I have seen ADI using the term RFDAC. What does it means?
RFDAC is a term used to classify some High Speed DAC that are capable of generating signals above 1GHz. ADI today propose 3 products that can be classified as RFDAC:
All these DACs use the proprietary ADI mix-mode that allows to generate signals in the 2nd and 3rd Nyquist zone (see Mix-Mode posting). Although the performance is slightly degraded in mix-mode as signal amplitude is 6dB lower in 2nd Nyquist zone vs. 1st, it can maintian an SNR > 70dB and ACLR >65dB for 1-carrier WCDMA for frequencies up to 2.4GHz.
This high ferquency generation capability allows, in some cases, to use only one component, an RFDAC, in place of a dual DAC + IF filter + Quadrature modulator or DAC + filter + mixer.
The attached presentation give a short overview of RFDAC technoogy and its capabilities.
Retrieving data ...