PRODUCT DESCRIPTION
The ARA2004 is 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 uses a balanced circuit design that exceeds the MCNS/DOCSIS requirement for harmonic performance at a +60 dBmV output level while only requiring a single polarity +5 V 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 via a three-wire serial interface. With external passive components, this device meets IEC 1000-4-12 and ANSI/IEEE C62.41- 1991 100KHz ringwave tests, as well as IEC1000-4-5 1.2/50 µS surge tests. The ARA2004 is offered in a 28-pin SSOP package featuring a heat slug on the bottom of the package.

FEATUREs
• Low cost integrated amplifier with Step Attenuator
• Attenuation Range: 0 - 59 dB, adjustable in 1 dB increments via a 3-wire Serial Control
• Meets DOCSIS distortion requirements at a +60 dBmV output signal level
• Low distortion and low noise
• Frequency range: 5 - 100 MHz
• 5 Volt Operation
• -40 to +85 8C temperature range
• RoHS Compliant Package Option

APPLICATIONs
• MCNS/DOCSIS Compliant Cable Modems
• CATV Interactive Set-Top Box
• Telephony over Cable Systems
• OpenCable Set-Top Box
• Residential Gateway