The minimum load resistance IS NOT a function of voltage. It probably has something to do with compensation.
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The minimum load resistance IS NOT a function of voltage. Yes this is primary function of current and for full resistive load is current function of voltage.
Because this entry does not contain any defined conditions such as frequency, etc. is your consideration of the internal compensation of a purely purposeful fantasy.
Exactly what should not be in the datasheet.
Amplifier can be modifed as buffer, PGA or general amplifier with external coupling,. can works for full DC until 8MHz (G=1).
For DC is Rload 4k Ohm on 2V the same as 2k on 1V.
By the way ILOAD Drive current ,Operational amplifier output should be fully bidirectional and current +- 500uA an not +500uA as how in in the datasheet.
Finally
In OPAMP specification ST write
TS_OPAMP_VOUT ADC sampling time when reading the OPAMP output = min 400ns.
ADC max Rain in for 400ns in Slow channels is 2,9kOhm
ADC max Rain in for 400ns in Fast channels is 3,9kOhm
ADC max Rain in for 400ns in other channels is 2,2kOhm
all this value is under Rload min 4kOhm :grin:
so actually ADC cannot be used as a buffer for ADCs running at 2.5MSPS even though the datasheet claims it