VG025
20
15
10
S21 (dB)
The Communications Edge
TM
Product Information
High Linearity Variable Gain Amplifier
800 MHz Circuit Performance (VG025-PCB800)
S21 vs. Frequency vs. Control Voltage
S11 vs. Frequency vs. Control Voltage
S22 vs. Frequency vs. Control Voltage
0
-5
S11 (dB)
S22 (dB)
Vctrl=0.00V
Vctrl=1.73V
Vctrl=0.78V
Vctrl=4.50V
Vctrl=1.10V
0
-5
-10
-15
-20
-25
-30
700
Vctrl=0.00V
Vctrl=1.73V
Vctrl=0.78V
Vctrl=4.50V
Vctrl=1.10V
-10
-15
-20
-25
-30
700
5
0
-5
-10
-15
700
Vctrl=0.00V
Vctrl=1.73V
Vctrl=0.78V
Vctrl=4.50V
Vctrl=1.10V
800
900
1000
800
900
1000
800
900
1000
Frequency (MHz)
P1dB vs. Frequency
Vctrl=0V (Minimum attenuation)
Frequency (MHz)
Phase change vs. Attenuation
25 °C, 800 MHz
Frequency (MHz)
Noise Figure vs. Frequency
Vctrl=0V (Maximum Gain Setting)
26
24
P1dB (dBm)
22
20
18
80
phase change (deg)
60
7
6
NF (dB)
5
4
3
700
40
20
0
-40 °C
16
700
+25 °C
800
+85 °C
900
1000
0
4
Frequency (MHz)
8
12
Attenuation (dB)
16
20
800
900
1000
Frequency (MHz)
IMD products vs. Output Power
-40
fundamental frequency = 240, 241 MHz; +25 °C, 0dB Atten
OIP3 vs. Attenuation Setting
45
frequency = 800, 801 MHz, +5 dBm/tone, +25 °C
OIP3 vs. Output Power
45
40
35
30
+25 °C
-40 °C
+85 °C
-120
-4
0
4
8
Output Power (dBm)
Normalized Gain vs. Vctrl
25 °C, 800 MHz
frequency = 800, 801 MHz, 0dB Atten.
OIP3 (dBm)
35
30
25
0
2
4
6
Attenuation (dB)
8
10
OIP3 (dBm)
40
IMD products (dBc)
-60
-80
-100
IMD_Low
IMD_High
25
12
16
-4
0
4
8
Output Power (dBm)
12
16
Gain vs. Pin 8 Attn. Control Current
25 °C, 800 MHz
Ictrl vs. Vctrl
25 °C
16
12
Gain (dB)
8
4
0
-4
-8
0
5
10
15
20
25
Pin 8 Attenuation Control Current (mA)
Normalized Gain (dB)
0
-4
30
25
Ictrl (mA)
20
15
10
5
0
0
1
2
Vctrl (V)
3
4
5
-8
-12
-16
-20
-24
0
1
2
Vctrl (V)
3
4
5
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 4 of 7
January 2006
WJCI [ WJ COMMUNICATION. INC. ]
