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Is there anything like a wheatstone bridge IC in various resistances with pins to hookup the fourth resistance , and other connections ?

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    \$\begingroup\$ What's the point? It's resistors and a diff amp. It's like asking for an opamp where the resistors are built in. \$\endgroup\$
    – DKNguyen
    Mar 18, 2022 at 15:03

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You can buy resistor networks that are matched to each other, such as these:

enter image description here

.. which could form half a bridge. The temperature coefficient typically tracks to within +/-0.1ppm/°C, which is pretty good. They're fairly expensive (but, 'compared to what?', one might ask).

If you just need crude 0.1% or 1% tolerance on the resistors and commensurate tempco, tempco tracking and stability, it's a lot cheaper and easier to just buy 3 thin-film or thick film resistors and wire them up.

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  • \$\begingroup\$ ok thanks - did not know about the matched resistors \$\endgroup\$ Mar 18, 2022 at 16:31

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