Other Parts Discussed in Thread: ADS8584S
Hi,
I'd like to use an ADS131A04 AD converter in a one-shot fashion, synchronous with a trigger event generated by a microcontroller.
If I'm not mistaken, I can use the ADC configured in synchronous slave mode, with DRDY pin connected to a micro controller GPIO pin (as explained in datasheet at section "10.1.3.3 All Devices Configured in Synchronous Slave Mode").
When I need a value I can toggle DRDY pin, and after waiting 3 complete conversion cycles the digital filter will provide a fully settled and valid data, that I can retrieve with SPI; after that when I need another value I can provide one more DRDY pulse (surely not synchronous with the previous one) to reset the filter and start a new conversion.
Is it right?
But here I need some important informations, that are missing in datasheet:
- which are the minimum DRDY "on-state" and "off-state" pulse width that I can feed?
- how can I know when new data is ready to be retrieved?
- the output buffer is overwritten when a new conversion is completed? even if I do not read the data from the SPI interface?
Many thanks,
Marco