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LMH1983: Power consumption optimization

Prodigy 80 points

Replies: 3

Views: 103

Part Number: LMH1983

Hello, We are using the LMH1983 in an application where power consumption is critical.

As we need only PLL1 I am applying the next register configuration

Registers 0x2E, 0x31 and 0x34 = 0x08 

Register 0x05  = 0x29

The rest of the registers has the default configuration.

¿Is this the best configuration to reduce the power consumption using PLL1 or does any other register configuration reduce even more the power consumption?

in some cases, we also need to powerdown the LMH1983. For that I am using the next register configuration.

Registers 0x2E, 0x31 and 0x34 = 0x08 

Register 0x05  = 0x40

Same question ¿Is this the best configuration to powerdown the LMH1983?

Thank you very much for your support.

Regards

  • Hi Marcos,

    Our team are not knowledgeable in LMH1983 and LMH1981 right now, please expect a feedback early next week.

    Regards,

    Hao

  • In reply to Hao Z:

    Hi Marcos,

    I still don't know much about this device but I'll try to help. This thread talks about powerdown bit: https://e2e.ti.com/support/interface/f/138/t/707816?tisearch=e2e-sitesearch&keymatch=LMH1983%25252525252520power

    I can't put the full register map here but I may be able to provide more information on certain registers. 

    Regards,

    Hao

  • In reply to Hao Z:

    Hello Hao,

    Thanks for your reply. I already read that thread before.

    I understand that you can't put the full register configuration here but based in my first post, could we do anything else to reduce even more the power consumption?

    Best regards,

    Marcos