• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 47 subscribers
  • Views 121 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

DAC53204-Q1: Daisy chain used

liping pan
Intellectual 730 points

Part Number: DAC53204-Q1

I just use one SPI to connect 12 pcs DAC53204-Q in daisy chain.

Should it work?

What's the maximum spi clock could be used?

  • +1
    TI__Guru** 100815 points

    Hi,


    There shouldn't be a limitation to the number of devices in a DAC53204-Q1 daisy chain communication. 12 device in the daisy chain should be work.

    However, there is a limit on the SPI frequency for devices in a daisy chain and the frequency is significantly slower than normal SPI operation. The maximum frequency for SCLK is listed on page 11 of the datasheet in the tables of Sections 6.13 and 6.14 (each in the first row).

    For FSDO=0, SCLK max is 1.25MHz
    For FSDO=1, SCLK max is 2.5MHz

    The FSDO=1 setting advances the SDO data half an SCLK pulse, so the first Bit 23 is setup at the falling edge of /SYNC.


    Joseph Wu