What the 5V output and ±0.06% tolerance mean for your ADC chain
The MAX6126A50+ is a 5V fixed-output series voltage reference from Analog Devices, with an initial accuracy of ±0.06% — that is 3 mV of absolute error at the reference pin, which sets the full-scale floor for a 16-bit ADC sampling a 5V input range.
Noise floor and load-driving capability
For a 16-bit system with a 5V reference, this noise contributes roughly 0.6 LSBs of peak-to-peak uncertainty at the converter input. The reference can source 10 mA of output current while drawing 725 µA from the supply rail — the load regulation stays tight as long as the input voltage stays between 5.2V and 12.6V. That 10 mA budget covers the ADC reference input, a buffer op-amp, and a small resistive divider without needing a separate reference buffer.
Package, footprint, and assembly fit
The tube packaging means it ships in a rigid anti-static tube suitable for pick-and-place feeders that accept tube input.