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How can I use channel 0 of LMP90100 using LMP90100 EVB ?

Ayanga Kalupahana
Prodigy 210 points


Hi, 

  I want to connect voltage output sensor to channel 0 according to demo 3 of sn029. Am I have to connect VINP to J5 and VINN to J7? Then, for the interrupt, is it just a connection between an interrupt pin of my controlling micro controller and 1 st pin of J8 ? Are there any jumpers to set ? Is there any example on interfacing external sensors to evaluation board ? I am using Arduino with SPI interfacing.

Ayanga

 

  • 0
    TI__Genius 16890 points

    Hello Ayanga,


    The code shows that channel 0 is using VIN0 and VIN1.  You can connect VINP to VIN0 by using pin 2 of JP10 or J5.  VINN can be connected using pin 4 of JP10 or J7.  The jumpers on pins 1 - 2 and 3 - 4 of JP10 (if installed) need to be removed.  If there are jumpers on pins 3 - 4 and pins 9 - 10 of JP11 they should be removed also.

    Yes, the DRDYB is on pin 1 of JP8. 

    A sensor that outputs voltage can be connected directly to the pins.  There are examples in the datasheet and in the Webench design tool.


    Mike

  • 0 in reply to Michael Stout
    Prodigy 210 points

    Hi Mike,

      I did all these but what I get as ADC value is 2 all the time whether I connect the sensor or not . I think this is garbage value. I need to solve this . 

    Ayanga