TLV320ADC3101: Clipped ADC Data from TLV320ADC3101

Part Number: TLV320ADC3101


We're inputting a 1kHz sine wave to test code with the TLV320ADC3101.  We're getting data from the ADC that looks like the below image.  It appears to be clipping the sine wave and reducing the signal at the peaks.  We thought this was the AGC and believe we have it turned off.  The register settings we're using are below in the .txt file.

Can you advise any adjustment to the ADC register settings so we get a proper sine wave?