| ??? 12/23/10 21:25 Read: times |
#180265 - DSP PROCS Responding to: ???'s previous message |
Andy Peters said:
As the others have said, you are not going to get a modern speedy part in a DIP40 package. However, with a decent soldering iron, some 0.025" solder, solder wick, and a magnifying lens, you should be able to solder a QFP onto a board no sweat. Really. Hi Andy, Well thanks for that and yes, I know the trend is smd's but manufactures still produce through hole components 20 years on. I'm going to attempt at using the new AVR xmega(smd) sometime in the new year. Andy Peters said:
As for the speed thing in general, the SiLabs C8051F120 can run at 100 MHz and it has a MAC with 16x16 multiplier and 40-bit adder that can do the math in two clock cycles (50 Mips). And it has a 12-bit 100 kS/s ADC. Some of their parts in the F360 series have the MAC, too. Drool, drool and drool again, I first noticed the Silabs when they were called Cygnal about 8 years ago and yes they were then way in front of anything around at that time, their on board peripherals were/are excellent but they are just too expensive and difficult to prototype. Andy Peters said:
I think if you want to do DSP, you should maybe consider using a specialist part such as an Analog Devices SHARC or BlackFin or a TI TMS320 device. Most of those devices run rings around microcontrollers (clock speeds up to a Gigahertz). Of course, absolutely none of them come in through-hole packages (see the trend?) and the tools are frighteningly expensive. Currently, I have an LCR meter ticking away on my work bench, I have very recently designed a board for it on my pc but I've yet to make the board, this meter is using the AT89C51ED2 running at 5 mips, sampling is around 6.25ks/sec (x2 channels) and it is working satisfactory, but more speed would be very nice which is why I hope to get my hands on the xmega in the new year, 32 mips is plenty for the time being. Cheers JA |
