I am working on a measurement system and I have three primary questions:
- What is the recommended implementation method for multiple channels with this device? Since it is I2C without configurable addresses I assume that a mux is the only way to implement? Are there any recommendations or drawbacks to doing this? The reason I wish to use multiple channels of this single channel device is so that I can populate only the specific channels requested and keep my design versatile.
- Is there an application note, or recommended reference material (book, app note, etc) for calculating a performance or accuracy analysis on a load cell-amplifier system? Specifically, in reference to this response by Bob Benjamin I realized I might have missed some key parameters in my analysis.
- Based upon the suggested parameters given by Bob in that prior post, I calculate that my load cell (1mV/V, 5kg) will get about 0.85g steps because it is not using anywhere close to the maximum dynamic range of the system. This is reflected in my prototype setup and with environmental conditions I see +/- 1g reliably. Ideally I would like to see better numbers say 0.1g. Is this is as simple as increasing excitation voltage say with a 5V or 10V voltage reference to increase the available signal?
Thanks kindly.