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But can the bandwidth also reach a maximum of 500MHZ?There is also 0.5% accuracy
But few people use it to make power measurement devices,I do not know why
Quote from: daisizhou on July 19, 2024, 12:10:54 amBut few people use it to make power measurement devices,I do not know whyThe high price and it is single source only from AD -- so that's main reasons.Same with e the LT-chips for RMS measurement (10hz..50/100Mhz possible) -obsolete since decade.(btw. if you didn't aware: LT was sold to AD).
If frequency requirements are not very high , you can also consider AD835 (250MHz), which is a touch cheaper, and has already voltage outputs, plus with the added "+Z" input it can do a few more tricks too.
I've bought once a batch of AD835 from Aliexpress, in 2015. It was $1.48/pcs in batches of 10pcs. and free shipping.At first I was afraid it would be fake chips, though I've DIY a breakout board for one of those AD835, and measure it at low frequency, on a breadboard. The chip was indeed a working analog multiplier. To this day, still didn't test them at high frequency, AD835 should work up to 250MHz. Source: https://hackaday.io/project/7574-the-devil-is-in-the-details/log/26074-diy-breadboard-friendly-soic-breakout-boardsFrom traceable vendors the cost was many times higher, but I don't recall exactly the official price.
That's about $0.48/pcs for a 500MHz AD834, right? The Analog Devices webpages for AD835 and AD834 list them as starting from $16.93/pcs respectively $30.56/pcs for 1ku.Don't know what's the catch, but there must be a reason why the Chinese AD834 is more than 60 times cheaper.
Quote from: dzseki on July 19, 2024, 06:58:55 amIf frequency requirements are not very high , you can also consider AD835 (250MHz), which is a touch cheaper, and has already voltage outputs, plus with the added "+Z" input it can do a few more tricks too.Are AD834 and AD835 interchangeable?I rarely see any enthusiasts using them to make RMS measurement circuits or other DIY works on the Internet.