Hi, Nowhere in the datasheet does it state that the high-pass filter functions must be disabled for the specification in the datasheet to be valid, e.g. to work properly with 30 or 113 kHz signals. On the contrary, from the datasheet: Page 1: "Applications - Sonar imaging equipment" Page 33: "This broad analog frequency range enables the device to be used in both sonar and medical applications." Page 78: "In addition, the signal chain of the device can handle signal frequencies as low as 10 kHz and as high as 50 MHz. As a result of the device functionality, the device can be used in various applications (such as in medical ultrasound imaging systems, sonar imaging equipment, radar, and other systems that require a very large dynamic range)" This is not a trivial matter of just disabling the HPF. That is simply not a viable option in a real product that requires wide bandwidth and high dynamic range. Does this mean you are admitting that the AFE5818 is poorly or incorrectly designed and that you've failed in your verification? If this is true, you do understand that we will need to replace the AFE5818 at the cost of our customer? The datasheet is from 2015 and we have to drag this information out of you? This doesn't give us much confidence in choosing another ADC or other products from TI. Please advise. / Christer
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