Hi Preeti, Welcome to our e2e forum! You may be able to get away without using a buffer depending on how fast you are accessing the ADS7828. Here is a video that you may find helpful. We have several other videos that you might find useful as well: https://www.ti.com/video/series/precision-labs/ti-precision-labs-analog-to-digital-converters-adcs.html The SAR ADC input driver series should help as well.
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