Can anyony explain the different between ADI PulSAR and conventional SAR ADCs? Are they the same or anything special? Thanks a lot.
In addition, the PulSAR uses a CNV pulse ( which can go Lo during conversion and must return Hi befor the end of conversion) to start the SAR ADC conversion process while SAR ADC use the /CS( which usually remain Lo during conversion process) to initiate conversion process.
Basically the PulSAR ADC uses internal switched capacitor to extend SAR resolution. Please see attached article to further explain the ADI PulSAR and SAR ADC.
Thanks for reply.
However, I can not figure it out why PulSAR can reach >16-bit of resolution from AN-931. It seems like a regular SAR process. How could it overcome the CMOS capacitor array accuracy to 16-bit of resolution without laser trimming or else?
As explained in AN-931, ADI uses proprietary internal switched capacitor techniques to extend the resolution of SAR ADCs to 18 bits using CMOS process, which does not require laser trimming.
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