The Communications Edge TM
VG111
PCS/UMTS-band Variable Gain Amplifier
Product Information
Application Circuit: 1.8 – 2.0 GHz (VG111-PCB1900)
Circuit Board Material: .014” FR-4, 4 layers, .062” total thickness
Bill of Materials
Description
47 pF Chip Capacitor
Do Not Place
0.01 μF Chip Capacitor
0.5 pF Chip Capacitor
22 nH Chip Inductor
Ref. Des.
C1, C7
C2, C5
C3, C4
C6
Size
0603
0603
0603
0603
0603
•
•
•
•
Pins 7, 19, and 21 should not be connected.
The amplifier is biased through Pin 25 and should be connected directly into a voltage regulator.
DNP represents Do Not Place.
L1, L2
R1
100 Ω Chip Resistor
R2
Q1
U1
0603
SOT-23
QFN 6x6
2.2 Ω Chip Resistor
MMBT2222 Motorola Transistor
VG111 Variable Gain Amplifier
Distances are shown from the edge-to-edge for the land pattern.
ACPR vs. Channel Power
OIP3 vs. Output Power
frequency = 1900, 1901 MHz, 0dB Atten.
OIP3 vs. Attenuation Setting
frequency = 1900, 1901 MHz, +10 dBm/tone, +25° C
1960 MHz, IS-95, 9 Ch. Forward, ±885 kHz offset, 30 kHz Meas BW, 25°C
-40
-50
-60
-70
45
40
35
30
25
45
40
35
30
25
0dB Attn
2.5dB Attn
5dB Attn
10dB Attn
+25C
-40C
+85C
10
11
12
13
14
15
16
-4
0
4
8
12
16
0
2
4
6
8
10
Output Power (dBm)
Attenuation (dB)
Output Channel Power (dBm)
Normalized Gain vs. Pin 5 Control Current
+25°C -40°C +85°C
Gain vs. Pin 5 Attn. Control Current
+25°C -40°C +85°C
20
15
10
5
35
30
25
20
15
10
5
0
-5
-10
-15
-20
0
0
5
10
15
20
25
0.1
1.0
10.0
100.0
Pin 5 Attenuation Control Current (mA)
Pin 5 Attenuation Control Current (mA)
Specifications and information are subject to change without notice
Page 2 of 7 February 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. ]
