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23 lines
1.7 KiB
Markdown
23 lines
1.7 KiB
Markdown
---
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title: LMC6482 - Rail to Rail OpAmp
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date: 2019-07-08
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categories: cool-chips
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excerpt: An excellent opamp for prototyping.
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header:
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teaser: /assets/img/2019/lmc6482.jpg
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gallery:
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- image_path: /assets/img/2019/piezo-amplifier.jpg
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- image_path: /assets/img/2019/clamp-overview.jpg
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---
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<sub>Written 8-19-19</sub>
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When I was just getting started using opamps late last year, I decided to buy a bunch of the most popular one, LM358. Little did I know about all the various specifications that I had to consider when picking the right opamp. At the time I was trying to amplify the signal for a sine wave encoder I was working on, but I hit a wall when the maximum voltage I could get out of the LM358 was around 3.7v with a 5v power input. It was then that I found out that I had to use a rail to rail opamp. Soon after though I was entering my senior year of high school, complete with a stressful college application season and engineering for upcoming SciOly 2018 competitions and team tryouts, so I set my tinkering aside for the time being.
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Enter EE16B lab section during my 2nd semester at UC Berkeley. We used opamps pretty extensively in that class for various purposes but one of the things I noticed was that we used an [LMC6482](http://www.ti.com/product/LMC6482), which was a rail to rail opamp. We were also forced to order a free sample of them which was pretty awesome. So I spent plenty of time with this cool chip. For me the most important feature is its rail to rail output, but a lot of other specifications, from CMRR to input current are also excellent.
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{% include gallery %}
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It is a little expensive though compared to an LM358, but TI’s sample program is pretty generous to students.
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