Product Description
Stanford Microdevices CGA-6618 is a high performance
GaAs HBT MMIC Amplifier. Designed with the InGaP
process technology for excellent reliability. A Darlington
configuration is utilized for broadband performance. The
heterojunction increases breakdown voltage and minimizes
leakage current between junctions. The amplifier contains
two amplifiers for use in wideband Push-Pull CATV amplifiers
requiring excellent second order performance. The second
and third order non-linearities are greatly improved in the
push pull configuration.
Amplifier Configuration
Preliminary
Preliminary
CGA-6618
Dual CATV Broadband High
Linearity GaAs HBT Amplifier
Product Features
Excellent CSO/CTB/XMOD Performance at
1
2
3
4
8
7
6
5
+34 dBmV Output Power per Tone
Dual Devices in each SOIC-8 Package simplify
Push-Pull configuration PC board layout
Operates from a single supply
Dropping Resistor provides
Temperature Compensation
Applications
CATV Head End Driver and Predriver Amplifier
CATV Line Driver Amplifier
R
BIAS
=39 Ohms
T
L
= 2 5 º C
Z
S
= Z
L
= 75 Ohms
Freq.
50 MHz
500 MHz
860 MHz
U nits
Min.
Ty p.
14.0
14.1
14.0
72
82
74
38
40
40
21.5
21.5
21.0
12.5
17.0
13.5
10.0
19.0
13.5
3.9
4.1
4.4
81
70
65
4.7
Max.
Key 75 Ohm Parameters at Room Temperature 50-860MHz CATV Band Data
Test C onditions:
V
S
= 8.0 V
l
D
= 160mA
Gai n
dB
Output IP 2
Tone spaci ng = 1 MHz
P out/Tone = +6 dB m
Tone spaci ng = 1 MHz
P out/Tone = +6 dB m
50 MHz
500 MHz
860 MHz
50 MHz
500 MHz
860 MHz
50 MHz
500 MHz
860 MHz
50 MHz
500 MHz
860 MHz
50 MHz
500 MHz
860 MHz
dB m
Output IP 3
dB m
Output P 1dB
dB m
Input Return Loss
dB
Output Return Loss
dB
Noi se Fi gure
C SO
C TB
X MOD
Vd
A verage of 3 devi ces
B alun Inserti on Loss Included
Worst C ase Over B and
Worst C ase Over B and
Worst C ase Over B and
79 C h., Flat, +34dB mV
79 C h., Flat, +34dB mV
79 C h., Flat, +34dB mV
50 MHz
500 MHz
860 MHz
dB
dB c
dB c
dB c
V
Note:
Measured in Push-Pull Application test board
The information provided herein is believed to be reliable at press time. Stanford Microdevices assumes no responsibility for inaccuracies or omissions.
Stanford Microdevices assumes no responsibility for the use of this information, and all such information shall be entirely at the users own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. Stanford Microdevices does not authorize or warrant any Stanford
Microdevices product for use in life-support devices and/or systems.
Copyright 2001 Stanford Microdevices, Inc. All worldwide rights reserved.
726 Palomar Ave., Sunnyvale, CA 94085
Phone: (800) SMI-MMIC
http://www.stanfordmicro.com
EDS-101994 Rev B
STANFORD [ STANFORD MICRODEVICES ]
