• State
  • Locked Locked
  • Replies 2 replies
  • Subscribers 47 subscribers
  • Views 242 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

ADS8324: ADS8324 Set up?

HENRY JUNG
Expert 2030 points
Part Number: ADS8324

DEARS.

ADS8324 is being tested on the board we designed.

The maximum value of ADS8324 is output up to 1FFF (2^13=8191) and 2.5V.

IN (2.5 to 5V) indicates 8191 only.

How do I read from 0V to 5V?

Thank you

  • 0
    TI__Mastermind 24940 points

    Hello,

    This device used 2s compliment to display the polarity of signal, thus you will need to implement this in the master's method of decoding the output. If a measurement has an MSB of 1, is it negative, and if the MSB is 0 it is positive.

    This device is 14 bits, that means that there at 2^14= 16384 output combinations. but because it is a bipolar device, then the range is -8192 to 8190

    Within Coding Schemes for ADC, on page 6, this format is further explained.

    Regards

    Cynthia

  • 0 in reply to Cynthia
    TI__Guru**** 168485 points

    Hi Henry,

    Just to add a little more here, the ADS8324 Is not really characterized to 5V, please take a look at the Power Supply Requirements on page 3 of the datasheet.  Also, please take a look at Figure 10.  The input is meant to swing +/-Vref around Vref.  If you tie IN- to Vref instead of GND, you should be able to realize 2Vref on IN+.