PRODUCT DESCRIPTION

The ARA2000 is designed to provide the reverse path amplifcation 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 amplifer stage, and followed by an ultra-linear output driver amplifer. This device uses a balanced circuit design that exceeds the pRoduct descRiption MCNS/DOCSIS requirement for harmonic performance at a +60dBmV output level while only requiring a single polarity +5V supply. Both the input and output are matched to 75 ohms with an appropriate transformer. The precision attenuator provides up to 58 dB of attenuation in 1 dB increments. The ARA2000 has a programmable address that allows multiple devices to share a common control bus. The ARA2000 is offered in a 28-pin SSOP package featuring a heat slug on the bottom of the package.

FEATURES

• Low cost integrated amplifer with step attenuator

• Attenuation Range: 0-58 dB, adjustable in 1dB increments via a 3 wire serial control

• Meets DOCSIS distortion requirements at a +60dBmV output signal level

• Programmable address allows multiple parts to share control bus

• Low distortion and low noise

• Frequency range: 5-100MHz

• 5 Volt operation

• -40 to +85 oC temperature range

APPLICATIONS

• MCNS/DOCSIS Compliant Cable Modems

• CATV Interactive Set-Top Box

• Telephony over Cable Systems

• OpenCable Set-Top Box

• Residential Gateway