• June 13, 2019

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The bad news is that you have to use individual transistors – you could make a plug in module, but getting an exact module is almost impossible. So, we reluctantly must withdraw these CA parts as our stock is depleted and in good faith, notify our customer base in time for last time buys. Figure 9 shows voltage gain as a function of frequency with tonerate of the CA For audio applications, the SSM works well.

Marketing BS usually only happens with parts consumers would buy, like tubes or speakers. Also, this appears to affect the entire CA line which, besides the four OTA’s, includes transistor arrays, opamps, video amps, amps with unusual circuit configurations and taps, special purpose radio and television circuits, and so forth.

I want to suggest that these chips are too important to retire. There are many audio electronics applications for theand while admitedly most audio is digital now, the analog alternatives are where the high-end markets lie.

CA (INTERSIL) PDF技术资料下载 CA 供应信息 IC Datasheet 数据表 (1/14 页)

This new device, the CAis useful in an extremely broad range of circuits in consumer anddifferential transducer amplifier applications. 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 datashet been lost. NTE seems the best hope. I don’t buy datadheet obsolete components from there. Get it while you can.


I want to use this one because they have a Pspice model so I can model it all in software, and TI still is selling this currently. That ebay item is from China. CA’ s for sale in batches of 50 on ebay, from Hong Kong just snatched up a bunch myself http: In this application, the CAA is operated substantially below its supply. Yeah, I’ve learned a wealth of info by repairing several issues with that amp.

Out of frusteration, I designed my own fill-in replacement for the ANP. The portion ofquiescent operating point for class A operation. This is also an opportunity to build a better discrete OTA. Thanks for signing in.

Somebody picking up the ? Do you know of any date codes to avoid with the Harris or Intersil parts?

Superb, and good bedtime reading. But the output is a current source instead of a voltage source. That wouldn’t be their style anyway. I’ll be happy to consult on such a datasbeet. Education is what you’re left with after you have forgotten what you have learned. It’s been thirty years, man; surely we can make some improvements.

Datasyeet you know if another company like the one that purchased the old fab equipment is considering carrying on producction when the current stock depletes? No problem in any other circuit, but in this particular one I got too much bleed-through with some chips.

Since there are no trimmers or presets to adjust gain or datasgeet, I imagine this circuit needs selectedprobably with transconductance within a certain range, to work “just right”.


CA3094 Datasheet PDF

And I have a significant number of additional applications in the pipeline. The CA improved on the performance of the CA through the, peak. The is clearly the most advanced and flexible. Peavey replaced the original part with LMN but that is now obsolete also. None of the other chips comes close in these areas, so if you can only support one OTA chip, that’s the one. The transistor arrays are certainly nice, but given how easy it is to hand-match transistors, I don’t see an array of less-than-great transistors on a chip as an especially compelling story.

So you may believe, or not – it’s your choice. I am trying to recall if there is a Phillips part that emulates the ‘, but I can’t think of the number. Of course I see that Texas Instruments is discontinuing it Is this a conspiracy. And in that also where it mattered.

Until then, it won’t appear on the entry. I’m reading this with interest, as I built two synth VCAs that use the CA and I had to pick through a whole bunch of chips I originally bought way back in the ’80s. From our catalog scanning project. So, the process is gone and is not worth the time and 10’s of millions to rebuild when today we are working with sub micron processes.

I don’t blame Intersil. So, I don’t know if those chips will work or not. You can’t dynamically compress or expand in digital without generation of rounding noise Datashete for passing my comments on.