PA_BIAS Voltage not turning up

The SPI writes look correct for what you want to do.  Can you confirm:

• Board revision is Rev. B?
  • Rev. B is fairly old.  Has this been in your possession for a while?
• Re-do the measurement and ensure you are measuring the pin on P9A you think you are.  It is easy to measure adjacent pins in error
• Remeasure CREG1.  That should not be 0V

We are using Rev. B eval schematic. All tests are being carried out using the same.

Is it required to switch to Rev. D version ?

We have measured multiple times so I believe pin error may not have happened.

CREG1 is measured as 0V only. 

Any ideas would be highly appreciated.

If the ADAR1000 is working, it is not required to switch to the Rev. D.  I still do measurements on Rev. B boards.

The CREG1 being 0V could effect the PA Bias.  See Figure 86 in the datasheet.    You may have a damaged ADAR1000.

You may want to purchase the latest evaluation board. 

If the ADAR1000 is working, it is not required to switch to the Rev. D.  I still do measurements on Rev. B boards.

The CREG1 being 0V could effect the PA Bias.  See Figure 86 in the datasheet.    You may have a damaged ADAR1000.

You may want to purchase the latest evaluation board.