tga2806-sm TriQuint Semiconductor, tga2806-sm Datasheet - Page 7

• Manufacturer Part Number: tga2806-sm
• Description: Catv Linear Amplifier
• Manufacturer: TriQuint Semiconductor

RF Input
1/ 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-
18-75), M/A-COM (ETC1-1-13), and Pulse Engineering (CX2071).
2/ Optional external resistors R1 and R2 increase the Vg1 and Vg2 voltages, respectively as described in
Table II. The increased current improves the output TOI by about 1dB.
1:1 Balun
TriQuint Semiconductor: www. triquint.com [phone] Fax [phone] [e-mail]
75 Ω
T1
TGA2806-SM
C2
C1
Application Circuit
Ref Des
2, 3
5, 6
C1, C2
C3, C4
C5, C6
T1, T2
L1, L2
R2
4
R1
R1
R2
10
26
June 2008 © Rev A
25
11
L1
L2
Description
0.01μF
470pF
270pF
820nH
Balun 1/
6.8k 2/
10k 2/
12
24
19, 20
16, 17
18
C4
C3
C6
C5
+8 V (Vd1)
+8 V (Vd2)
TGA2806-SM
1:1 Balun
75 Ω
T2
RF Output
7