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该论文提出了一种连续时间多比特ΔΣ DAC，用于汽车和消费多通道24位音频系统。通过面积优化和低功耗设计，实现了120dB SNR和100dB THD+N，每通道功耗仅21.5mW。
Analog Devices, Wilmington, MA Automotive and consumer multi-channel 24b audio systems have demanded low-cost digital-to-analog converters (DACs) which offer wide dynamic range, high linearity, small die size, and low power consumption such that the system can be housed in a small low-cost plastic package. Several 120dB SNR audio ΔΣ DACs have been reported using either switched-capacitor or continuous-time techniques [1-3]. This paper presents a continuous time (CT) area- optimized multibit DAC which achieves 120dB SNR and 100dB THD+N at 21.5mW/channel. This performance is achieved by using a new 3-level rotational data shuffling scheme which achieves small area and low digital activity at low signal level, and by applying low-power low-noise analog techniques. Assuming a thermal resistance of 42.3°C/W (typical low-cost LQFP) and a maximum junction temperature of 150°C, a 16 channel DAC would need to have a
Abhishek Bandyopadhyay, Michael Determan, Sejun Kim, Khiem Nguyen