PSoC questions

I need to have a plan to replace some parts from an IC supplier that seems to have supply problems. On of the approaches I'm starting to consider is PSoC to build the peripherals I need. Since I'm very new to this technology, I would appreciate an pointers to information on mixed signal devices (general info., suppliers, etc).

The requirements are:

  • ADC 12-bits, 8 or more inputs, single/diff. input, speed > 200KS/S
  • DAC 12-bits or more, 4 outputs or more, settling time < 5 uS
  • GPIO 32-bits or more, output mode drive low current LED directly
  • I/F Either SPI or fast parallel (near memory speed)

A processor is really not needed, but can be used if available.

Thanks, Dave

Reply to
Dave Boland
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A cypress PSOC can do what you're asking. It's going to take a little homework to configure it but once that is done, using a PSOC is easy. Check out

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for more information.

Ken

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Dave Boland wrote:

Reply to
kenlem

Do you want a microcontroller, or just a peripheral ?

The above it at the higher end of uC Analog performance, so look at the TI MSC12xx family, and the Silicon Labs C8051F families. The C8051F series have small models, with fast SPI, you could write a tiny SW driver to set as as peripheral SPI slaves I/O and ADC and DAC.

-jg

Reply to
Jim Granville

It does not work as well as a real 12bit A/D it is done by a combination of SW and HW.

MAYBE you have to read the data sheets

YES

YES

Reply to
Neil Kurzman

Analog devices microconverters have 16 channel 1000Ks/s 12 bit diff a/d's, 4 channel 12 bit Dac's, , plenty of GPIO on the larger versions and SPI. These have true 12 bit A/D's, not the crappy ones you usually see on most microcontrollers (its really an A/D with a processor built around it, rather then the other way around).

Probably one question you need to ask yourself are whats the voltage ranges of your inputs? If they are not compatible with the part you pick you need to add alot of voltage level translation circuitry.

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Reply to
joep

Something I didn't make very clear is that I want to try to get everything in one IC to save space and chip selects. I have spent a little time looking at the PSoC's and I doubt that I can do that, but I have more to look at and the technology is moving forward quickly.

A peripheral is fine. If I have to have a processor, them I will use it to do data filtering if possible.

Dave,

Reply to
Dave Boland

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