Help with LIFA and TI ADS8319

[yiipmann]

Can you please tell me the value of R7 that you used ? Also did you physically use the resistors R2,R3,R4 and R5 on your hardware board ? Or did you connect your SPI connections directly to the micro-controller ? Because i am connecting them directly, may be that could be a problem.

[aazswapnil]

R7 is 5 Ohms, as the datasheet suggests. And yes, I did use R2-R5, 100ohms each. But they are not necessary for the SPI transfers to work. I put them as protection resistors, as I had 25 ADCs sharing same SPI bus.

[yiipmann]

After lots and lots and changing values for resistors and capacitors and checking connections, i came to find out that my micro-controller ground was not at the same level as the ADCs ( i had already connected its ground with my circuit board ground but there was some kind of problem ). When i soldered the controllers ground just near the ADCs ground, both the ADCs started working properly.

Thanks alot aazswapnil for your help ! i really appreciate that.

[aazswapnil]

You are welocme.