16-Bit, 250 Ksps, 8-Channel, Single Supply, Isolated Data Acquisition System based on AD7689 ADC

Application Circuit uses the AD7689, 16-bit, 8-Ch, 250 kSPS PulSAR ADC along with two AD8608 low cost precision quad op-amps to provide the entire signal conditioning and digitizing function in the data acquisition system. The only other op amp required is the AD8605 that is used to buffer the reference voltage from the AD7689. The AD8605 and AD8608 are low cost single and quad rail-torail input and output CMOS amplifiers. The AD8608 inverts, level shifts, and attenuates the ±10 V input signal so that it matches the input range of the ADC, which is 0 to +4.096 V when using +4.096 V reference and +5 V single supply