

15

13

16

-2.5

-1.5

-2.5

-1.5

dB

Gain Variation over Temperature

0.03

0.016

0.0008

0.0008

dB / °C

Noise figure

0.85

1.1

0.9

1.1

dB

input return loss

12

13

12

12

dB

output return loss

13

14

13

13

dB

reverse isolation

22

23

-

-

dB

power for 1dB Compression

13

13

22

24

dBm

27

33

26

26

dBm

supply Current (idd)

32

40

57

70

0.05

-

mA

switching speed (90% -10%)

lNA mode to Bypass mode

Bypass mode to lNA mode

200

-

ns

ns

85

85

[1] p1dB for lNA mode is referenced to rfoUT while p1dB for Bypass and failsafe modes are referenced to rfiN.

[2] ip3 for lNA mode is referenced to rfoUT while ip3 for Bypass and failsafe modes are referenced to rfiN.