A Low-Power Wide Supply Range Delay-Line Based IC for Amperometric Measurement

A novel Delay Line based bidirectional readout IC is proposed for Potentiostatic measurement which allows time-domain analysis of sensor current and offers highly linear (R2=0.9998), low noise and low power implementation. The architecture is implemented in 0.18μm process and can operate for two distinct input range (IR) ±10nA/±10μA, while the Delay Line consumes 3.6μW/150.7μW power, respectively. Due to its digital intensive nature, the architecture supports a wide variation in supply voltage 0.6V-1.8V, while ensuring little deviation of sensitivity.