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)