DAC and analog stage


The DAC IC is one of the most important part of a Digital to Analog converter unit.
Our new series of DAC use one IC of the Sabre family, in particular the ES9016 and ES9018. The Sabre DAC is a high-performance 32-bit, 8-channel audio D/A converter targeted for hi-end digital audio units. Two patented technologies are inside the Sabre DAC: 32-bit Hyperstream(TM) DAC architecture and Time Domain Jitter Eliminator. In particular the 32-bit Hyperstream(TM) architecture can handle up to 32-bit PCM data via I2S input, as well as DSD or SPDIF data. Time Domain Jitter Eliminator removes clock inconsistencies from the incoming digital data, so the converted analog output preserves the clarity and soundstage detail of the original recording.

One of the most critical circuit for the sound is around the analog side of the DAC. The D-to-A IC put in conjunction the digital to the analog world. In particular these parts are foundamentals for the best audio performances: power supply of the analog DAC section, analog stage, analog stage power supply.
The power supply of the analog DAC section need to be simply perfect since it is the reference for the converted signal. This voltage need to be noiseless and stable. Only in this way the converted signal will have the maximum allowed dynamics. Our experience shows that it is very easy to increase the noise floor with an incorrect choice in some critical parts. The Sabre DAC need a very clean and perfect buffered analog power supply to deliver the best performances; the Sabre is one of the most exigent DAC for this parameter.
toThe analog stage is the other critical part. In general to achieve the best audio performances the analog stage need to be tailored around the analog section of the DAC. Each DAC is different from the others and in particular the Sabre DAC, that can be used in current or voltage mode. We use a current topology of the analog stage that allows the best performances.

Giu, 11, 2016