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THS4551: schematic review of THS4551, OPA810 and ADS4222

Part Number: THS4551
Other Parts Discussed in Thread: OPA810, ADS4222, THS4521, , TINA-TI


Need your help to review the schematic.

1) The application is for measure voltage from u0adc_in or u1adc_in from -100V to 100V.   This application is likely an oscilloscope.

2) Sample rate of adc is 50M/s

3) Considering protect ads4222 with 1.8V input, the OPA810 power supply is set +1.8/-3.3V (datasheet requires power supply >4.75V), any problem of current design?

4) Any issue if voltage u0adc_in is higher than 100V, can be protected by R44?

5) Any issue if ESD discharge on u0adc_in, can be protected by R44?

6) U18 is LVDS clock powered by 3.3V, will it damage or impact the ADS4222 clock input (1.8V)?

7) FPGA data bus d0....d11 is connected to FPGA, is it ok with current in serial resistor?

8) Please comments on whole schematic.

op and adc1.pdf