PRODUCT DESCRIPTION
The ARA05050 is a GaAs IC designed to provide 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. This device is capable of meeting the MCNS/DOCSIS requirements for harmonic performance at a +58dBmV output level while requiring only a single polarity +5V supply. Both the input and the output are single-ended and matched to 75 Ohms. The precision attenuator provides up to 30 dB of attenuation in 2 dB increments. The ARA05050 is offered in a 28-pin SSOP package that features a heat slug on the bottom of the package, and is available in a RoHS-compliant option.

FEATURES
• Low Cost Integrated Monolothic GaAs Amplifier With Step Attenuator
• Attenuation Range: 0-30 dB, Adjustable In 2dB Increments Via a 4 Wire Parallel Control
• Meets DOCSIS Distortion Requirements at +58dBmV Output Signal Level
• Low Distortion and Low Noise
• Low Signal toNoise Ratio at All Gain Levels
• Frequency Range: 5-100 MHz
• 5 Volt Operation
• RoHS-Compliant Package Option

applications
• MCNS/DOCSIS Compliant Cable Modems
• CATV Interactive Set-Top Box
• OpenCable Set-Top Box
• Fiber Nodes
• Cable Modem Termination Systems (CMTS)