TheAD1857/AD1858arecompletesingle-chipstereodigitalaudioplaybackcomponents.Theyeachcompriseanadvanceddigitalinterpolationfilter,arevolutionary"linearity-compensated"multibitsigma-deltamodulatorwithdither,ajitter-tolerantDAC,switchedcapacitorandcontinuoustimeanalogfiltersandanalogoutputdrivecircuitry.Otherfeaturesincludedigitalde-emphasisprocessingandmute.TheAD1857/AD1858supportcontinuouslyvariablesamplerateswithessentiallylinearphaseresponse,andsupport50/15µsdigitalde-emphasisintendedfor"Redbook"44.1kHzsamplefrequencyplaybackfromCompactDiscs.Theusermustprovideamasterclockthatissynchronouswiththeleft/rightclockat256or384timestheintendedsamplefrequency.

TheAD1857/AD1858haveasimplebutveryflexibleserialdatainputportthatallowsforgluelessinterconnectiontoavarietyofADCs,DSPchips,AES/EBUreceiversandsamplerateconverters.TheAD1857serialdatainputportcanbeconfiguredineither16-bit,18-bitor20-bitleft-justifiedorI2S-justifiedmodes.TheAD1858serialdatainputportcanbeconfiguredineither16-bitright-justifiedorDSPserialportcompatiblemodes.TheAD1857/AD1858acceptserialaudiodatainMSBfirst,twos-complementformat.Apower-downmodeisofferedtominimizepowerconsumptionwhenthedeviceisinactive.TheAD1857/AD1858operatefromasingle+5Vpowersupply.Theyarefabricatedonasinglemonolithicintegratedcircuitandhousedin20-pinSSOPpackagesforoperationoverthetemperaturerange0°Cto+70°C.