AnsweredAssumed Answered

ADuM1251 shows no reaction

Question asked by NiklasM on Dec 4, 2014
Latest reply on Dec 17, 2014 by NiklasM



in my project i'm working with an ADuM1251.

Following picture shows my setup.


The microcontroller is connected on PIN 2 and PIN 3. On PIN 6 and 7 four I²C Slave-Devices are connected.

If i start my demo program, i monitoring the signals on PIN 2 and 3. I see the clock and the data, but i dont get an ACK from my slave device. I can not even see the data and clock signals on PIN 6 and 7.


Thus my question, is my setup so far okay?

If it is okay, is the ADuM1251 broken? I measured the Resistor R9 and the Ohmmeter shows ~620Ohm. At all other Resistors the value is ~4k7Ohm.


Thanks for your help.