Question: AKM Asahi Kasei dac chips with the letters EQ on them

[shocker]

AKM Asahi Kasei dac chips with the letters EQ on them,
Do they all have those letters after the chip's name number? do some have it? and if some have it, is there or are there differences between those that has it and those who not?

Thank you.

 

[mansr]

Here's their current DAC catalogue: https://www.akm.com/akm/en/product/detail/0021/
Some have an EQ suffix, most do not. Only a few numbers have more than one suffix. From a quick look at some of the datasheets, it seems like the final letter indicates the package type, Q being QFP variants. I'll leave it to you to figure out the meaning of the first letter.