Implementation of Successive Approximate Register typed A/D Converter for a Monitored Battery Voltage Conversion
Seong-Kweon Kim, Kyung-Ryang Lee, Sung-Dae Yeo, Justin S.Y. Hong, Yong-Eun Park · The Journal of the Korea institute of electronic communication sciences · 2011
In this paper, a design and an implementation of an Analog to Digital (A/D) converter are introduced for the conversion of monitored battery cell voltage in the cell voltage monitoring(CVM) system in battery management system(BMS), which is one of the key devices of ECO hybrid cars. The A/D converter in CVM system required a middle conversion speed and a high resolution, therefore, a successive approximate register(SAR) typed A/D converter with 10 bits resolution has been designed and implemented using Magna 0.6um 40V process. The measurement result which kept LSB accuracy in the full scale range(FSR) of 5V, showed the usefulness of the SAR typed A/D converter in realizing a CVM system.