Specifications and information are subject to change without notice

WJ Communications, Inc

• Phone 1-800-WJ1-4401 • FAX: 408-577-6621 • e-mail: sales@wj.com • Web site: www.wj.com

Page 5 of 7

January 2006

VG025

High Linearity Variable Gain Amplifier

Product Information

The Communications Edge

TM

1960 MHz Circuit Performance (VG025-PCB2000)

S21 vs. Frequency vs. Control Voltage

-10

-5

0

5

10

1700

1750

1800

1850

1900

1950

2000

Frequency (MHz)

Vctrl=0.00V

Vctrl=0.82V

Vctrl=1.15V

Vctrl=1.72V

Vctrl=4.50V

S11 vs. Frequency vs. Control Voltage

-25

-20

-15

-10

-5

0

1700

1750

1800

1850

1900

1950

2000

Frequency (MHz)

Vctrl=0.00V

Vctrl=0.82V

Vctrl=1.15V

Vctrl=1.72V

Vctrl=4.50V

S22 vs. Frequency vs. Control Voltage

-25

-20

-15

-10

-5

0

1700

1750

1800

1850

1900

1950

2000

Frequency (MHz)

Vctrl=0.00V

Vctrl=0.82V

Vctrl=1.15V

Vctrl=1.72V

Vctrl=4.50V

P1dB vs. Frequency

Vctrl=0V (Minimum attenuation)

16

18

20

22

24

26

1700

1800

1900

2000

2100

2200

Frequency (MHz)

Phase change vs. Attenuation

25 °C, 1900 MHz

-20

-10

0

10

20

0

2

4

6

8

101214

Attenuation (dB)

Noise Figure vs. Frequency

Vctrl=0V (Maximum Gain Setting)

4

5

6

7

8

9

1700

1800

1900

2000

2100

2200

Frequency (MHz)

OIP3 vs. Attenuation Setting

frequency = 1960, 1961 MHz, +5 dBm/tone, +25 °C

25

30

35

40

45

024

68

10

Attenuation (dB)

OIP3 vs. Output Power

frequency = 1900, 1961 MHz, 0dB Atten.

25

30

35

40

45

-4

0

4

8

12

16

Output Power (dBm)

+25 °C

-40 °C

+85 °C

IMD products vs. Output Power

fundamental frequency = 800, 801 MHz; +25 °C, 0dB Atten

-120

-100

-80

-60

-40

-4

0

4

8

12

16

Output Power (dBm)

IMD_Low

IMD_High

Gain vs. Pin 8 Attn. Control Current

25 °C, 1900 MHz

-6

-4

-2

0

2

4

6

8

10

0

5

10

15

20

25

Pin 8 Attenuation Control Current (mA)

Normalized Gain vs. Vctrl

25 °C, 1900 MHz

-14

-12

-10

-8

-6

-4

-2

0

0

12345

Vctrl (V)

Ictrl vs. Vctrl

25 °C

0

5

10

15

20

25

30

0

1234

5

Vctrl (V)