ARA1400S12

* Low cost integrated monolithic GaAs amplifier and step attenuator with output disconnect switch.
* Meets DOCSIS distortion requirements a +60 dBmV
* Frequency range: 5  100 MHz
* Attenuation Range: 0  56 dB, variable in 4 dB steps
* 5 Volt operation
* Low distortion & Low noise figure

The ARA1400S12 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.  ARA1400S12 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.  ARA1400S12 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 outpu nd balun to achieve   52 dBc 2 harmonic performance at +60 dBmV output levels.  Both the input and output are matched to 75 ohms.  The precision attenuator provides up to 56 dB of attenuation in 4 dB increments.  The ARA1400S12 is supplied in a 28-pin SSOP package featuring a thermal hea slug on the bottom of package Soldering this heat  slug to the ground plane of the PC board ensures the lowest possible thermal resistance for the device resulting  in a long MTF.