一种嵌入式12位300 MHz D/A转换器

Design of 12-Bit 300 MHz Embedded D/A Converter

设计了一种用于高速频率合成器的12位300 MHz采样率嵌入式低功耗D/A转换器。该D/A转换器采用4+4+4分段式编码结构,用0.35μm 2P4M CMOS工艺实现,整个模块面积仅为1.3 mm×1.2 mm。测试结果表明,在300 MHz采样率下,输出信号频率为30 MHz时,无杂散动态范围为64.22 dB,电路功耗仅为136 mW。

A low power 12-bit 300 MHz embedded digital-to-analog converter（DAC） for high speed frequency synthesizer was presented,for which 4＋4＋4 segmented current-steering architecture was employed.The DAC circuit was fabricated in 0.35 μm 2P4M mixed signal CMOS technology,and the block occupies a chip area of 1.3 mm×1.2 mm.Test results showed that,for 30 MHz output signal,the circuit had an SFDR of 64.22 dB at 300 MHz sampling rate with a power consumption of only 136 mW.