Voltage Reference Scaling Technique Increases ADC Accuracy to Keep Costs Down

By: Franco Contadini

Abstract: In this design note a circuit uses a 10-bit ADC, voltage divider, and external reference to improve the ADC's virtual accuracy to 13 bits. The article shows a voltage scaling technique that extends 10-bit ADC range to 13 bits. The MAX159 10-bit ADC, MAX5420 voltage divider, and MAX6141 voltage reference are featured.