REF194 has a current sink spec into the OUTPUT pin? If it has, what is the maximum sink current?
No. See figure 20 on the data sheet. The resistor divider is very high (>100k), so it will sink microamps.
The REF19x family was designed to be micropower, so if you need to sink you will have to buffer with
an op amp.
Thank you for supporting this case.
I'll use the REF194 as a surge clamp (4.5V clamp) so I need sink current function.
Do you have any device which has sink/source (both 30mA) function? If you recommend to use an op amp
to buffer, please send the schematic to me.
Some of the other refs will source 10-15 mA min, and sink 5 mA min, but I don't know of any refs that
will sink/source 30 mA. Maybe an AD8615 would work as a buffer; it depends on how close you
want to get to the rails. There might be another way to do a clamp.
The source and the sink current spec have not been decided yet. Would you show me a schematic using an AD8615 as a buffer?
??? Just connect it as a follower?
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