---
name: ee-opamp
tags: ee-part, ee-opamp
---

# `ee-opamp` Amplifier
* bipolar (dual) power supply of 12V: +/-12V

 [:link:](https://electrosome.com/opamp/)

## "Jellybean"
* Jellybean: ubitquitous (many sources), many package types, idential pin-outs across manufacturers, cheap, long time around
* Goal: do not push the spec -> variants don't matter (e.g., A or B versions)
* LM358 (AoE: "single-supply jellybean")
* FET Input TL071/72/74
* CMOS LMV358
* LM324 (quad-version of the LM358)
* OP07 (precision)

## common mode (CM)
 $V_{IN+} = V2$, $V_{IN-}=V1$

https://electronics.stackexchange.com/questions/105005/what-is-the-common-mode-in-common-mode-input-voltage-range

## rail-to-rail
* "an op amp whose dynamic range is able to reach the extremes of the supply voltage. This can refer to either the output or both the input and output." https://electronics.stackexchange.com/questions/224159/what-does-rail-to-rail-output-opamp-mean
* LM741: NOT rail-to-rail (eg. +/-20V suppply -> +/-16V range)
"a single +5V supply leaves no dynamic range at all: the output is generally stuck in the middle"
* datasheet: *Output Voltage Swing*

{%youtube uq1DMWtjL2U %}
* ``
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