VG111
Product Features
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PCS/UMTS-band Variable Gain Amplifier
Product Description
The VG111 is a PCS / UMTS-band high dynamic range
variable gain amplifier (VGA) packaged in a low profile Pb-
free / RoHS-compliant surface-mount leadless package that
measures 6 x 6 mm square.
The +22 dBm output compression point and +39.5 dBm
output intercept point of the amplifier are maintained over
the entire attenuation range, making the VG111 ideal for
use in transmitter and receiver AGC circuits and as a
variable gain stage following an LNA in high dynamic
range receiver front ends.
Superior thermal design allows the product to have a
minimum MTTF rating of 1000 years at a mounting
temperature of +85º C. All devices are 100% RF & DC
tested and packaged on tape and reel for automated surface-
mount assembly.
Functional Diagram
Gain Ctrl
GND
GND
GND
7
GND 8
GND 9
GND 10
RF IN 11
GND 12
GND 13
GND 14
15
GND
16
GND
17
GND
18
GND
19
GND
20
GND
21
GND
6
GND
GND
2
5
4
3
GND
1
28 GND
27 GND
26 GND
25 RF OUT
24 GND
23 GND
22 GND
1700 – 2200 MHz bandwidth
26.6 dB Attenuation Range
+39.5 dBm Output IP3
+22 dBm P1dB
Constant IP3 & P1dB over
attenuation range
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Single voltage supply
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Pb-free 6mm 28-pin QFN package
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MTTF > 1000 years
Amp
Variable
Attenuator
Applications
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Xmit & Rcv AGC circuitry for
mobile infrastructure
Specifications
(1)
Parameter
Operational Bandwidth
Test Frequency
Gain at min. attenuation
Input Return Loss
Output Return Loss
Output P1dB
Output IP3
Noise Figure at min. attenuation
Test Frequency
Gain at min. attenuation
Input Return Loss
Output Return Loss
Output P1dB
Output IP3
Noise Figure at min. attenuation
Gain Variation Range
Gain Variation Control Voltage, V
CTRL
Group Delay
Supply Voltage
Operating Amplifier Current Range
Gain Control Pin Current
Units
MHz
MHz
dB
dB
dB
dBm
dBm
dB
MHz
dB
dB
dB
dBm
dBm
dB
dB
V
ns
V
mA
mA
Min
1700
12
Typ
1900
14
12
11
+22
+39.5
4.3
2140
13.3
14
14
+22
+39.5
4.5
26.6
0.6
+5
150
Max
2200
See note 1
Conditions
+37
See note 2
V
CTRL
= 0 V
See note 1
23.5
0
32.5
4.5
See note 2
V
CTRL
= 0 V
See note 3
See note 1
120
180
20
Pin 25
V
CTRL
= 4.5 V. See note 1.
1. Test conditions unless otherwise noted: 25ºC, Vdd = +5 V in a tuned application circuit. Vctrl is the control voltage through a BJT transistor and a 100
Ω
dropping resistor as shown in the same application circuit.
2. 3OIP measured with two tones at an output power of +5 dBm/tone separated by 10 MHz. The suppression on the largest IM3 product is used to calculate the 3OIP using a 2:1 rule.
3. The gain variation range is measured as the difference in gain with Vctrl = 0V and Vctrl = 4.5V at 1.9 GHz.
Absolute Maximum Rating
Parameter
Operating Case Temperature
Storage Temperature
Amplifier Supply Voltage (pin 25)
Pin 5 (Gain Control) Current
RF Input Power (continuous)
Junction Temperature
-40 to +85
°C
-55 to +125
°C
+6 V
30 mA
+12 dBm
+220° C
Rating
Ordering Information
Part No.
VG111-F
VG111-PCB1900
VG111-PCB2100
Description
PCS/UMTS-band Variable Gain Amplifier
(lead-free/RoHS-compliant QFN package)
1.8 – 2.0 GHz Fully Assembled Application Board
2.0 – 2.2 GHz Fully Assembled Application Board
Specifications and information are subject to change without notice
Operation of this device above any of these parameters may cause permanent damage.
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 1 of 6
January 2007
WJCI [ WJ COMMUNICATION. INC. ]
