一种可集成于电池组检测芯片的Sigma-Delta A/D转换器  

Design of a Sigma-Delta A/D Converter for Battery Measurement Chip

作　　者：袁云[1] 李福杰[1] 赵野[1] 黑勇[1] 

机构地区：[1]中国科学院微电子研究所,北京100029

出　　处：《微电子学与计算机》2014年第11期143-147,共5页Microelectronics & Computer

基　　金：国家重大科技专项"新型节能驱动产品设计"(102010ZX02201-003-001);广东省中国科学院全面战略合作项目资金资助(2011A090100010)

摘　　要：为提高电池组电压检测芯片的检测精度,采用BCD高低压兼容工艺,设计、实现了一种可集成于高压电池组检测芯片的Sigma-Delta ADC.该ADC的调制器为单环三阶反馈结构和过采样率256,数字滤波器的通带纹波小于0.001dB,阻带衰减能够达到-100dB.在5V的电源电压下,ADC的整体功耗为4.67mW,版图尺寸为2.56mm×0.51mm.在1kHz的信号带宽内,该ADC能达到88dB的信噪失真比、99.2dB的动态范围和0.01%的测量精度.In order to develop the accuracy of a battery measurement chip , based on BCD180 HLV compatible process ,a Sigma-Delta A/D Converter for battery measurement chip was implemented .The modulator of the ADC adopted single loop three orders feedback structure and OSR of 256 ,the digital filter featured ripples within ± 0 .001 dB in pass band and-100 dB attenuation in stop band .The ADC consumed a power of 4 .67 mW (0 .935 mA) ,and the layout area was 2 .56 mm × 0 .51 mm at 5 V supply .It had an SNDR of 87 dB ,an SFDR of 99 .2 dB and the accuracy 0 .01% in 1 kHz bandwidth .

关 键 词：SIGMA-DELTA调制器 电池组检测芯片 开关电容积分器 数字滤波器 

分 类 号：TN792[电子电信—电路与系统]