![]() ![]() That's why DACs are a bit more expensive than they'd be if they were just a bunch of resistors and transistor switches thrown in an IC. If it can be avoided, don't try to multiply analog things that is very hard to do accurately. If that isn't fine enough (or large enough) in dynamic range, you could also consider scaling the digital values. So, really, read the DAC datasheet from front to back until you figure out how to use that. Your DAC even has a dedicated gain setting functionality. These are meant for exactly this use case, adjustable amplification.īut honestly, if you have a DAC and want to adjust the amplitude of the output, do it in the DAC. I need to make the output voltage gain adjustable how can that be done?īy using a variable gain amplifier (VGA) or programmable gain amplifier (PGA). I'd simply go and read the datasheet of the opamp recommended in fig. Either you've chosen a DAC that's totally overkill for your application, or the opamp is far far far too slow. ![]() You want to have a defined, power-matched termination to ground remember, you're not using a 125 MSPS DAC to produce DC so you have to work like someone who has high-speed analog, not just a nearly constant signal.)īut: the AD712 has maybe 3 MHz of gain-bandwidth product. If that configuration looks like figure 4 of the DAC datasheet, then yes. ![]() Can I do it with following differential op-amp configuration at the output of the DAC? ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |