Project Analog - February 2008 - (Page 3) Viewpoint Still Keeping Our prOmiSe By Murray Slovick mslovick@hearst.com Contents suggests that returning to serial data interfaces would allows for the seemingly incompatible goals of (1) increased converter speed and resolution and (2) a reduced-size form factor. Harris also tackles directly the challenges this presents, such as the question of speed limitations for LVDS drivers. If you’re designing for portable handheld MP3 player you’ll want to read Larry Gaddy’s (AKM Semiconductor) “Selecting an Audio Codec for Portable Apps” From system cost to power requirements, mic inputs to headphone drivers, Gaddy reviews all key elements that can affect audio quality and thus pay a role in selecting an audio codec IC. As new ADC topologies emerge and converter resolution and accuracy increases, PCB layout requirements are issues you cannot ignore during selection and design. “Layout Techniques for High Accuracy and Resolution ADCs,” found on page 11 of this issue, will give you a good understanding of layout practices for both SAR and Delta Sigma converters. Enjoy! Murray Slovick mslovick@hearst.com If you’re like most of us you come to the new year with a list of resolutions and a gritty determination to make them stick this time around. But by February, March latest, more often than not you’re back to the usual routine. Keeping New Year’s resolutions is difficult. Viewpoint Digital potentiometer application circuits Smart ADC architecture Layout techniques for high accuracy and resolution ADCs Analog news Can we not resist the world of zeroes and ones? I was thinking about this recently when reviewing the articles appearing in this edition of Project Analog, which focus primarily on the world of converters—both ADCs and DACs. In this space I have emphasized the fact that even though we live in a world where advances in digital technology dominate the newspaper headlines, analog technology plays a critical role in popular consumer products. So what gives with the analog-to-digital bit? (pun intended). Is it a case of creeping binary? Can we not resist the world of zeroes and ones? Not at all. Simply put, we’re not Luddites and we recognize the valid need to perform as much signal processing as possible in the digital domain. Here are some highlights of this issue: In “Smart ADC Architecture” National Semiconductor’s Ted Harris examines recent design trends, including improved signal to noise ratio and dynamic range. He Microchip analog page Mixed-signal overview Sample center microchipDIRECT Reference designs/ app notes Technical training 3 · ProjeCT ANALog · feb 08 http://www.microchip.com http://www.microchip.com/analog http://www.microchip.com/analog http://www.microchip.com/mixedsignal http://sample.microchip.com/Default.aspx?testCookies=true http://www.microchipdirect.com/catalogselection.aspx?returnURL=default.aspx http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1469&filter1=function&redirects=appnotes http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1469&filter1=function&redirects=appnotes http://www.microchip.com/stellent/idcplg?IdcService=SS_GET_PAGE&nodeId=1423
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