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ADS1119: ADS1119

Andre Luiz1
Prodigy 10 points
Part Number: ADS1119

Hello,

I'm using an IC ADS1119 and I have some problems with operations.

The pins A0 and A1 are connected to GND, so the I2C address  I put is 0x40 (one shift to left, 0x80). The ADC will operate in continuous conversion mode .

First: When I send the RREG 0x20 command for sanity check it does not read back any value, the return is only 0.

Second, the DRDY output stays high all the time, it never falls low.

Any idea about how to solve these problems?

Thank you!

  • 0
    TI__Guru** 113765 points

    Hi Andre,

    Welcome to the E2E forum! Keep in mind that if you read Configuration Register the default register setting is 0x00.  This default setting will operate the ADS1119 in single-shot conversion mode.  If you issue the START command, you should see DRDY transition from high to low.  The START command will need to be issued each time you want a conversion while in single-shot mode.  If you want continuous conversions you will need to write the appropriate setting in the Configuration Register.  You will also need to issue the START command to start conversions, but thereafter you should see DRDY toggling at the data rate set in the Configuration Register.

    If you change the Configuration Register settings with the WREG command, then you should be able to read back using the RREG and see the value change from 0x00.

    Best regards,

    Bob B