电源对噪声性能的影响 !!!!PSRR ADC DAC DC PSRR ǖ ADCDAC 1261 Nicholas Gray 20073 (AC PSRR) !!!! 1 !!!!ADC ! AC PSRR !!!! ADC , dB4.75V 5.25V500mVADC 0.6mVPSRR 20056402 1. !!!! ADC SNR !!!! 4.75V 5.25V !!!! ! !!!! 2 ADC12040 12 40Msps 200mVp-p ADC FFTADC !!!!30MHz38dB ADC12040 10dB20dB AN-1261 2007 National Semiconductor Corporation 200564 www.national.com AN-1261 20056403 20056404 2. ADC12040 !!!! 10μF 0.1μF IC , ADC2.5 3 3. 2.5 !!!! MHz ESL LDO www.national.com 2 AN-1261 3 www.national.com ǖwww.national.com ǖ 1. /ǖa b 2. // CSP-9-111C2 CSP-9-111S2CSP-9-111S2"" RoHS AN-1261 National Semiconductor Americas Customer Support Center Email: new.feedback@nsc.com Tel: 1-800-272-9959 National Semiconductor ……