1.8V opamps <15c/channel?

Joerg · 2006-02-02T19:45:57+00:00

Hello Folks,Went up and down the mfgs, except for some EU ones because of crummy web sites. What I am looking for: Opamps that can run between 1.8V (without actually becoming marginal right there) and 3.5V or more. Single, dual, quad, whatever but under 15c bulk price per channel and not above 40c for the whole chip if it's a quad. From a mainstream mfg, not a boutique part that might go obsolete in a few years. Can be slow, lots of offset and so on. Up to 0.5mA/ch quiescent would be ok.Sure, I could do it discrete. Again. But what's the big deal about scaling a run-of-the-mills 36V opamp into a process that enables it to run on a couple of AA cells? Why are all those 1.5V and 1.8V amps so freaking expensive? More profit margin?There are plenty in the 2.7V min category but not every device can have the luxury of a Li-Ion battery.Regards, Joerg

Feb 02, 2006 22 Replies

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Joerg 20 years ago

Hello Jim,

Sounds like the big three. Then crude oil doubled in price and now they are sitting on their 'more profitable products' while Toyota, Nissan and Hyundai are having a field day.

Regards, Joerg

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RST Engineering (jw) 20 years ago

Thems are most often the funnest ones. Anybody can build a circuit with a gold soldering iron.

Jim

"Jim Thompson" wrote in message news: snipped-for-privacy@4ax.com...

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Joerg 20 years ago

Hello Jim,

The funnest ones are those where you replace some obsoleted big-$$ item, such as a $15 FPGA. Last time I did that they asked in the design review "So what's it cost?". "Buck-thirtyfive".

The most striking one was where I kicked out three silicon digital delay lines totaling about $200. They also happened to be quite a purchasing nightmare. The (mostly analog) circuitry that replaced them cost about $2.50 and the phase noise went way down. Only jelly bean parts, the client could buy them on every street corner.

Regards, Joerg

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