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TIDEP-0091: 4-20mA level transmitter design for TIDEP-0091

N.T
Prodigy 10 points
Part Number: TIDEP-0091
Other Parts Discussed in Thread: IWR1443, IWR1443BOOST

I would like to design 4-20mA level transmitter referencing TIDEP-0091.

I look at Fig.12 in TIDEP-0091, yellow plot (CUR5V) seems 550mA,and over 20mA.

Is it possible to realize a 4-20mA level transmitter without suppressing the current value to 4mA or less?

  • 0
    TI__Guru 50240 points

    Hi N.T.

    Yes, the TIDEP-0091 was designed to demonstrate IWR1443 used in a 4-20 mA solution.

    The current consumption will depend on the voltage applied at a system level. For the IWR1443BOOST a 5 V supply is used and for lower current an appropriate voltage should be used.

    Regards,

    AG

  • 0 in reply to Akash Gondalia
    Prodigy 10 points

    Hi Akash Gondalia

    Thank you for replying.

    I look block diagram in tidrqs3a. System voltage 5V supply PMIC .

    Is it possible to control 4mA or less by changing the PMIC control method?

    Regards.

  • 0 in reply to N.T
    TI__Guru 50240 points

    Hi N.T

    This particular PMIC (LP87524) leverages a 5V input but alternative power solution could work with different supply voltages.

    The TIDEP-0091 shows efficacy of using IWR1443 in a 4-20 mA solution because the measurement cycle happens very fast and as a result consumes much less energy. This is why the main power measurement figure is represented in millijoules (or rather mJ per measurement).

    Regards,

    AG