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OPA656: How to identify "high grade" parts

Part Number: OPA656
Other Parts Discussed in Thread: OPA814, OPA817, OPA818

I have a query about the OPA656 op-amp data sheet:

Table 7.6 on page 7 refers to the “high grade” version of the part. However, I have no idea how to identify high grade parts from the device part numbers. i.e. what part number suffixes signify the high grade parts? In other words, which parts listed in the Packaging Information table on page 25 are “high grade” parts?