DAC161S997: Configure DAC161S997 as active current loop

Intellectual 2110 points

Replies: 4

Views: 51

Part Number: DAC161S997

Hi team,

We have a customer inquiry regarding DAC161S997 application.
Is there a way to configure this device to work in active current loop ?
Because the customer wants to work this device as a passive and also, an active current loop if possible.

Is it possible, what external components are needed?

Please let me know if you need more information.



4 Replies

  • Hi Jonathan,

    I do not think I understand what you mean when say "passive loop" and "active loop".  Can you go into more detail?


  • In reply to Paul_Frost:

    Passive loop is as shown in the DAC161S997 diagram example where the 24V source is supplied externally on loop+.

    Active is 24V supplied internally.



  • In reply to Ed Bragg:

    Hi Ed,

    We generally consider these to be "loop-powered" and "self-powered".

    Loop powered is where the whole system is supplied by the 4mA in the 4-20mA loop.  

    Self-powered is where the system still regulates the current in the loop, but only uses the minimum allowed by the IDAC output.  The system must have some kind of external power.  The loop is still required to have a supply.

    Does this clarify things?


  • In reply to Paul_Frost:

    Any updates?