A 12-bit Multi-Channel Non-Calibrating Dual-Mode Successive Approximation ADC for Power Management Bus (PMBus) Devices

In this paper, 12-bit multi-channel non-calibrating dual-mode successive approximation ADC for PMBus devices is newly proposed. The proposed dual-mode data converter is attractive due to that all the requirements of the PMBus devices, which are high resolution, low-cost, dual-mode, multi-channel, and low power consumption for portable products, are successfully matched. Based upon the device parameters of 0.25 mum 1P5M CMOS technology with 3.3/2.5 V power supply, all the functions and performance of the proposed dual-mode data converter for PMBus are successfully tested and proven through SPICE simulations and verified in the measurements. The area of this chip is 1.64 times 1.56 mm² and the measured power consumption is 1.683 mW. The proposed dual-mode data converter is suitable for power monitoring systems, such as PMBus devices.