AD转换基础资料

24/A/D()A/D()A/DA/D25A/D0000010100110000010100111v2v3v4v5v6v7vA/D26,27CC=1C=0‰A/D8D/A88D7-D08D/AA-+CLKEOCSCViV0CLRD/AD0~D7S=08“0”S=128•SS8“0”S•8D/A00H0VVoViVoC=1,0ViVoC=1VoVi,C=0•D7-D0ViA/DCA/D29...A/DViV0t0SEOCA/D30‰A/D•A/D•A/DA1A231A1-+VXVNS1A2-+S2CV01............A/DA/D0T1T2A/DA/DV01t0t1t2t3V01mA/D32•A/D••“0”S2A1Vo1=0V•S1VXS2Vx),Vo1A21“0”A/D••S1VN•VN•Vo11Vo1=0A/D33‰T1:V01=-=-=t=t2v01m=T1RC1∫21)(ttdtVx111TRCT∫21)(ttdtVxVx∫−21)(1TTdtVxTRC1Vx34‰:T2:v01=v01m+[-Ndt]•t=t3v01=00=v01m-Ndt=NT2,T2=T1/vN•fNTT1=N1/f,T2=N2/f.N1VNN2=N1N•N2,N2A/D∫321ttVRC∫321ttVRCVxRCT1RCVVxVVxVx35‰A/D•A/D•8D/A.•D/AVoVXA/D36-+8D/AViVOCLKD7D6D2D3D4D5D0D1A/D37T1T8T7T6T5T4T3T2......52.53.754.3754.694.844.734.8050A/DA/DVi/VtA/D384.80V123AD.1“0”2T1D7“1”8D/A10000000BVo5V128/255VoViD7“0”(“1”)393D6“1”D/A01000000B2.5VVoViD6“1”(D60)3T3D5“1”……4D0“1”5867T240D/AV0VV0Vi100000005.0V0ViD7=0010000002.5V0ViD6=1011000003.75V0ViD5=1011100004.375V0ViD4=1011110004.69V0ViD3=1011111004.84V0ViD2=0011110104.76V0ViD1=1011110114.80V0ViD0=106464+32=9664+32+16=11264+32+16+8=12064+32+16+8=12064+32+16+8+2=12264+32+16+8+2+1=123A/D41A/D•A/D•A/D•A/D•A/D42A/D()1.2.3.431A/D0000010100110000010100111v2v3v4v5v6v7v-0.5~0.5v0000.5~1.5v0011.5~2.5v0105.5~6.5v1106.5~7.5v111ADC44A/D8A/D810A/D10452ADC46LSB12ADC0LSB14LSB34ADC12LSBADCADC:473A/D48A/D1.A/D2.A/D491.A/Dzzzzz50zADCADCzADCADCzADCADCADCADC51z468101214161s1ms1us1ns52zADCADC0809ADCAD570ADC1210532.A/D1)A/D2)A/D541)A/DA/DA/DA/D(552)A/DA/DA/D56A/D,A/DA/DA/DA/D0~10V,0~5V2A/D57ˆADCˆADCˆADC58PCI/OA15~A0CLKIORT4T1T2T3TwD7~D0INAL,DXIORCPUˆADCPCIORADC00159‰ADCPCI/OA15~A0CLKIOWT4T1T2T3TwD7~D0INAL,DXIORCPUADCPCIOR00160ˆADCPC812ADC12?ADCCPU6112A/DD7~D0IOR80000484D3~D0port_Lport_H11buffer:INAl,port_LMOVbuffer,ALINAL,port_HMOVbuffer+1,AL62A/D8DAC8D/AVREFIOUT2RFBAGNDVCCDGNDDI7~DI0LE2IOUT1LE1CSWR1WR2XFERILE1118‰D/AD/A63‰A/D‰A/DA/DA/DA/D64A/DADCADC0804ADC0809ADC1210CPUPCIOW001A/DA/DOUTDX,AL65ADCAD570AD571AD572A/DCPUADCPCIOW001A/DOUTDX,ALA/D66EOCA/DA/DA/DA/D()67A/DCPUA/D‰‰‰‰A/DA/DEOC68‰A/DA/DA/DYN?A/DCPUA/DA/DCPUA/D69‰PCIOR001A/DINAL,DXA/DEOCCPUCPUA/DCPUA/DCPUA/D70A/DA/DYNNYA/D?71ˆA/DA/DIRQ4PCA/DCPUA/D72()8259AA/DSTI8259ADOSCLIEOIA/DIRETA/D73EOIIRETA/D8259ASTI8259ADOSCLINA/DHLTYHLT74‰A/DA/DREADYCPUA/DREADYCPUINREADYCPUI/OREADY,A/D75T1T2T3TwT4READYA19~A16AD7~AD0IO/MA15~A8ALERDDT/RDENCLKIOMA19~A16S6~S3D7~D0/S6~S3A7~A08088CPU,T3READYREADYTw;READYT476A/DA/DIOCHRDYPCIBMPC/XTIOCHRDY77A9~A0IORCLKD7~D0T1T2T3T4IOCKRDYTwTwTwTwT3IOCKRDYIOCKRDYTwIOCKRDYT478A/DA/DYN?A/DA/DA/DYN?