| Electronics > Beginners |
| Common/interesting ICs/opamps/etc |
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| AnyNameWillDo:
Previous thread: https://www.eevblog.com/forum/beginners/purchasing-parts-and-basic-components-for-a-new-lab/ Making a new thread dedicated to this topic since it's sufficiently vast topic unto itself and more focused. Would appreciate some feedback if the following list would be a good cover of common/interesting op-amps and ICs to learn from / get acquainted with: Current list of opamps/ICs/microcontroller -- thoughts? 74HC595 https://www.digikey.com/product-detail/en/texas-instruments/SN74HC595N/296-1600-5-ND/277246 ATTINY85 https://www.digikey.com/product-detail/en/microchip-technology/ATTINY85-20PU/ATTINY85-20PU-ND/735469 CA3130 https://www.digikey.com/product-detail/en/intersil/CA3130EZ/CA3130EZ-ND/1060748 CA3140 https://www.digikey.com/product-detail/en/intersil/CA3140AEZ/CA3140AEZ-ND/821386 CA3240 https://www.digikey.com/product-detail/en/intersil/CA3240EZ/CA3240EZ-ND/821389 CD4017 https://www.digikey.com/product-detail/en/texas-instruments/CD4017BE/296-2037-5-ND/67253 CD4066 https://www.digikey.com/product-detail/en/texas-instruments/CD4066BE/296-2061-5-ND/67313 LM234 https://www.digikey.com/product-detail/en/texas-instruments/LM234Z-6-NOPB/LM234Z-6-NOPB-ND/149003 LM317T https://www.digikey.com/product-detail/en/stmicroelectronics/LM317T/497-1575-5-ND/591677 LM318 https://www.digikey.com/product-detail/en/texas-instruments/LM318N-NOPB/LM318N-NOPB-ND/6180 LM324 https://www.digikey.com/product-detail/en/texas-instruments/LM324N/296-1391-5-ND/277627 LM339 https://www.digikey.com/product-detail/en/texas-instruments/LM339N/296-1393-5-ND/277628 LM340 https://www.digikey.com/product-detail/en/texas-instruments/LM340T-12-NOPB/LM340T-12-NOPB-ND/6233 LM350 https://www.digikey.com/product-detail/en/on-semiconductor/LM350T/LM350TFS-ND/458688 LM358 https://www.digikey.com/product-detail/en/texas-instruments/LM358PE4/296-36107-5-ND/1510269 LM386 https://www.digikey.com/product-detail/en/texas-instruments/LM386N-4-NOPB/296-43960-5-ND/148192 LM431 https://www.digikey.com/product-detail/en/on-semiconductor/LM431ACZX/LM431ACZXCT-ND/3504464 LM7805 https://www.digikey.com/product-detail/en/texas-instruments/LM7805CT-NOPB/296-47192-ND/3901929 SE555P https://www.digikey.com/product-detail/en/texas-instruments/SE555P/296-9684-5-ND/380221 TL071 https://www.digikey.com/product-detail/en/texas-instruments/TL071CP/296-7186-5-ND/378372 TL072 https://www.digikey.com/product-detail/en/texas-instruments/TL072IP/296-14997-5-ND/563039 TL074 https://www.digikey.com/product-detail/en/texas-instruments/TL074CN/296-1777-5-ND/277423 TL081 https://www.digikey.com/product-detail/en/texas-instruments/TL081CP/296-7203-5-ND/383030 TL082 https://www.digikey.com/product-detail/en/texas-instruments/TL082CP/296-1780-5-ND/277630 TL084 https://www.digikey.com/product-detail/en/texas-instruments/TL084IN/296-7213-5-ND/378408 TLC2272 https://www.digikey.com/product-detail/en/texas-instruments/TLC2272CP/296-1812-5-ND/277457 TLC2274 https://www.digikey.com/product-detail/en/texas-instruments/TLC2274CN/296-7129-5-ND/378527 UA741CP https://www.digikey.com/product-detail/en/texas-instruments/UA741CP/296-11107-5-ND/382197 |
| JS:
A short description at the side of each component might help to look at the list... like quad opamp jfet input for the TL074 and TL084, which are both exactly the same and not much point into having both stored while one would do. Originally they where low power (TL06X) low noise (TL07X) and low cost (TL08X) but low noise and low cost doesn't keep the difference anymore, compare datasheets and they have the same noise specs and likely every other as well. TL06X are lower power indeed. Also, I wouldn't store many 741s (I do have a bunch but only use them when I need an opamp with no restrictive specs, not having them wouldn't hurt) but I do like to have some OP27 for really low noise, low offset and low drift (without getting into choppers) and NE5534 and NE5532 are nice opamps, great for audio, low noise and high GBW product, useful in many things. I'd also like right now to have some faster opamps at hand but those are more dedicated for a particular project so sometime you need to go to a store. You always do because you always miss the right connector or something but it's really nice to run prototypes from what you have in the bin... I do that many times but I've been doing this for over a decade and my bin is quite deep by now. I build it slowly buying a lot of the values I needed for a project, if I need one 1 buy 10 and so on, doing so in a blind way without knowing what are you going to do it's much harder, useful parts depends a lot on the application, from ICs to the range of resistors you most often use or the type of capacitors you will be wanting to have. JS |
| Kleinstein:
The TL431 is the more common version of the LM431 - otherwise essentially the same, especially now that Ti bought NS. The LM234 is just another voltage regulator. Why the extended temperature range version instead of the simple LM334 ? Similar there is little need for the higher grade SE555 instead if the more normal NE555. Similar the TLC227x are upgraded versions of the more common TLC27x. Unless one needs the higher voltage, they can also replace the CA3140/CA3240. The NE5534/NE5532 are kind of an alternative to the the LM318. I am kind of missing a 5 V RR OP like MCP6001/6002 or similar, which is very handy in combination with the µC. |
| rstofer:
I wouldn't buy any of them if I didn't have an immediate application. When I did have a project, I would buy what I needed plus a few extras and they will be here in 3 days. I have a bunch of microcontrollers and various interface chips that I will never use. The technology changed out from under my inventory. For example, I used to like the PIC 16F877A but I'll never use one again. Times change; the Arduino, and the ATmega328P, are a lot easier to use. I don't have a favorite op amp but I used a bunch of TL081 on a small analog computer so I think they're pretty handy. For single supply, I like the TLV247x family. Figure 4.7 (see link below) shows the difference in output near the rails versus other devices. If you haven't read this, you might want to start. No hurry. It is an excellent reference for op amp circuits and circuit analysis: http://web.mit.edu/6.101/www/reference/op_amps_everyone.pdf Everybody is going to have their favorite chips. Some with good reason, some just because it's what they have on hand (my reason). Most of the hobby work is based on 'copy and paste' and the projects work better if the entire BOM is copied. I would buy for the application. Plus a few extras. |
| Benta:
Concerning your list of op amps, it's an extreme overkill. You've probably collected the part numbers from articles and application notes, which is an OK approach to start with. But basically you only need two parts in your arsenal: 1: a low power rail-rail input and output amp that will run at 3...15 V single supply. 2: a high speed unity-gain stable amp that will run at 5...+/15 V. With these two parts you can do almost everything and they will replace all of the parts you have on your list. If you want to do cost reductions later, you can try to optimize. But for prototypes and experimenting, nothing more is necessary. I'd suggest buying dual amp parts. Yes, you'll need two to replace a quad, and you'll waste one amp if you just need a single. Who cares, the cost of a dual is only marginally higher than a single. My personal favorites are LMC6482 and LM6172, but there are others, of course. Take those two as a starting point. |
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