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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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v03.0609

Functional Diagram

the HmC680lp4(e) is a digitally controlled variable

gain amplifier which operates from 30 to 400 mHz,

and can be programmed to provide -4 db to +19 db

of gain, in 1 db steps. the HmC680lp4(e) delivers

noise figure of 5 db in its maximum gain state, with

output ip3 of up to +40 dbm in any state. this high

linearity dVga also provides a differential rf output

which can be used to interface directly with saW

filters in tx and rx applications, and with digital to

analog converters in rx chains. the HmC680lp4(e)

is housed in a roHs compliant 4x4 mm Qfn leadless

package, and is CmOs/ ttl compatible.

Typical Applications

Features

General Description

BiCMOS MMIC 5-BIT DIGITAL

VARIABLE GAIN AMPLIFIER, 30 - 400 MHz

parameter

min.

typ.

max.

Units

frequency range

30 - 400

mHz

gain (maximum gain state)

17

19

db

gain Control range

23

db

input return loss

12

db

Output return loss

13

db

gain accuracy: (referenced to maximum gain state) all gain states

± (0.15 + 3% of gain setting) max.

db

Output power for 1db Compression

23

25

dbm

40

dbm

65

dbm

Harmonics

2nd Order

3rd Order

70

75

dbc

dbc

step accuracy (referenced to maximum gain state)

±0.2

db

noise figure (max gain state)

5

db

switching Characteristics

trise, tfall (10/90% rf)

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

11

13

ns

ns

Control supply Current idd

4

5

ma

amp supply Current (rfOUtp)

122

135

ma

amp supply Current (rfOUtn)

122

135

ma

[1] test frequency 50 mHz

the HmC680lp4(e) is ideal for:

• Cellular/3g infrastructure

• Wibro / WimaX / 4g

• microwave radio & Vsat

• test equipment and sensors

• if & rf applications

ttl/CmOs compatible parallel or latched

parallel control interface

High Output ip3: +40 dbm (at all gain settings)

low noise figure: 5 db

Wide gain Control range: 23 db

excellent state & step accuracy (±0.05 db)