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Problem with ADS1231

David Area
Prodigy 20 points
Other Parts Discussed in Thread: ADS1231

Hello All:

I'm working with a ADS1231 and I have a problem.

I have connected the DRDY/DOUT pin to the SPI MASTER IN pin of mi MCU and also to a Digital IO pin to check the state of DRDY. The problem is that I always read a HIGH value in the digital PIN. In the datasheet I can read that when the conversion is ready, this pin go to LOW value and at this moment I can read the 24 bits.

I don't understand why I always read a HIGH value. I maked the connections acording to the weigh scale application example.

Any suggestion about my problem?

Thanks in advance for your help.

  • 0
    TI__Guru** 113765 points

    David,

    It sounds as if your device is not converting.  Missing detail about connections from figure 23 is the CLKIN pin.  You must either ground this pin to use the internal oscillator, or provide some other external clock source.  The figure only refers to the pin number being grounded, along with AGND and DGND .  Also, the PWRDN pin must be logic high.

    Best regards,

    Bob B