I find missing codes on AD7606.
I use different configurations making this same observation: internal ref, external ref, range 5V, range 10V, change of equipment to source the input ramp, change of equipment to capture codes, change of separate equipments to force Avcc and vdrive, conversions @200 kSps, 100kSPS, and even 24Sps. Internal ref and external reference have 10µV VAC. Trials with other parts.
My test card is routed with layout guidelines found in datasheet
Ramp is slow enough to theorically have 15 same consecutive conversions.
Trials have been done between codes 2000 and 19000. I never have any missing codes between 2000 and 9000 but between 9000 and 19000, I always have about 500 missing codes.
If somebody has ever encoutered missing codes on ad7606, I would be so happy to chat with in order to solve this mystery :)
[edited by: Lluis at 3:37 PM (GMT -4) on 7 Sep 2020]