ARA05050RS12P1

Overview

The ARA05050RS12P1 is a GaAs integrated circuit designed for reverse path amplification and output level control in CATV Set-Top Boxes or Cable Modems. It incorporates a digitally controlled precision step attenuator preceded by an ultra-low noise amplifier stage and followed by an ultra-linear output driver amplifier. The device operates on a single polarity +5V supply, with input and output matched to 75 Ohms. It meets MCNS/DOCSIS requirements for harmonic performance at a +58dBmV output level.

Feature Summary

• Integrates reverse path amplification with a digitally controlled precision step attenuator
• Features an ultra-low noise amplifier stage and an ultra-linear output driver amplifier
• Provides attenuation range of 0-30 dB adjustable in 2 dB increments via 4-wire parallel control
• Meets DOCSIS distortion requirements at high output signal levels

Applications

• MCNS/DOCSIS compliant cable modems
• CATV interactive set-top boxes
• OpenCable set-top boxes
• Fiber nodes
• Cable modem termination systems (CMTS)

Procurement Notes

Verify the component status as obsolete before procurement planning. Confirm package compatibility with the 28-pin SSOP footprint featuring a heat slug. Ensure design specifications align with the 5V operation requirement and 75 Ohm impedance matching. Validate that the frequency range of 5MHz to 100MHz suits the target application. Check for RoHS-compliant packaging options if environmental regulations apply.

Selection Notes

Select this component for applications requiring integrated reverse amplification and precise attenuation control within a compact GaAs IC. Consider its suitability for CATV environments where DOCSIS compliance is mandatory. Evaluate the need for a single +5V supply and 75 Ohm interface matching. Assess whether the 30 dB attenuation range in 2 dB steps meets system gain control requirements. Verify thermal management capabilities due to the heat slug design.

Part Context

The ARA05050RS12P1 belongs to Skyworks Solutions' family of RF amplifiers specifically engineered for cable television infrastructure. It addresses the need for combined amplification and attenuation in reverse path signals. The integration of these functions reduces component count and board space compared to discrete solutions. This part supports legacy and specific modern cable modem architectures requiring precise signal level management.

Replacement Considerations

No public confirmed substitute part numbers are available. The component status is listed as obsolete. Designers should consult Skyworks Solutions directly for potential end-of-life alternatives or next-generation replacements suitable for CATV reverse path applications.