NPC filters

 

 

Nippon Precision Circuits LTD. produces the digital filters used in the finest audiophile outboard digital to analog converters. Audio Crafters Guild is very proud to be offering their newest and most advanced 8x oversampling filters for use in your projects. Combined with a DIR like the CS8412, Rsquared/R DACs like the PCM63, your favorite analog stage and power supplies these NPC filters will set you on the path to true state of the art reproduction of all your digital sources. This architecture is especially well suited to DACs featuring tubed output stages. Audio Crafters Guild maintains files containing circuits using these filters. We are pleased to share these if you will send a self addressed stamped envelope and note detailing the type of project you are building.

 

 

SM5842AP/T defines the state-of-the-art for integrated digital audio filters.

26 x 24 bit multiplier with 32 bit accumulator for ultra accurate processing of the audio data.

Digital de-emphasis for 44.1, 48, and 32 k Hz sample rates allows clean simple analog stages.

Switchable dither and soft mute options.

Most flexible I/O in the business, 16, 18, 20, or 24 bit inputs and 18, 20 , 22, or 24 bit outputs.

Filter pass band is within 0.00002 dB, stop band attenuation exceeds 117 dB.

Easy to use 28 pin DIP package and single +5 v DC supply.

The choice for projects aspiring to push the envelope of state of the art digital audio.

 

 

SM5843A combines high performance, rich feature set, and a reasonable price.

21 x 22 bit multiplier with 25 bit accumulator for very accurate processing of the audio data.

Digital de-emphasis for 44.1, 48, and 32 k Hz sample rates allows clean simple analog stages.

Choice of two filter response characteristics. Optional filter yields a more open airy sound.

Flexible I/O , 16, 18, or 20 bit inputs and 18 or 20 bit outputs.

Filter pass band is within 0.00005 dB, stop band attenuation exceeds 110 dB.

Easy to use 28 pin DIP package and single +5 v DC supply.