Hi:
Im trying to use DAC LTC7545A with arduino but for some reason is not working as good as DAC 0808. I think it might be related to the WR and CS pins, what are those pins for???
datasheet
http://cds.linear.com/docs/en/datasheet/7545afs.pdf
CS is Chip Select. It tells the chip it's being addressed... If you have RAM, ROM, a DAC, etc. on the data bus, only one chip should be selected at a time. If there's nothing else sharing the data lines, you may be able to tie it permanently low.
The WR (write line) means you are writing data into the chip. (Or, you can think of it as telling the chip to "read"... I'm writing, you need to read... I'm talking, you need to listen...) It basically means, "OK.. the correct data is on the data bus now and is ready for you to use." When the data on the data bus is changing, it will be invalid/unknown for a short period of time and it's important to make sure the data is stable before activating the write-line. For example, let's say you are counting-up from 011 (3) to 100 (4). There may be a short period of time when you have 111 (7).
Thanks!
So in order to write, do I need to send a high pulse (5V)? or how is this achieved?