We don't have many specs for the system set in stone yet, but I'll answer these with our best approximations. What is driving the need for 18-bit? We are working on a Side Scan Sonar project and wanted 16-18 bit ADC to keep the resolution high for imaging. What are your SNR, SFDR requirements? We don't have any yet. Does your input signal need to be AC- or DC-coupled to the ADC? Likely AC coupled, it will be coming from an amplified output of the transducer. What is the signal voltage type (single-ended, differential)? Likely single-ended What is the signal amplitude? It might be around 5V, but can be changed Is it ground centered, or is there some common mode voltage plus AC? Likely ground centered
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