VG025
S21 vs. Frequency
Vctrl=0V (Minimum attenuation)
The Communications Edge
TM
Product Information
High Linearity Variable Gain Amplifier
240 MHz Circuit Performance (VG025-PCB240)
S22 vs. Frequency
Vctrl=0V (Minimum attenuation)
S11 vs. Frequency
Vctrl=0V (Minimum attenuation)
20
18
0
-5
S22 (dB)
-10
-15
-20
-40 °C
+25 °C
260
280
S11 (dB)
0
-5
-10
-15
-20
S21 (dB)
16
14
12
+85 °C
300
-40 °C
+25 °C
+85 °C
-40 °C
-25
200
220
240
+25 °C
260
+85 °C
280
300
10
200
220
240
-25
200
220
240
260
280
300
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
15
10
S21 (dB)
S11 (dB)
5
0
-5
-10
-15
200
Vctrl=0.000V
Vctrl=1.844V
Vctrl=0.784V
Vctrl=4.230V
Vctrl=1.133V
0
-5
S22 (dB)
-10
-15
-20
-25
-30
200
Vctrl=0.000V
Vctrl=1.133V
Vctrl=4.230V
Vctrl=0.784V
Vctrl=1.844V
0
Vctrl=0.000V
Vctrl=0.784V
Vctrl=1.844V
-5
-10
-15
-20
-25
-30
200
Vctrl=1.133V
Vctrl=4.230V
220
240
260
280
300
220
240
260
280
300
220
240
260
280
300
Frequency (MHz)
P1dB vs. Frequency
Vctrl=0V (Minimum attenuation)
Frequency (MHz)
Phase change vs. Attenuation
25 °C, 240 MHz
Frequency (MHz)
Noise Figure vs. Frequency
Vctrl=0V (Minimum attenuation)
26
50
phase change (deg)
40
NF (dB)
6
5
4
3
2
1
220
24
P1dB (dBm)
22
20
18
30
20
10
0
-40 °C
16
230
235
+25 °C
240
+85 °C
245
250
-40 °C
230
240
+25 °C
250
+85 °C
260
0
4
Frequency (MHz)
8
12
16
Attenuation (dB)
20
24
Frequency (MHz)
OIP3 vs. Attenuation Setting
45
OIP3 (dBm)
40
35
30
25
0
2
4
6
Attenuation (dB)
25 °C, 240 MHz
frequency = 240, 241 MHz, +5 dBm/tone, +25 °C
OIP3 vs. Output Power
45
40
35
30
25
8
10
-4
+25 °C
+85 °C
0
-40 °C
frequency = 240, 241 MHz, 0dB Atten.
IMD products vs. Output Power
-40
IMD products (dBc)
-60
-80
-100
-120
fundamental frequency = 240, 241 MHz; +25 °C, 0dB Atten
IMD_Low
IMD_High
OIP3 (dBm)
4
8
Output Power (dBm)
Normalized Gain vs. Vctrl
25 °C, 240 MHz
12
16
-4
0
4
8
Output Power (dBm)
Ictrl vs. Vctrl
25 °C
12
16
Gain vs. Pin 8 Attn. Control Current
15
Normalized Gain (dB)
10
Gain (dB)
5
0
-5
-10
0
5
10
15
20
25
Pin 8 Attenuation Control Current (mA)
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 3 of 7
January 2006
WJCI [ WJ COMMUNICATION. INC. ]
