Reference

Challenges: May be required for the microcontroller's internal ADC to increase accuracy.

DATA SHEETS
Display	Title/Parts	Key Advantages
QV  PDF	50ppm/°C Precision Micropower Shunt Voltage References with Multiple Reverse Breakdown Voltages LM4050, LM4050A, LM4050B, LM4050C, LM4051, LM4051A, LM4051B, LM4051C	50ppm/°C Precision Micropower Shunt Voltage References with Multiple Reverse Breakdown Voltages
QV  PDF	Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages LM4040	Improved Precision Micropower Shunt Voltage Reference with Multiple Reverse Breakdown Voltages