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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

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v03.1010

Functional Diagram

the HmC681lp5(e) is ideal for:

• if & rf applications

• Cellular/3g infrastructure

• Wibro / WimaX / 4g

• microwave radio & Vsat

• test equipment and sensors

+13.5 db to +45 db gain Control in 0.5 db steps

High Output ip3: +36 dbm

±0.25 db typical gain step error

single +5V supply

the HmC681lp5(e) is a digitally controlled variable

gain amplifier which operates from dC to 1 gHz,

and can be programmed to provide anywhere from

13.5 db, to 45 db of gain, in 0.5 db steps. the

HmC681lp5(e) delivers noise figure of 2.8 db in its

maximum gain state, with output ip3 of up to +36

dbm in any state. this serially controlled digital Vga

incorporates off chip aC ground capacitors for near

dC operation, making it suitable for a wide variety of

rf and if applications. the HmC681lp5(e) is housed

in a roHs compliant 5x5 mm Qfn leadless package,

and provides the user with a highly integrated solution.

this functionality is also available with parallel control

as the HmC626lp5(e).

parameter

min.

typ.

max.

min.

typ.

max.

Units

50 - 350

350 - 1000

mHz

gain (maximum gain state)

40

45

30

40

db

gain Control range

31.5

31.5

db

input return loss

25

30

db

Output return loss

20

17

db

gain setting accuracy:

(referenced to maximum gain state)

all gain states

± (0.15 + 3% of relative gain setting) max. ± (0.15 + 3% of relative gain setting) max.

db

Output power for 1 db Compression

20

19

dbm

Output third Order intercept point

(two-tone Output power= 5 dbm each tone)

38

36

dbm

noise figure

2.7

2.8

db

switching Characteristics

trise, tfall (10/90% rf)

tOn, tOff (50% Ctl to 10/90% rf)

60

120

60

120

ns

ns

total supply Current

176

225

176

225

ma

Typical Applications

Features

General Description

0.5 dB LSB GaAs MMIC 6-BIT DIGITAL VARIABLE GAIN

AMPLIFIER w/ SERIAL CONTROL, DC - 1 GHz