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CC2530: CC2530 current consumption in sleep mode

Part Number: CC2530

Hello together,

I have a problem with the consumed current of the CC2530.
If I enter sleep mode via:

    SLEEPCMD = (SLEEPCMD &  ~0x03) | 0x02;
    PCON = 0x01;

I have a current of 250µA - which is in my expectation too high! I would expect about 5µA.

There is no leackage current from the GPIO! The only connected components are 2 pullups on pin P2.2 and P1.4 (10kOhm)

Do I have to disable any HW inside the CC2530 by code manually, before entering the sleep mode?
For example, as default in my code the ADC is running. Do I need to disable it?

Thanks for any help!

Best regards