Hello, I'm making an arbitrary pulse-shape generator and I want to use this DAC: htt*p://ww*w.analog.c*om/static/imported-files/Data_Sheets/AD768.pdf (remove the asterices) Are there any tutorials on the internet for how to interface with external chips such as DACs? How does the clocking work? It says in the spec that it is 1MHz, but the arduino is 16MHz. What happens there?
Cheers,
Rob
Or would this one be better? http://docs-europe.origin.electrocomponents.com/webdocs/0701/0900766b80701977.pdf
It says in the spec that it is 1MHz, but the arduino is 16MHz. What happens there?
1 MHz is the maximum sample output rate, you will be lucky to get samples at that speed from an arduino, especially at a sustained rate.
This is a parallel input D/A so you will need some sort of port expander in front of it, that’s going to slow you down.
What output sample rate do you need?
Your best bet is to read the data sheet for interfacing advice.
That second one being serial is a lot better to interface to. Again just read the data sheet.
Cheers for the help. Is serial SPI what I want? The sampling rate needs to be around 100KHz or higher if possible. It needs to be 16-bit.
How about this one:
http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProduct&R=5386438
Would I hook it up similar to this guy:
http://mrbook.org/blog/2008/11/22/controlling-a-gakken-sx-150-synth-with-arduino/
Cheers!
Did you read this bit in the data sheet?
they are designed to work of a single 5V supply with a +/10 reference voltage
That means you need to feed it with two other voltages, +10v and -10V.
It is a surface mount part, are you OK with that?
That other link looks like the way to connect an SPI device.
However forget using solder-less breadboard if you hope to get close to 16 bits resolution.