Electronics > Beginners
Single supply vs Dual supply op-amp?
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schmitt trigger:
Back in the good old days, systems required both “digital” and “analog” Bipolar supplies.

These added cost and complexity, and constrained its use on battery powered units.

Thus, there was a big push to develop opamps which operated from popular 5 volt digital supplies.
The very first requirement, besides maintaining reasonable performance at lower voltages, was that the common mode input range included ground, like the ubiquitous LM324/ LM358. That the output is capable of swinging very close to ground was an additional requirement.

As others have mentioned, the single supply families have spawned additional subcategories, like R2R and micro power, designed specifically for battery operated products.

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