The proposed SAR ADC exploits V CM-based switching method with a hybrid RC digital-to-analog converter (DAC) to reduce the size of the capacitive DAC. A three-stage preamplifier followed by a latch is employed for a comparator to avoid the metastability problem and achieve high accuracy comparison.

Abstract: This paper presents a 2b/cycle asynchronous SAR ADC with a capacitive divider based RC-DAC. The new architecture reduces the number of capacitors and resistors, leading to a smaller die area and lower hardware cost.

Jun 19, 2019 · 当我们电路需要DAC而单片机并没有DAC外设时，则可采用PWM通过RC低通滤波器来模拟实现DAC功能。 RC低通滤波器. 当采用低通滤波器模拟DAC时，PWM频率应远大于RC低通滤波电路的截止频率fc=1/2πRC（10倍以上）。 输出电压为Vout=Vcc*Duty。 在使用此电路时，应注意： 1、一般情况下，当电容C较小，电阻R较大时，输出电压损耗较小，纹波较大；当电容C较大，电阻R较小时，输出电压损耗较大，纹波较小。 所以，为了获取线性度较高的精确DA …

Reasonable layout design can decrease the R-C DAC mismatch. A 12-bit resolution is achieved in 7-5 digits distribution structure of SAR ADC which operates with 1.8 V analog power and 1.8V digital power, is realized in 0.18 μm CMOS 1P6M technology.

Jan 1, 2023 · This paper presents a synchronous 9-bit column successive approximation register (SAR) ADC for CMOS imaging sensors. The SAR ADC uses a pseudo-differential RC DAC and a split capacitor array to reduce power consumption and chip area.

Using PWM Output as a Digital-to-Analog Converter on a TMS320F280x (Rev. A) This application report presents a method for utilizing the on-chip pulse width modulated (PWM) signal generators on the TMS320F280xTM family of digital signal controllers as a digital-to-analog converter (DAC).

Jan 30, 2024 · In this paper, a 12-bit SAR ADC design with calibration using a hybrid RC digital-to-analog converter(RC DAC) structure is proposed to improve the conversion accuracy of the ADC and reduce the circuit area at the same time.

Jan 1, 2024 · This paper presents a high precision single-ended SAR ADC with a hybrid R–C DAC. The proposed SAR ADC is demonstrated through sequential modeling in MATLAB, pre-layout and post-layout simulation. Designed in 0.18 μm BCD process, the post-layout simulation results show that it achieves a peak SNDR of 93.4-dB, a peak SFDR of 98.6-dB with a 250 ...

RVB) are one of the key blocks of a successive approximation register (SAR) ADC. This paper presents the design of buffer, targeted for a 12-bit, 8 MS/s SAR A. C architecture which employs a hybrid RC DAC, and is implemented in 0.13 m CMOS. The design challenges associated with RVB, which is capable of driving a hybrid RC.

Mar 16, 2024 · In this article, I present a simple Matlab function that models the combination of a basic SD DAC and one-pole RC filter. This model allows easy evaluation of the overall performance for a given input signal and choice of sample rate, R, and C.