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TMP100: ADD0, ADD1 float condition

Toshiro Imi
Expert 7170 points
Part Number: TMP100

Tool/software:

Hello,

Our customer had a question ADD0, ADD1 float condition. Could you let us know "float" condition detail e.g. pin voltage, current, for fixing salve address 1001101,

when I checked the datasheet H level input logic, L level inout logic below, it seems between 0.3 (V+) to 0.7 (V+). 

best regards,

  • 0
    TI__Expert 7170 points

    Hi Toshiro,

    Float refers to leaving an open connection (Hi-z) at the address pin. If more information on how the device detects the address pin connection is needed, please let me know.

    Best regards,

    Simon Rojas

  • 0 in reply to Simon Rojas Avila
    TI__Expert 7170 points

    Hi Simon,

    Can you tell me how TMP100 address pin detects Hi-Z state ?

    Best regards,

  • +1 in reply to Toshiro Imi
    TI__Expert 7170 points

    Hi Toshiro,

    After confirming with our design team, the TMP100 will detect the connection of the address pin by both sinking and sourcing current internally. In the state of a floating pin, the sinking voltage will go close to GND and the sourcing voltage will go close to VDD and this is how a HI-Z state is detected.

    On the other hand, having a voltage divider or a voltage in between Vih and Vil, will make the device default to either a 1 or a 0 and the address will be undetermined. In short, if the desired address has a float connection at the address pin, the pin should be left open.

    Best regards,

    Simon Rojas