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ADS4149: Regarding behaviour of ADS4149

Part Number: ADS4149

Tool/software:

Hello,

           I was trying to test ADS4149 on my board and have attached the schematic of my board. I did following tests.

1) I disconnected inputs of the ADS4149(unmounted R98, R98, C94, C93 in my board) and captured the digital output in my FPGA. I got approx. 0.90V. Is this the correct behavior of ads4149?

2) I further removed biasing of inputs(unmounted R96, R97) and captured again. This time also I got 0.90V. Pl confirm about this test also.

8372.ADS4149.pdf