Hi Lkhagvajantsan, The 4-channel electrical grid ADCs could all be good fits for your application. They are designed for the low frequency range. https://www.ti.com/product/ADS131E04 https://www.ti.com/product/ADS131A04 https://www.ti.com/product/ADS131M04 These ADCs ( E, A or M ADC family) perform similarly with differences in sample rates, input range/impedance and power supply options Regards, Mark
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