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Forum Post: RE: AFE5818: HPF or DC compensation distortion?

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Hi, We have not found any useful combination of LNA HPF disable/enable and PGA enable/disable or LNA_HPF_PROG or RED_LNA_HPF_3X. There is always significant distortion unless both LNA and PGA HPF are disabled (this is not a practical option). We have spent too much time trying different combinations. Please show us measurements and settings that doesn't cause distortion, e.g: * LNA HPF enable * PGA HPF enable * Vin = >200 Vpp at 10~100 kHz Thanks, Christer

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