Thanks! it's work. I have a new problem in board: 1) R89 is 0 Om. Is it right? I think is error. I connect via j10 through a buffer and as a result I get nothing. Replacing it with 10k - is ok. 2) I use the scheme "Figure 102. Typical Power Metering Connections" and the nominal values specified in "10.2.2 Detailed Design Procedure" from the datasheet ADS131A0x. I'm measuring constant voltage by connection to the j9. I give through the calibrator 50B of a constant signal. The result is in the figure. If i use buffer - it's ok. May be i misconfigured ADC?
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