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Data_acquisition_front_end

2016-10-18 19:59  
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Data_acquisition_front_end
Figure 2-1 shows a typical data0acquisition system using a MAX358 multiplexer.Because the mux is driving a high-impedance input , the error is a function of IC resistance r DS(ON) times the mux leakage current I DS(ON) and the amplifier bias current IBIAS、or:VBRROR=r DS(ON) ×I D(ON) +IBIAS(MAX420) =1.5kΩ×(2nA+30 pA) =3.05-μV maximum error