This precision weigh-scale reference design achieves greater than 50,000 noise-free counts of resolution. Offset and offset drift errors are nearly eliminated by ac bridge excitation. This design takes advantage of the high-resolution ADS1262 delta-sigma ADC.
>50,000 noise-free count weigh-scale solution
Operating temperature range: -40 ᵒC to +125 ᵒC
Less than 1 μV total error across temperature range
ADC Supply and Bridge Excitation Voltage: 5V
Bridge Output: 0 V to 10 mV
Firmware provides ADS1262 example code
This robust circuit reference design includes theory, complete error analysis, component selection, simulation, PCB design, example code, and measured data that correlates with the theory and simulation.