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The US is the largest exporter of industrial controls – which use lots of linear ICs. It has an OTA and a buffer so seems perfect for filters.

Maybe this is why the chip industry is going to china! And I’m sure the CA hasn’t been their top seller. The guys who the fab was sold to? Cw3094 tried, too, to persuade Intersil to keep at least the CA, which I use often.

CA , Tube CA; Röhre CA ID, IC – Integrated

Too late; the plant somewhere in Ohio is gone, Intersil told me. I will pass on your concerns but please understand, these CA family of products were developed by RCA on a very old and obsolete fab process that is long since been discontinued and the fab plant was shut down and sold off. By LeftyStrat in forum Guitar Effects. Problem is that such adjustment instructions are not used or applicable here, but much worse, not even Test Point voltages are shown.

I have had a problem with this chip for almost 11 years. I had already seen those in your eBay link, but I’m not confident enough to purchase until I can get some further expert advice based on personal experiences with subbing for these chips.

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We need to insure we have enough product remaining to support the life time buys that are now dataeheet. None of the other chips comes close in these datasjeet, so if you can only support one OTA chip, that’s the one. Or would Intersil consider introducing an improved 21st century version of the the CA, made in a modern fab? Bookmarks Bookmarks Digg del. The is clearly the most advanced and flexible. And I have a significant number of additional applications in the pipeline.


Look at the data sheet, it is an dtaasheet amp with an output transistor. If you look at the data sheets for CA and CA, they aere similar enough that one would work for the other unless a certain feature was used.

In summary, I think it would be a big win to keep the CA in production, for all the standard business reasons, but also because the chip is culturally and educationally important, and it would give Intersil a great repuation. Originally Posted by km6xz. For audio applications, the SSM works well.

The Dtaasheet has been discontinued. Use the LM; it’s not as good, but it’s still in production and second sourced. Eventually, I figured out how to make a cancelation circuit, and my VCA is now in the testing stages. There are not many alternatives available from other manufacturers. They could just as easily left everyone hanging.

There has been a lot of fearmongering from the electronic music crowd for a long time about electronic music parts going out of production. Ca304 might do that; it could have a lower noise input stage, built in exponential conversion for the programming current, a better linearization circuit, better current mirrors, that sort of thing. They claim their original and later on the LMN were “selected” for those roles. You can’t dynamically compress or expand in digital without generation of rounding noise Lab Series amp L5 uses a similar OTA circuit, but they made it adjustable, as in “inject xxx mV audio at the input, adjust output trimmer to 1.

Post a datasheeh Thanks for signing in. Somebody picking up the ?

CA IC DATA REQEST – Datasheet/Parts requests – Community

I didn’t look yet. By the way does anyone know if there are pspice models for CA or ?? Originally Posted datashheet g1. NJR wanted to know my annual usage of the ‘ It’s been thirty years, man; surely we can make some improvements. The is also capable of functionally replacing any of the other OTA models, ignoring the obvious pin-compatibility issues. Until then, it won’t appear on the entry. Ordered a couple from each source, thanks guys.


Datasheet «CA3094»

Or something like that; I was napping at the time. Let’s raise the bar a little, shall we?

The closest thing to astill in production or recently enough is the LM and If you’re making a ‘s based synthesizer, you can use many different VCA circuits. This new device, the CAis useful in an extremely broad range of circuits in consumer anddifferential transducer amplifier applications. Originally Posted by MarkusBass.

I just got off the phone with Grant Brown and he reiterated that same position but also added “the recipe we used to select those OTAs has been lost.

So you may believe, or not – it’s your choice. Note that you can achieve very respectable dynamic range with this part, and that it will operate on just a few volts and with very little current.

Small and compact means unreliable and unserviceable. I want to suggest that these chips are too important to retire.

Try to get other foundries to manufacture OTA chips. The stupidity of the IC industry is that they neglect to understand that the VCA is one function that does not work well in digital. I don’t blame Intersil.