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I'm trying to determine the max output current of the OPA1664 with a +-12v supply. The data sheet refers you to the typical characteristics graph. Operating conditions are VS+-15V, Rl=2k unless otherwise noted, but the output voltage vs. output current graph on page 12 shows output voltages of -+18v up to over 30ma.
Bob,
The typical OPA1664 output current vs output swing from the rail is not a function of supply voltage. Therefore, the voltage swing from the rail depends only on the output current and temperature - see below. Thus for +/-12V supply all the curves shown below should be shifted (depending on sinking or sourcing) by +/-6V (18V-12V) resulting in the output swing of around +/-11V with output current of up to +/-30mA.