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TMP126: TMP126 with another SPI chip

Blindu Marcel
Intellectual 305 points
Part Number: TMP126
Other Parts Discussed in Thread: TMP127

Tool/software:

Hi,

We want to use TMP126 with another SPI IC using the same SPI of the microcontroller.

Right now we have the follow: 

 

But i don`t sure that work for the 10kohm resistor. Can we use the same SPI? or should we use two different SPI?

Best regards

  • +1
    TI__Mastermind 39155 points

    Your schematic should work as-is assuming the other device's SDO/MISO is in a Z state when it is not addressed by the CS pin. 

    You could eliminate the 10kohm resistor by using TMP127, which doesn't require a MOSI connection to retrieve temperature data. This wouldn't have any impact on the above concern, of course.

    ren