AnsweredAssumed Answered

I am using 7124-4.

Question asked by hahmin on Jan 14, 2017
Latest reply on Jan 18, 2017 by hahmin



I made same board from CN0376-SDPZ REV B. 


When I get a thermocouple value from that boad, I have to use cold junction temperature.


The CN0376-SDPZ has NTC thermister. When I use software from ANALOG DEVICE, I can get the cold junction


temperature. The NTC thermister is connected through AIN5, AIN6. 


so, I transmitted setting packets. like this:


0x0A, 0x10, 0xA6      (CHANNEL-1)

after delay 10ms,

0x1A, 0x01, 0xF7      (CONFIG-1)

after delay 10ms,

0x22, 0xE6, 0x07, 0xFF (FILTER-1)

after delay 10ms,

0x03, 0x00, 0x12, 0xA0 (IO_CONTROL1)

after delay 10ms,

0x04, 0x80, 0x00 (IO_CONTROL2)


And when I send this message ( 0x01, 0x01, 0x84  and 0x42, 0x00, 0x00, 0x00).

I got some datas from the 7124-4.


But the value is strange.

When I put 0 ohm, and 10K ohm instead of the NTC thermister.

The value have to change between 0 ohm and 10K ohm. But the value is nearly same.


I guessed my sending message was wrong.


If I get a right value from ad7124-4, what do i send messages?


help me.


Thank you for reading my question. ( I am sorry my foolish English).