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ads1248 problem

Sergei Triapkin
Prodigy 10 points
Other Parts Discussed in Thread: ADS1248

Hi !

ADS1248 does not give the willingness nor the DRDY, or DOUT / DRDY to the followingconditions.

1. Pin 1 - DVDD = 3.3V.
2. Pin 2 - DGND = 0.
3. Pin 3 - CLK = 0.
4. Pin 4 - RESET = 1.
5. Pin 22 - AVDD = 5V.
6. Pin 23 - START = 1.
7. Pin 24 - CS = 0.
8. Pin 28 - SCLK = 0.


The SPI adjustment is made.

  • 0
    TI__Guru** 113765 points

    Sergei,

    AVSS needs to be connected to the analog (AVDD) supply ground.   Also, you will need a reference.  The part defaults to internal reference off and not selected.  REF0 is the default reference (pins 5 and 6).  See MUX1 register information on page 42 of the datasheet.  Also, you need to connect a cap between VREFOUT and VREFCOM, and VREFCOM should also be connected to analog supply ground.

    Best regards,

    Bob B