Author Topic: Fortune Semiconductor FS9721-LP1 Vs. FS9721-LP3  (Read 852 times)

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Offline shakalnokturnTopic starter

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Fortune Semiconductor FS9721-LP1 Vs. FS9721-LP3
« on: July 20, 2023, 12:11:32 am »
I figured this was the most appropriate section for my question, sorry if it wasn't.

I have an upcoming Hantek Scopemeter repair that will possibly involve replacing the DMM ASIC.
What are the differences between -LP1 and -LP3 suffixes?
Anyone had luck with the dirt cheap GC7721 equivalent such as this one https://www.aliexpress.com/item/1005002054301623.html ?
 

Offline shakalnokturnTopic starter

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Re: Fortune Semiconductor FS9721-LP1 Vs. FS9721-LP3
« Reply #1 on: October 25, 2023, 09:11:17 pm »
As a follow-up to my own question:
The GC7721-P1 ordered did exhibit some signs of life but would not communicate with the rest of the meter as intended. I didn't go to in depth analysis of why it was not communicating. The GC7721-P3 worked like the original chip but required some readjustment.
 

Online coromonadalix

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Re: Fortune Semiconductor FS9721-LP1 Vs. FS9721-LP3
« Reply #2 on: October 26, 2023, 03:57:26 am »
for the 1st one  you may have got a defective  ???

unless there is an huge difference between these two ??   maybe ask  Fortune Semiconductor.... ???
 


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