The Communications Edge TM
VG025
High Linearity Variable Gain Amplifier
Product Information
240 MHz Circuit Performance (VG025-PCB240)
S21 vs. Frequency
Vctrl=0V (Minimum attenuation)
S22 vs. Frequency
Vctrl=0V (Minimum attenuation)
S11 vs. Frequency
Vctrl=0V (Minimum attenuation)
0
-5
20
18
16
14
12
10
0
-5
-10
-15
-20
-25
-10
-15
-20
-25
-40 °C
240
+25 °C
260
+85 °C
280 300
-40 °C
240
+25 °C
260
+85 °C
280 300
-40 °C
+25 °C
+85 °C
300
200
220
200
220
240
260
280
200
220
Frequency (MHz)
Frequency (MHz)
S11 vs. Frequency vs. Control Voltage
Frequency (MHz)
S21 vs. Frequency vs. Control Voltage
S22 vs. Frequency vs. Control Voltage
20
0
-5
0
-5
Vctrl=0.000V
Vctrl=1.133V
Vctrl=4.230V
Vctrl=0.784V
Vctrl=1.844V
15
10
5
-10
-15
-20
-25
-30
-10
-15
-20
-25
-30
0
Vctrl=0.000V
Vctrl=1.133V
Vctrl=4.230V
Vctrl=0.784V
Vctrl=1.844V
-5
Vctrl=0.000V
Vctrl=1.844V
Vctrl=0.784V
Vctrl=4.230V
Vctrl=1.133V
-10
-15
200
220
240
260
280
300
200
220
240
260
280
300
200
220
240
260
280
300
Frequency (MHz)
Frequency (MHz)
Frequency (MHz)
P1dB vs. Frequency
Vctrl=0V (Minimum attenuation)
Noise Figure vs. Frequency
Vctrl=0V (Minimum attenuation)
Phase change vs. Attenuation
25 °C, 240 MHz
50
40
30
20
10
0
6
5
4
3
2
1
26
24
22
20
18
16
-40 °C
+25 °C
+85 °C
-40 °C
235
+25 °C
+85 °C
230
240
Frequency (MHz)
245
250
220
230
240
Frequency (MHz)
250
260
0
-4
0
4
8
12
16
20
24
16
5
Attenuation (dB)
IMD products vs. Output Power
fundamental frequency = 240, 241 MHz; +25 °C, 0dB Atten
OIP3 vs. Attenuation Setting
frequency = 240, 241 MHz, +5 dBm/tone, +25 °C
OIP3 vs. Output Power
frequency = 240, 241 MHz, 0dB Atten.
-40
-60
45
40
35
30
25
45
40
35
30
25
IMD_Low
IMD_High
-80
-100
-120
+25 °C
0
-40 °C
0
2
4
6
8
10
4
8
12
-4
0
4
8
12
16
Attenuation (dB)
Output Power (dBm)
Output Power (dBm)
Gain vs. Pin 8 Attn. Control Current
25 °C, 240 MHz
Normalized Gain vs. Vctrl
25 °C, 240 MHz
Ictrl vs. Vctrl
25 °C
15
10
5
0
30
25
20
15
10
5
-4
-8
-12
-16
-20
-24
0
-5
0
-10
0
1
2
3
4
5
0
5
10
15
20
25
1
2
3
4
Vctrl (V)
Pin 8 Attenuation Control Current (mA)
Vctrl (V)
Specifications and information are subject to change without notice
Page 3 of 7 January 2006
WJ Communications, Inc • Phone 1-800-WJ1-4401 • FAX: 408-577-6621 • e-mail: sales@wj.com • Web site: www.wj.com
WJCI [ WJ COMMUNICATION. INC. ]
