AnsweredAssumed Answered

AD7124 Dout level

Question asked by hahmin on May 6, 2016
Latest reply on Jan 12, 2017 by hahmin



I want to use ad7124-4. So I bought the EVAL-CN0376-SDPZ boad. And I'm testing.


Firstly, I use the the EVAL hardware, and I want to control this device through STM320F28335.


SPI pin's /CS, MOSI, MISO, CLK are connected.


I set channel, config, filter, error, adc as follows.



0x09, 0x90, 0x23



0x1A, 0x09, 0xF7



0x22E6, 0x07FF



0x07, 0x00, 0x00, 0x68



0x01, 0x01, 0x84


final read action as follows:

0x42, 0x00, 0x00, 0x00


But, the Dout level from AD7124 is too low. So the 28335 could not read the data well.

I just see gabage datas...


I attach the scope picture when I read the datas.


yellow line: /CS,

green line: CLK,

blue line: SDI (MOSI)

pupple line: SDO (MISO)


the SDO data from AD7124 is too low..


What did I do wrong?



I waiting for apply..