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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

12

HMC708LP5 / 708LP5E

v03.0409

Functional Diagram

Typical Applications

Features

General Description

0.5 dB LSB 6-BIT DIGITAL

VARIABLE GAIN AMPLIFIER, 1700 - 2200 MHz

the HmC708lp5(e) is ideal for:

• Cellular infrastructure

• Wibro, WimaX and lte/ 4g

• microwave radio & Vsat

• test equipment and sensors

-2.5 to +29 db gain Control in 0.5 db steps

power-up state selection

High Output ip3: +37 dbm

low noise figure: 1 db

ttl/CmOs Compatible

serial, parallel, or latched parallel Control

±0.25 db typical step error

single +3V and +5V supply

the HmC708lp5(e) is a digitally controlled variable

gain amplifier which operates from 1700 mHz and

2200 gHz, and can be programmed to provide

between 2.5 db attenuation and +29 db of gain, in

0.5 db steps. the HmC708lp5(e) delivers noise

figure of 1 db in its maximum gain state, with output

ip3 of up to +37 dbm. the dual mode gain control

interface accepts either three wire serial input or

6 bit parallel word. the HmC708lp5(e) also features

a user selectable power up state and a serial

output for cascading other Hittite serially controlled

components. for 900 mHz applications please refer

to the HmC707lp5(e) data sheet.

Rbias = 270 Ohms for Vdd = +5V, Rbias = 10 kOhms for Vdd = +3V, Vdd = Vdd1 = Vdd2 = Vdd3

parameter

min.

typ.

max.

min.

typ.

max.

Units

Vdd = +3V

Vdd = +5V

frequency range

1.7 - 2.2

1.7 - 2.2

gHz

gain (maximum gain state)

23

27

25

30

db

gain Control range

31.5

31.5

db

input return loss

16.5

20.5

db

Output return loss

10.5

13.5

db

attenuation accuracy: (referenced to maximum gain state)

±(0.3 + 8%) of attenuation setting

±(0.2 + 5%) of attenuation setting

db

Output power for 1 db Compression

13

16

18

21.5

dbm

Output third Order intercept point

(two-tone input power= -10 dbm each tone)

32.5

37.5

dbm

noise figure

1.1

1

db

switching Characteristics

trise, tfall (50% Ctl to 90% rf)

trise

tfall

-

-

140

270

ns

ns

Current amplifier 1

30

47

65

80

97

135

ma

Current amplifier 2

130

155

190

130

155

190

ma

[1] two-tone output power @ -10 dbm [2] two-tone output power @ -5 dbm