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Eight TMP006 on a signle bus

Tomoaki Kobayashi
Prodigy 20 points
Other Parts Discussed in Thread: TMP006

I'd like to know how to control for the eight devices to be addressed on a signale bus.   I can see the ADR0/ADR1 state and the SMBus address up to six devices on the data sheet, but not for the 7th and 8th device.

 

  • 0
    TI__Mastermind 27715 points

    Hello Tomoaki,

    I apologize - Table 1 in the TMP006 data sheet which shows the address combinations is incorrect. We are in the process of revising the data sheet, and the new version should be ready by the end of this month.

    The table below shows the proper connections for all 8 address combinations.

    Best regards,

    Ian Williams
    Linear Applications Engineer
    High Performance Linear

    A1 A0 Address
    0 0 1000000
    0 1 1000001
    0 SDA 1000010
    0 SCL 1000011
    1 0 1000100
    1 1 1000101
    1 SDA 1000110
    1 SCL 1000111
  • 0 in reply to Ian Williams
    Prodigy 20 points

    Hi Ian,

    Thanks!    So it means that we can make the connections as below?

     

    Regards,

    Tomoaki Kobayashi

  • 0 in reply to Tomoaki Kobayashi
    TI__Mastermind 27715 points

    Hello Tomoaki,

    Yes, those connections are correct.

    Best regards,

    Ian Williams

  • 0 in reply to Ian Williams
    Prodigy 40 points

    Ian,

    I have a similar question, looking at the above thread it seems you all are using just the sensor. I purchased two of the EVM modules and would like to communicate with both. Is communicating with more than one sensor using the EVM modules possible. I am curious because none of the pins coming out of the chip are the address select pins?

    Best Regards,

    Joey Kaseta

  • 0 in reply to Joseph Kaseta
    TI__Mastermind 27715 points

    Hello Joey,

    Yes, communicating with more than one TMP006 sensor using the EVM modules is possible. However, it requires some hardware and software modification.

    On the TMP006EVM, resistors R1 and R2 pull the address pins ADR1 and ADR0 down to GND. You can remove one or both of these resistors and wire the address pins high to VDD instead. This allows you to set the two TMP006 to different I2C addresses.

    Then, you would either need to use custom software or modify the TMP006EVM source code to communicate to both devices simultaneously.

    Best regards,

    Ian Williams

  • 0 in reply to Ian Williams
    Prodigy 245 points

    I would like to connect 8 sensors to a MSP microcontroller and send the signal on UART. Or also display the temperatures on LCD...

    have someone made this? or does someone has as link that points to a forum that has this?

    regards,

    Daniel H