量差分输出、电流模式数/模转换器（DAC）的线性度

LSB=(max(VOUT)-min(VOUT))/65535;

INL(1)=0;

DNL(1)=0;

for i=2:65536

INL(i)=(VOUT(i)-(VOUT(1)+(i-1)*LSB))/LSB;

DNL(i)=(VOUT(i)-VOUT(i-1)-LSB)/LSB;

end

%Plot INL

figure(2)

plot(DacCodes, INL);

title('DAC Integral Linearity');

xlabel('DAC Input Code');

ylabel('INL (LSBs)');

axis([0 65536 min(INL)*1.1 max(INL)*1.1]);

set(gca,'XTick',0:16384:65536)

%Plot DNL

figure(3)

plot(DacCodes, DNL);

title('DAC Differential Linearity');

xlabel('DAC Input Code');

ylabel('DNL (LSBs)');

axis([0 65536 min(DNL)*1.1 max(DNL)*1.1]);

set(gca,'XTick',0:16384:65536)

txtstr=sprintf('INL MAX = %f', max(INL));

disp (txtstr);

txtstr=sprintf('INL MIN = %f', min(INL));

disp (txtstr);

txtstr=sprintf('DNL MAX = %f', max(DNL));

disp (txtstr);

txtstr=sprintf('DNL MIN = %f', min(DNL));

disp (txtstr);

16位脚本产生的曲线

来源：维库开发网