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Voltage refrences
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OM222O:
Hello
I purchased a few different voltage reference ICs (2.048v) and I'm quite happy with their initial accuracy value, but they have a TRIM pin which they recommend to connect to a voltage divider circuit. I was wondering if I must connect it to a circuit in order for the chip to work or if I can just not connect it to anything(or maybe connect it to the Vout pin or ...)  :-//

I'm specifically asking about ADR440BRZ (https://www.analog.com/en/products/adr440.html) but I also have a few from TI (for example the REF5020).
They don't mention it anywhere so a bit of help would be great. Thanks!
JackJones:
Usually trimming would be optional, unless specifically stated that it is needed. If you look at page 15 and figure 36 it shows a basic configuration with trim not connected. So you can leave it unconnected unless you want to get fancy.
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