The ths4521 part makes sense with the ADS1675. However, the eval board uses THS4503! This makes no sense to me at all. The harmonics of THS4503 are only ~75 dBc, which is well over the SFDR of the ADC. Am I missing something, or is that an error? I plan to use the eval board but it seems the performance will be limited by the preamp. I need all the dynamic range I can get for my application. Can I mod the board and replace the opap with THS4521? I have not looked over the schematics yet.
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