I encountered some issues about AD9212-40, could you please help check them
1、when CLK doesn't connect the common-mode voltage, what is voltage for pin9（clk-） and pin10（clk+）, should it be 1.6V or 1.25V.
2、 how to start the test mode, and how to connect the circuit.
If the clock input pins on the AD9212 are not connected, the voltage would be the common mode voltage (1.2V).
The ADC can output numerous test patterns. You can use register 0x0D to select the desired test pattern.