starcoming
Member level 1
In some datasheets about delta-sigma DAC products, I find that the DAC outputs are general not from 0 to Vdd, but from 0 to 0.65Vdd or so such as CS4344/5/6/8 from CIRRUS LOGIC. If it is to prevent the out of range of modulator, I think the output can swig from 0 to 0.8vdd or so.
Who knows the reason for the value 0.65.
Who knows the reason for the value 0.65.