Hi, I started using an hx711 as they're common for my projects, but now i'm looking at something faster and better. I also have some noise issues no amount of shielding is solving! my power supply had 3mv~ noise on the internal regulator.
I assume a delta-sigma is best for my application? I Don't want to go past 8$! (I get my parts from LCSC)
I want a sample rate of at least 1KSPS and a resolution of 24 bit (I'm just saying that off the top of my head as my hx711 is like that)
I'm basically measuring a load cell that's just two resistors on a PCB (They work surprsingly well! who knew simple 2512 resistors can be used as strain gauges!)
the hx711 is great so far, but it's so noisy and very slow (80hz)
I came down to two options, the ads1220 and ads1255/1256. but reading the datasheet, I realized i'm not experianced enough or knowledgable to choose one properly. any ideas/options?! should I grab one with an integrated PGA or just amplify the wheatstone bridge myself with an OP-AMP?
this is the board i'm using atm,
https://universal-solder.ca/product/hx711-scale-amplifier-module-shielded/ . I noticed no difference with or without the shield, and even grabbing some copper sleeving for the cables and grounding it had no effect (Simply conneceted it to my hx711's ground input. I also need to compensate for temprature, but for now I figured ICs can't help with that, and i just have to put a sensor next to my gauge, or maybe see how hard and expensive it is to build an eddie current gauge? (tho that might also be subject to temp drift)
Thanks