12 - 2

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

Relative Gain Setting

(Referenced to Maximum Gain State)

(Only Major States are Shown)

Gain vs. Frequency

Input Return Loss

(Only Major States are Shown)

Output Return Loss

(Only Major States are Shown)

HMC681LP5 / 681LP5E

v03.1010

0.5 dB LSB GaAs MMIC 6-BIT DIGITAL VARIABLE

GAIN AMPLIFIER w/ SERIAL CONTROL, DC - 1 GHz

0

5

10

15

20

25

30

35

40

45

50

0.05

0.1

0.15

0.2

0.25

0.3

0.35

+25C

+85C

-40C

FREQUENCY (GHz)

-40

-35

-30

-25

-20

-15

-10

-5

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

FREQUENCY (GHz)

31.5dB

2dB

-40

-35

-30

-25

-20

-15

-10

-5

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

FREQUENCY (GHz)

31.5dB

I.L

-35

-30

-25

-20

-15

-10

-5

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

FREQUENCY (GHz)

31.5 dB

16 dB

8 dB

Bit Error vs. Frequency

(Only Major States are Shown)

Bit Error vs. Relative Gain Setting

-2

-1.5

-1

-0.5

0

0.5

1

1.5

2

0

4

8

12

16

20

24

28

32

RELATIVE GAIN SETITING (dB)

350MHz

150, 200MHz

-2

-1.5

-1

-0.5

0

0.5

1

1.5

2

0.05

0.1

0.15

0.2

0.25

0.3

0.35

FREQUENCY (GHz)

0.5dB

16dB

31.5dB

50 to 350 MHz Tuning