Hi all,
I want to interface my PIC uC with external ADC, I want to know which is more easy and better a serial ADC or a parallel ADC?
Thanks
Serial or Parallel ADC?
Mar 24, 2005
7 Replies
First reply
You better check your ADCs, serial, SPI type are faster that parallel types. Those used in DSP applications are all serial(SPI) type.
Read the full reply
Its usually better to use a PIC with the ADC built in.
Luhan Monat (luhanis 'at' yahoo 'dot' com)
"The future is not what it used to be..."
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You better check your ADCs, serial, SPI type are faster that parallel types. Those used in DSP applications are all serial(SPI) type.
Rene Tschaggelar wrote:
Slower ADCs use the serial interface while faster ones are connected in parallel.
Rene
Ing.Buero R.Tschaggelar - http://www.ibrtses.com
& commercial newsgroups - http://www.talkto.net
Provided the internal ADC is up to the required specifications. Though not that bad, it is limited.
Rene
Ing.Buero R.Tschaggelar - http://www.ibrtses.com
& commercial newsgroups - http://www.talkto.net
If SPI can keep up with the ADC output, then the ADC is not fast, in my book.
I don't know what problem domain you are used to working in, but all the fast ADC's I am familiar with are parallel. It wouldn't be all that practical, in my opinion, to do a 14-bit 100 MHz ADC as a serial part, and of course it would be impossible for SPI.
--Mac
If one were better than the other on all aspects only one type would be sold.
Note that there are aslo lots of serial variations (SPI, ICC, I2C,
1-wire, etc)Wouter van Ooijen
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Hi
I have used a 11 I/P 8 bit serial ADC on a PIC 16F84 quite successfully. Serial uses less uC pins so you can the PIC for other things. I had mine driving a LCD & RS232 chip as well. The programming is slightly more difficult though as you have to program & count address pulses, clock pulses & read out the serial data. Parallel stuff works in bytes (or nybbles) which are usually easier to program
Hope this helps & not too late,
Chopper
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