Reverse Amplifier with Step Attenuator

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 +60dBmV output level while only requiring a single polarity +5V supply.


  • Low Cost integrated amplifier with step attenuator.
  • Attenuation range: 0-58dB, adjustable in 1dB increments via 3 wire serial control.
  • Meets DOCSIS distortion requirements at +60dBmV output signal level.
  • Low distortion and low noise.
  • Frequency range: 5-100MHz.
  • 5 Volt operation.
  • -40 to +85 deg C temperature range.
  • RoHS Compliant Package Option
Data Sheets ARA2004: Reverse Amplifier with Step Attenuator ARA2004_204313A.pdf (648 KB)
ProductName : ARA2004
Description : Reverse Amplifier with Step Attenuator
Attenuator Step Size (dB) Typ : 1
Attenuation Range (dB) Typ : 0 to 58
2nd Harmonic Distortion Level (dBc) Max : -53
3rd Harmonic Distortion Level (dBc) Max : -53
Gain Typ. (dB) : 29.3
Noise Figure Typ. (dB) : 3
Noise Figure Max. (dB) : 4
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