LTC2631和LTC2540增加了I2C能力和双极性REF引脚，内置集成的参考源。LT1991运算放大器具有内部精密电阻，是改善输出范围设计的理想选择。12-bitDACinTSOT-23IncludesBidirectionalREFPinforConnectiontoOpAmporExternalHighPrecisionReferenceDesignNote448KevinWrenner,TroySemanandMarkThorenIntroductionTheLT1991precisionopampisasuperbchoiceforTheLTC2630’scombinationofa12-bitDACandlow-driftamplifyingorattenuatingtheDACoutputtoachieveaintegratedreferenceinatinySC-70packagehasprovendesiredoutputrangebecauseitrequiresnoprecisionpopularforawidevarietyofapplications.TwonewDACs,externalresistors.Itsintegrated,precisionresistorsaretheLTC2631andLTC2640,tak
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