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 3 of 4

May 2006

VG112

PCS/UMTS-band Variable Gain Amplifier

Product Information

The Communications Edge

TM

2140 MHz Application Circuit Performance

Performance using the circuitry on the VG112-PCB Evaluation Board

OIP3 vs. Output Power vs. Temperature

frequency = 2140, 2141 MHz, 0dB Atten.

38

40

42

44

46

48

10

12

14

16

18

20

Output Power per tone (dBm)

+25 °C

-40 °C

+85 °C

OIP3 vs. Output Power vs. Temperature

frequency = 2140, 2141 MHz, 5dB Atten.

38

40

42

44

46

48

10

12

14

16

18

20

Output Power per tone (dBm)

+25 °C

-40 °C

+85 °C

OIP3 vs. Output Power vs. Temperature

frequency = 2140, 2141 MHz, 10dB Atten.

38

40

42

44

46

48

10

12

14

16

18

20

Output Power per tone (dBm)

+25 °C

-40 °C

+85 °C

OIP3 vs. Output Power vs. Temperature

frequency = 2140, 2141 MHz, 15dB Atten.

38

40

42

44

46

48

10

12

14

16

18

20

Output Power per tone (dBm)

+25 °C

-40 °C

+85 °C

OIP3 vs. Pout vs. Attenuation Setting

frequency = 2140, 2141 MHz, +25 °C

38

40

42

44

46

48

10

12

14

16

18

20

Output Power per tone (dBm)

0 dB Atten

5 dB Atten

10 dB Atten

15 dB Atten

IMD products vs. Output Power

fundamental frequency = 2140, 2141 MHz; +25 °C, 0dB Atten

-80

-70

-60

-50

-40

10

12

14

16

18

20

Output Power per tone (dBm)

IMD_Low

IMD_High

P1dB vs. Temperature

frequency = 2140 MHz, 0dB Atten.

22

24

26

28

30

32

-40

-15

10

35

60

85

Temperature (°C)

ACLR vs. Channel Power

3GPP W-CDMA, Test Model 1+64 DPCH, ±5 MHz offset, 2140 MHz

-60

-55

-50

-45

-40

18

19

20

21

22

Output Channel Power (dBm)

-40 C

+25 C

+85 C

Gain vs. Vctrl

2140 MHz

-10

0

10

20

30

0

123

45

Vctrl (V)

25 °C

-40 °C

85 °C

Normalized Gain vs. Vctrl

2140 MHz

-30

-25

-20

-15

-10

-5

0

0

123

45

Vctrl (V)

25 °C

-40 °C

85 °C

Noise Figure vs. Frequency vs. Temperature

Vctrl=0V (Maximum Gain Setting)

5

6

7

8

9

10

1800

1900

2000

2100

2200

Frequency (MHz)

-40 °C

+25 °C

+85 °C