I want to design a 10-channel data acquisition circuit with AD9249. There are two quesions:
1、AD9249 has 16-channel. What should I do with the unused analog input VIN− and VIN+? Tied to GND, or just left floating?
2、What should I do with the unused digital output D− and D+? Left floating?
3、I must use dc coupled input, so balun and transformer will not work. Is ADA4932-1 suitable to drive AD9249?