摘要
Abstract
A high precision current sensor for battery power supply equipment management is presented.The current sensor by the SC(switched capacitor)delta sigma ADC,10 mΩ on-chip shunt resistance and dynamic strap gap reference voltage source,the dynamic band gap reference voltage source can provide the ADC reference voltage and detection of shunt temperature.Precision is improved by using the precise shunt resistance temperature compensation,low leakage sampling scheme and the dynamic error correction technique.The current sensor is made of standard 0.13 μm CMOS technology,with an area of 1.15 mm2,and the current loss of 55 μA at 1.5 V.Measurement results show that compared with the traditional current sensor,current sensor is proposed in the current range of-5 A to +5 A and-50 ℃ to +85 ℃ temperature range,the maximum deviation for 16 μA,the maximum gain error of +0.3%,accuracy has been significantly improved.关键词
电流传感器/动态带隙基准电压/分流电阻/高精度/温度补偿Key words
current sensor/dynamic band gap reference voltage/shunt resistance/high precision/temperature compensation分类
信息技术与安全科学
