Question
I am using the AD5292, accessed via SPI. However, there is need to extend theSPI-bus to a length of 2,5m. Sadly, the AD5292 doesnt recognize sent bitscorrectly most of the times. I would be grateful if you could provide me withinformation on how it might be possible to extend SPI-bus length, so that theAD5292 will recognize it. I already tried terminating the data link(series-resistor on transmitter side) and low-pass filter, but this doesn'timprove the signal enough.
Answer
Did you also verify if AD5292 is able to recognize the sent bits by using ashorter SPI bus?
Over long distances, the transmission cable could cause delay in the signal andalso due to the capacitance of the cable you will need to run the line atslower speed. This could solve the problem.
One more solution to this could be the use of shielded cabling, repeaters orSchmidt triggers.