Same die fabrication process AD9246 and AD9246S?

Hi jbarth94 

Thanks for your interest in AD9246.

Both AD9246 and AD9246S is a 0.18um CMOS process technology.

Wafer fabrication process is available on the "Wafer Fabrication Data" site of Analog Devices. Please see Wafer Fabrication Data | Analog Devices.

Hi jbarth94 

Thanks for your interest in AD9246.

Both AD9246 and AD9246S is a 0.18um CMOS process technology.

Wafer fabrication process is available on the "Wafer Fabrication Data" site of Analog Devices. Please see Wafer Fabrication Data | Analog Devices.

Thanks, I was moreso wondering if the die was functionally identical. I have a project that wants to use the AD9246, without concern for total ionizing dose, but there is no radiation test data for that part. If the silicon is identical, then I may be able to approve some allowances based on the single event effect performance oof the AD9246S.

Hi jbarth94 

The goal with the aerospace grade version of the product is to maintain as much as possible the same or similar performance as the commercial product. The available commercial models (AD9246) should be a good approximation of performance for the aerospace grade models (AD9246S).  Although, there are minor differences so I would encourage you to do at least a quick comparison between the data sheets for the two model versions of the parts to understand the minor differences and evaluate how they may affect your application in particular.

Hi, following up on jbarth94's question: is it the same die? For an initial low-cost breadboard in progress with a plastic part to look at functionality, we don't want the plastic part to uncharacteristically out-perform the 9246S flight part.  Basically the datasheets don't appear to allow for direct comparison. The AD9246 datasheet does not show all the mins and maxs for parameters at 25°C. so for example cannot compare the 9246 "Typical"(only) SNR of  71.7dBc @ 25°C at fIN=70MHz... with the minimum SNR for the 9246S of 65dBc for "GroupA subgroup4"(equiv 25°C temp). When the min or max are given in the 9246 commercial datasheet "Full" specs are with respect to –40°C to +85°C and the 9246S SMD specs are with respect to -55°C ≤ TA ≤ +125°C so appears cannot make a one to one comparison there either due to known temp dependencies of parameters. Specifically: 1.a) if we were to run the commercial 9246 & space 9246S both at 85°C what would their ENOBs be? 1.b)similarly if ADI hypothetically hand-pick a 9246 capable of 125°C (like die for S) would commercially packaged part's ENOB be 9bits (as 9246S's is)? or does hermetic packaging affect SNR etc. & ENOB?    2.) for the Data Propagation Delay(and similarity setup & hold times): the 9246 has max of 4.8ns @85°C while 9246S has max of 9ns(which is longer than clock period)@125°C. presumably the difference is both temperature dependence and the wire bonds & hermetic packaging of the flight S part. What is the max data propagation delay of the 9246S at 85°C?(allows direct comparison and we will not operate above 85°C. but if you have data at 60°C that would be most representative for our eventual space application.  Is it possible to please provide data for both parts to allow a direct comparison of all parameters?