Abstract

Isolated amplifiers, such as the AMC0311 or AMC0330, are frequently paired with successive approximation register (SAR) analog-to-digital converters (ADCs). Many high-voltage systems use a multiplexed ADC to quickly scan through multiple channels and pass this information to the controller. This imposes stringent timing requirements and reduces the time allowed for each channel conversion. This application note provides examples of how operational amplifier selection affects the DC and AC characteristics of the signal chain and what happens when timing requirements are violated.