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TMP421-Q1: Does A0 and A1 address pins in FLOAT mode means that V+/2 will be used

Jonathan Geronga
Expert 7930 points
Part Number: TMP421-Q1

Hi Team,

Our customer use the TMP421-Q1 parts in a very noisy application, where floating pins are not allowed. Is it possible to use an external resistor divider to manage the FLOAT adressing mode?

They use the FLOAT (1.65V) level as the floating signal to the Ax address pins.

Will this design work?

Please let me know if you have any questions.

Thanks,

Jonathan


  • 0
    TI__Mastermind 28070 points

    Hi Jonathan,

    This is a not a setup for the TMP421-Q1 that we have validated, it may work but I suspect they will need to use larger resistors than 10k (i.e. 47k or 100k). 

    Are they unable to use one of our other validated address setups with ADD0 and ADD1 tied to GND or VDD? They should be able to get at least 4 addresses without floating any pins. 

    Best Regards,
    Brandon Fisher