ads1298 external clock for driving multiple ads1298 in standard mode for continuous conversion is a buffer needed or used in any documentation?

Hello Josh,

You would need to verify the output drive capability of your external oscillator (review the manufacturer's datasheet) to determine how much drive strength it has. You would then need to base your decision on clock buffering/distribution by looking at the total number of parts you're trying to synchronize. A device like the CDCLVC1108 would be one means of sharing the clock among eight ADS1298 devices, for example.

Regards,

Michael

Ok now what is the drive capability of the ads1298 internal osilator taking that osilator to a external pin?

I would like to take that ads1298 and drive 7 more ads1298 chips.

Then what would make me decide to buffer that clock source what range and what values?

Hi Josh,

The ADS1298 can provide about 500uA.  Layout and trace width/length is going to have some impact as well.  For your first prototype run, I would recommend placing a footprint for buffer and add a bypass path.  Basically a means to remove the buffer from the circuit - try it with and without buffering.  Let us know how you make out!

ads1298 clock output is it the same as digital output, as shown on page 6, of the data sheet, current=I output high and output low 500 uA input current 10 uA so driving 8 should work?