22-bit A/D Converters
Published in issue 379, July/August 2008
When accuracy matters more than speed, the MCP3550 series of analogue-to-digital converters from Microchip is worth a look. They are ideal for accurately measuring DC voltages that only change slowly over time, offering an extremely high resolution of 22 bits while only drawing a paltry 150 µA from a 5 V power supply. With the addition of a low power voltage reference such as the MAX6520 as shown in this article we have an ultra-precise analogue-to-digital converter with a total current consumption of around 0.2 mA, using only a minimum number of components.
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Click below to download a PDF copy of this article from Elektor magazine. Please note. In view of the complexity of international markets, Elektor cannot guarantee the availability of components for this project.
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