• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 46 subscribers
  • Views 204 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.

ADS7828E pullup voltage

Kiyoung SON
Intellectual 515 points
Other Parts Discussed in Thread: TXS0102, ADS7924

Dear TI-er.

My customer is designed ADS7828E & MCU.

ADS7828E is using 3.3 voltage power supply.

MCU is using 5 voltage power supply.

Generally, Pullup resistor of I2C line is 3.3 voltage power supply.

but, It is designed 5 voltage power supply.

Do this have issues ?

Plz help me.

  • 0
    TI__Mastermind 49405 points

    Hello Kiyoung,

    Unfortunately the digital inputs can not exceed the VDD voltage on this device.  The Absolute Maximum Ratings table of page 2 specifies the max digital input voltage as +VDD+0.3V.  

    You could operate the ADS7924 with VDD=5V or alternatively place a voltage level translator device between the MCU and ADS7924.  A bidirectional voltage-level translator for open-drain applications  such as the TXS0102 series works well with I2C interface devices.

    Best Regards,

    Luis