About this Journal Submit a Manuscript Table of Contents
VLSI Design
Volume 2010 (2010), Article ID 169079, 7 pages
http://dx.doi.org/10.1155/2010/169079
Research Article

A Cost-Effective 10-Bit D/A Converter for Digital-Input MOEMS Micromirror Actuation

1Department of Information Engineering, University of Pisa, via G. Caruso 16, 56122 Pisa, Italy
2SensorDynamics AG, via Giuntini 19, 56023 Navacchio (Cascina), Italy

Received 3 August 2010; Revised 28 October 2010; Accepted 22 December 2010

Academic Editor: Amit Kumar Gupta

Copyright © 2010 Sergio Saponara et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The design of a 10-bit resistor-string digital-to-analog converter (DAC) for MOEMS micromirror interfacing is addressed in this paper. The proposed DAC, realized in a 0.18-μm BCD technology, features a folded resistor-string stage with a switch matrix and address decoders plus an output voltage buffer stage. The proposed DAC and buffer circuitry are key elements of an innovative scanning micromirror actuator, characterized by direct digital input, full differential driving, and linear response. With respect to the the state-of-the-art resistor-string converters in similar technologies, the proposed DAC has comparable nonlinearity (INL, DNL) performances while it has the advantage of a smaller area occupation, 0.17 mm2, including output buffer, and relatively low-power consumption, 200 μW at 500 kSPS and few μW in idle mode.