Hello,
I am looking for an ADC recommendation for a project in which it is necessary to measure the various planar forces applied to a stationary object with reference to its mounting point using strain gauges.
The system requirements are as follows;
- 3 differential channel inputs from half-wheatstone bridges
- Battery powered, needs low-power mode since it won't be active all the time.
- Large weight offset from object (up to 80kg)
- Doesn't need to be tremendously fast (100 KSps would be fine)
- Good noise suppression
- If possible, few external components
- Serial interface
- Ideally <$5 @1k
- Supply voltage is flexible, but ideally 3.3-5V
I've been having a little trouble finding a part with the product search, since some ADCs list their input numbers as single ended and some as differential. I thought the ADS1220 was a good candidate until I realised it only has 4 inputs if you use them single-endedly. Before this realisation I read through the reference design "1g Resolution over 15kg Range Sub-100nVpp Noise Front-End Reference Design", which was still useful.
Could anyone make some suggestions for an appropriate part please?
Thanks,
Craig
