ARA05050S12-1

A ARA05050S12 CATV Reverse Amplifier w/ Step Attenuator Advanced product information Rev. 6 FEATURES Integrated monolithic GaAs amplifier and step attenuator. Compatible with all digital and analog modulation types. Frequency range: 5 - 100 MHz. Gain: 0 - 30 dB, variable in 2 dB steps. 5 Volt operation. Low noise figure. Low distortion. Amplifier shutdown capability. Low cost. High reliability. Low signal to noise ratio at all gain levels. DESCRIPTION The ARA05050 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 -55 dBc 2nd harmonic performance at +58 dBmV output Tx Enable/Disable Gain Control S12C 28 Pin SSOP w/ Heat Slug levels. Both the input and output are matched to 75 ohms. The precision attenuator provides up to 30 dB of attenuation in 2 dB increments. The ARA05050 is supplied in a 28-pin SSOP package featuring a thermal heat slug on the bottom of the package. Soldering this heat slug to the ground plane of the PC board ensures the lowest possible thermal resistance for the de...