The Communications Edge TM
VG111
PCS/UMTS-band Variable Gain Amplifier
Product Information
Application Circuit: 2.0 – 2.2 GHz (VG111-PCB2100)
Circuit Board Material: .014” FR-4, 4 layers, .062” total thickness
Bill of Materials
Description
Ref. Des.
C1, C7
C2
C3, C4
C5
Size
47 pF Chip Capacitor
0.2 pF Chip Capacitor
0.01 μF Chip Capacitor
0.6 pF Chip Capacitor
Do Not Place
0603
0603
0603
0603
C6
•
•
•
•
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
R2
22 nH Chip Inductor
100 Ω Chip Resistor
2.2 Ω Chip Resistor
0603
0603
0603
Distances are shown from the edge-to-edge for the land pattern.
Q1
U1
MMBT2222 Motorola Transistor
VG111 Variable Gain Amplifier
SOT-23
QFN 6x6
ACPR vs. Channel Power
+ 64 DPCH, ±5 MHz offset, 25°C
OIP3 vs. Output Power
frequency = 2140, 2141 MHz, 0dB Atten.
OIP3 vs. Attenuation
frequency = 2140, 2141 MHz, +10 dBm/tone, +25° C
2140 MHz, 3GPP W-CDMA, Test Model 1
-40
-45
-50
-55
-60
45
40
35
30
25
45
40
35
30
25
0dB Attn
2.5dB Attn
5dB Attn
10dB Attn
+25C
-40C
+85C
11
12
13
14
15
-4
0
4
8
12
16
0
2
4
6
8
10
Output Power (dBm)
Attenuation (dB)
Output Channel Power (dBm)
Gain vs. Pin 5 Attn. Control Current
+25°C -40°C +85°C
Normalized Gain vs. Pin 5 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 4 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. ]
