tga2801d-sg TriQuint Semiconductor, tga2801d-sg Datasheet - Page 9

• Manufacturer Part Number: tga2801d-sg
• Description: Catv Ultra-linear Power Amp
• Manufacturer: TriQuint Semiconductor

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TriQuint Semiconductor Texas : [phone]
Balun performance impacts amplifier return losses and gain. Best performance can be
achieved by winding 34 or 36 gauge bifilar wire around a small binocular core made from
low-loss magnetic material. Suitable wire may be obtained from MWS Wire Industries. Core
vendors include Ferronics, Fairrite, TDK, and Micrometals.
Alternatively, off-the-shelf baluns can be purchased from a number of vendors including
Mini-Circuits (ADTL1-10-75-1, used for this data), ADTL1-18-75), M/A-COM (ETC1-1-
13), and Pulse Engineering (CX2071).
Current can be adjusted by either changing resistor, R1, or forcing a voltage on pin 7.
Tunes out balun inductance. Selected for best return loss.
Recommended Assembly
Component Description
C5 - C8
Ref
C1
C2
C3
C4
R1
L1
L2
T1
T2
Description
0.01μF Capacitor
0.01μF Capacitor
300pF Capacitor
300pF Capacitor
1.0pF - 2.0pF
Capacitor 3/
390nH Inductor
390nH Inductor
Current Adjust 2/
R
Balun 1/
Balun 1/
1
= open circuit
Fax [phone] Web: www.triquint.com
Product Data Sheet
TGA2801D-SG
July 7, 2007
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