The Communications Edge TM
VG101
Cellular-band Variable Gain Amplifier
Product Information
Application Circuit: 750 – 1000 MHz (VG101-PCB)
Circuit Board Material: .014” FR-4, 4 layers, .062” total thickness
•
•
The amplifier is biased through Pin 25 and should be connected
directly into a voltage regulator.
Distances are shown from the edge-to-edge for the land pattern.
Bill of Materials
Ref. Des. Description
Size
C1, C3 47 pF Chip Capacitor
0603
0603
0603
0603
0603
0603
0603
0603
0603
0603
0603
C2, C4
C5
0.01 μF Chip Capacitor
1 pF Chip Capacitor
82 nH Chip Inductor
39 nH Chip Inductor
2.7 nH Chip Inductor
8.2 nH Chip Inductor
100 Ω Chip Resistor
2.7 Ω Chip Resistor
4.7 Ω Chip Resistor
47 Ω Chip Resistor
L1
L2
L3
L4
R1
R3
R4
R5
Q1
U1
MMBT2222 Motorola Transistor SOT-23
VG101 Variable Gain Amplifier
QFN 6x6
OIP3 vs. Output Power
frequency = 900, 910 MHz, 0dB Atten.
ACPR vs. Channel Power
9 Ch. Forward, ±885 kHz offset, 30 kHz Meas BW, 25°C
OIP3 vs. Attenuation Setting
frequency = 900, 910 MHz, 25C, 10 dBm/tone
880 MHz, IS-95,
45
40
35
30
25
-40
-50
-60
-70
45
40
35
30
25
0dB Attn
5dB Attn
10dB Attn
+25C
-40C
+85C
12
13
14
15
16
-4
0
4
8
12
16
0
2
4
6
8
10
Output Power (dBm)
Output Channel Power (dBm)
Attenuation (dB)
Specifications and information are subject to change without notice
Page 2 of 5 June 2005
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. ]
