A Low Voltage High Speed Segmented Current Steering DAC for Neural Stimulation Application

Abstract

A multi-phasic neural stimulator using current steering Digital to Analog Converter with low resolution is in great demand to ameliorate symptoms of Parkinson's disease and disorders of consciousness. This article presents 5-bit segmented DAC designed for such applications. In order to simulate the design, cadence virtuoso tool with 180 nm MOS technology is used. The results obtained after simulation indicate that the proposed DAC offers +0.34 LSB INL and +0.36 LSB value for DNL. For the input of 200 MSPS, the power dissipation is about 22 mW when working with 1.8 V of supply voltage.