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基于GSMC 0.18μm CMOS工艺,采用曲率补偿带隙参考电压源和中心对称Q2随机游动对策拓扑方式的NMOS电流源阵列版图布局,实现了一种10 bit 100 MS/s分段温度计译码CMOS电流舵D/A转换器。当电源电压为1.8 V时,D/A转换器的功耗为10 mW,微分非线性误差和积分非线性误差分别为1 LSB和0.5 LSB。在取样速率为100 MS/s,输出频率为5 MHz条件下,SFDR为70 dB,10 bit D/A转换器的有效版图面积为0.2 mm2,符合SOC的嵌入式设计要求。
Based on the GSMC 0.18μm CMOS process, a 10-bit 100 MS / s segmented thermocouple-coded CMOS current is achieved by using a topology circuit of curvature compensation bandgap reference voltage and center-symmetric Q2 random walk strategy topology. Rudder D / A converter. The D / A converter consumes 10 mW at a supply voltage of 1.8 V, with a differential non-linearity error and an integrated non-linearity error of 1 LSB and 0.5 LSB, respectively. The SFDR is 70 dB at a sampling rate of 100 MS / s and an output frequency of 5 MHz. The 10-bit D / A converter has an active layout area of 0.2 mm2 and meets the SOC’s embedded design requirements.