ARA05050

Reverse Amplifier with Step Attenuator

Please note: this product is being discontinued and is not recommended for new designs.

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.

Data Sheets
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Specifications

DescriptionReverse Amplifier with Step Attenuator
Attenuator Step Size (dB) Typ2
Attenuation Range (dB) Typ0 to 30
2nd Harmonic Distortion Level (dBc) Max-55
3rd Harmonic Distortion Level (dBc) Max-60
Gain Typ. (dB)32
Noise Figure Typ. (dB)1.7
Noise Figure Max. (dB)2.5

Features

  • Low cost integrated monolithic 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 +58 dBmV output signal level
  • Low distortion and low noise
  • Low signal to noise ratio at all gain levels
  • Frequency range: 5-100 MHz
  • 5 Volt operation
  • RoHS-Compliant Packaging

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