This product is a high-precision delta-sigma analog-to-digital converter that uses Easy Drive technology to achieve direct sampling of large RC networks. This technology does not require on-chip buffers and has higher performance.
This document describes the 'Easy Drive' technology found in the LTC248x family of delta-sigma analog-to-digital (ADC) converters. It explains how this fully passive sampling network automatically cancels differential input current errors, allowing large RC networks to be placed directly at the ADC input without degrading DC accuracy.
The technology maintains a full-scale error of 0.002% with input RC networks up to 100kΩ and 10μF.
An external 1pF capacitor reduces a 1V spike to 18μV.