I'm using ad9228 40MSPS adc package with that I'm configuring adc using SPI with sclk speed of 500khz I'm facing issue with write operation.i can able to read/write chip configuration and device index registers but I was unable to write adc functions registers .
I had verified DRVDD and AVDD Both are connected with 1.8v supply
PDWN Pins are in low state.
Reft and refb are connected as per recommended data sheet configuration
I'm driving clk+ and clk- as single ended lvcoms33 and clk+ driving with 40mhz clock and clk- as logic 0.
ADC soft reset are in off state and I had enabled dco and fco clock but there is no output form ADC .
Kindly support
Thanks in advance