An on-chip programmable multichannel power supply for a lab-on-chip platform

Abstract

This paper presents a reprogrammable low-voltage power-supply integrated circuit for low resistive load down to 180 Ω. The achieved chip is dedicated for biomedical lab-on-chip (LoC) platforms. The proposed system includes two positive and two negative fully independent output voltage channels. Each positive and negative channel provides a reprogrammable DC output which varies from 14.23 mV to 1.42 V and -1.54 V to 0 V, respectively. Each channel is controlled through a reprogrammable reference voltage circuit with an 8-bit digital to analog converter (DAC). A wireless real-time control of output signals amplitude is performed with LabVIEW and FPGA-based interface. The proposed architecture is implemented with 0.18 μm 3.3 V 1-poly 6-metal CMOS technology. The chip area is 1.5 mm2. Post-layout simulations show that the minimum voltage step is 12.21 mV. The accuracy of output voltage is 5 mV and the measured power consumption is 35 mW.