Specifications and information are subject to change without notice
WJ Communications, Inc • Phone 1-800-WJ1-4401 • FAX: 408-577-6621 • e-mail: sales@wj.com • Web site: www.wj.com August 2004
VG111
PCS/UMTS-band Variable Gain Amplifier Product Information
The Communications Ed
e TM
Product Features
• 1800 – 2200 MHz bandwidth
• 29 dB Attenuation Range
• +39 dBm Output IP3
• +22 dBm P1dB
• Constant IP3 & P1dB over
attenuation range
• Single voltage su pply
• 6x6 mm 28-pin QFN package
• MTTF > 1000 years
Applications
• Xmit & Rcv AGC circuitry for
mobile infrastructure
Product Description
The VG111 is a PCS / UMTS-band high dynamic range
variable gain amplifier (VGA) packaged in a 6x6 mm
surface-mount package. The +22 dBm output
compression point and +39 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
Function Pin No
Gain Control 5
No Connect 7, 19, 21
RF Input 11
RF Output / DC bias 25
Ground All other pins
Backside copper
Specifications (1)
Parameter Units Min Typ Max Conditions
Test Frequency MHz 1900 See note 1
Gain at min. attenuation dB 12.5 14
Input Return Loss dB 12
Output Return Loss dB 11
Output P1dB dBm +22
Output IP3 dBm +37 +39 See note 2
Noise Figure at min. attenuation dB 3.5 VCTRL = 0 V
Test Frequency MHz 2140 See note 1
Gain at min. attenuation dB 13.3
Input Return Loss dB 14
Output Return Loss dB 14
Output P1dB dBm +22
Output IP3 dBm +39 See note 2
Noise Figure at min. attenuation dB 4.1 VCTRL = 0 V
Gain Variation Range dB 29 See note 3
Gain Variation Control Voltage, VCTRL V 0 4.5
Group Delay ns 0.6
Supply Voltage V +5
Operating Amplifier Current Range mA 120 150 180 Pin 25
Gain Control Pin Current Range mA 0 25 Pin 5 draws no current at maximum gain
1. Test conditions unless otherwise noted: 25ºC, Vdd = +5 V in a tuned application circuit.
2. 3OIP measured with two tones at an output power of +10 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 with 16 mA of current on gain control pin 5.
Absolute Maximum Rating Ordering Information
Parameter Rating Part No. Description
Operating Case Temperature -40 to +85 °C VG111 PCS/UMTS-band Variable Gain Amplifier
Storage Temperature -55 to +125 °C VG111-PCB1900 1.8 – 2.0 GHz Fully Assembled Application Board
Amplifier Supply Voltage (pin 25) +6 V VG111-PCB2100 2.0 – 2.2 GHz Fully Assembled Application Board
Attenuation Control Voltage +5.5 V
RF Input Power (continuous) +12 dBm
Junction Temperature +220° C
Operation of this device above any of these parameters may cause permanent damage.
N/C
GND
Vctrl
GND
GND
GND
GND
8
9
10
11
12
13
14
28
27
26
25
24
23
22
7 6 5 43 2 1
15
16 17 18 19 20 21
GND
GND
GND
RF OUT
GND
GND
GND
GND
GND
GND
RF IN
GND
GND
GND
GND
GND
GND
GND
N/C
GND
N/C
Variable
ttenuato
Amp