A
S12
28 PIN SSOP PACKAGE
FEATURES
APPLICATIONS
ARA1400S12
CATV Reverse Amplifier with Step Attenuator
Advanced Product Information
Rev. 2
Low cost integrated monolithic GaAs
amplifier and step attenuator with output
disconnect switch.
Meets DOCSIS distortion requirements at
+60 dBmV
Frequency range: 5 100 MHz
Attenuation Range: 0 56 dB, variable in
4 dB steps
5 Volt operation
Low distortion & Low noise figure
MCNS/DOCSIS Compliant Cable Modems
CATV Interactive Set-Top Box
Telephony over Cable Systems
DESCRIPTION
The ARA1400S12 is a GaAs IC designed to perform the reverse path amplification and output level control
functions in a CATV Set-Top Box or Cable Modem. It incorporates a digitally controlled precision step
attenuator that is preceded by an ultra low noise amplifier stage, and followed by an ultra-linear output driver
amplifier. It is capable of meeting the MCNS/DOCSIS harmonic distortion specifications while only requiring
a single polarity +5V supply. This
part is a single ended design
that does not require an output
balun to achieve 52 dBc 2
nd
harmonic performance at +60
dBmV output levels. Both the
input and output are matched to
75 ohms. The precision
attenuator provides up to 56 dB
of attenuation in 4 dB
increments. The ARA1400S12
is supplied in a 28-pin SSOP
package featuring a thermal heat
slug on the bottom of package.
Soldering this heat slug to the
ground plane of the PC board
ensures the lowest possible
thermal resistance for the device
resulting in a long MTF.
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ABSOLUTE MAXIMUM RATINGS
PARAMETER
PARAMETER
1
28
A
2
ARA1400S12
CATV REVERSE AMPLIFIER WITH STEP ATTENUATOR
Advanced Product Information Rev. 2
Notes:
1. As measured in ANADIGICS test fixture
2. At +60 dBmV output level into 75 ohm load
ELECTRICAL CHARACTERISTICS (TYPICAL) (V
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8
ARA1400S12
CATV REVERSE AMPLIFIER WITH STEP ATTENUATOR
Advanced Product Information Rev. 2
IMPORTANT NOTICE
ANADIGICS, Inc. reserves the right to make changes to its products or discontinue any product at any time without notice.
The Advanced Product data sheets and product specifications contained in this data sheet are subject to change prior to
a products formal introduction. The information in this data sheet has been carefully checked and is assumed to be reliable.
However, ANADIGICS assumes no responsibility for inaccuracies. ANADIGICS strongly urges customers to verify that the
information they are using is current before placing orders.
WARNING
ANADIGICS products are not intended for use in life support appliances, devices, or systems. Use of an ANADIGICS
product in any such application without written consent is prohibited.
A
ANADIGICS, Inc.
35 Technology Drive
Warren, New Jersey 07059
Tel: (908) 668-5000
Fax: (908) 668-5132
http://www.anadigics.com
Mktg@anadigics.com
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