Quantum mechanics

Parasitic capacitance

Voltage

Engineering

Capacitance

Successive approximation ADC

Digital-to-analog converter

Computer science

Linearity

Capacitor

Capacitive sensing

Physics

Mathematics

Electronic engineering

Electrode

Topology (electrical circuits)

Binary number

Arithmetic

Electrical engineering

Conventional C-2C capacitive array digital-to analog converter(C-2C DAC) have many strong points such as its small area, low power consumption and high speed operation. However, if the DAC requires linearity that can be used for successive approximation ADC (SAR-ADC) with medium resolution or higher, it is necessary to consider the parasitic capacitance of the floating node. Moreover, the effects of the capacitor mismatch should be considered. In order to overcome these difficulties, this paper proposes a novel C-2C ladder based non-binary DAC(C- 2α C DAC). Each bit of C- 2α C DAC has the same radix-r <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">a</sub> (1<; r <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">a</sub> <; 2) and the DAC is composed of only single size of unit capacitors.

A Novel C-$2\alpha \boldsymbol{C}$ Ladder Based Non-binary DAC for SAR-ADC Using Unit Capacitors