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PGA900: Read data of a thermistor using SPI

Diogo Matos
Prodigy 10 points

Part Number: PGA900

Hello,

My objective is to connect a thermistor to a PGA900 and read the temperatura information using SPI protocol? My doubt is what is the simplest solution for this and if I have to use the current mode to performe that reading.

Thanks in advance.

DM

  • 0
    TI__Mastermind 31655 points
    Hello,

    You can output the temperature information via SPI using the COMBUF registers while the microcontroller is running. If your goal is to simply use a digital interface to output the value, the analog output mode should not make a difference, so the device can be set up in either current mode or voltage mode.

    The temperature sensor driver is a current supply, and cannot be changed to a constant voltage supply if that is the question.

    For more information on how to use the COMBUF registers and how to develop the firmware to output temperature data through the digital interfaces please reference the Software User's Guide here: www.ti.com/.../sldu013a.pdf

    Also, there is some reference firmware that can be useful to look at here: www.ti.com/.../toolssoftware (At the bottom of the page).

    Regards,