VG111
The Communications Edge
TM
Product Information
PCS/UMTS-band Variable Gain Amplifier
Application Circuit: 1.8 – 2.0 GHz (VG111-PCB1900)
Circuit Board Material: .014” FR-4, 4 layers, .062” total thickness
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•
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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.
Distances are shown from the edge-to-edge for the land pattern.
Ref. Des.
C1, C7
C2, C5
C3, C4
C6
L1, L2
R1
R2
Q1
U1
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
100
Ω
Chip Resistor
2.2
Ω
Chip Resistor
MMBT2222 Motorola Transistor
VG111 Variable Gain Amplifier
Size
0603
0603
0603
0603
0603
0603
SOT-23
QFN 6x6
OIP3 vs. Output Power
45
40
35
30
25
-4
0
+25C
-40C
12
+85C
16
frequency = 1900, 1901 MHz, 0dB Atten.
OIP3 vs. Attenuation Setting
45
40
35
frequency = 1900, 1901 MHz, +10 dBm/tone, +25° C
ACPR vs. Channel Power
-40
1960 MHz, IS-95, 9 Ch. Forward, ±885 kHz offset, 30 kHz Meas BW, 25°C
-50
0dB Attn
2.5dB Attn
5dB Attn
10dB Attn
-60
30
25
0
2
4
6
Attenuation (dB)
8
10
-70
10
11
12
13
14
15
16
4
8
Output Power (dBm)
Output Channel Power (dBm)
Normalized Gain vs. Pin 5 Control Current
Gain vs. Pin 5 Attn. Control Current
20
15
10
5
0
-5
-10
-15
-20
0
5
10
15
20
25
Pin 5 Attenuation Control Current (mA)
+25°C
-40°C
+85°C
35
30
25
20
15
10
5
0
0.1
1.0
10.0
100.0
Pin 5 Attenuation Control Current (mA)
+25°C
-40°C
+85°C
Specifications and information are subject to change without notice
WJ Communications, Inc
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Phone 1-800-WJ1-4401
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FAX: 408-577-6621
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e-mail: sales@wj.com
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Web site: www.wj.com
Page 2 of 7
February 2006
WJCI [ WJ COMMUNICATION. INC. ]
