Digitize A $1000 Sensor With A $1 Analog-to-digital Converterdesign Note 456

摘要

With manufacturers claiming up to 32 bits of resolution on their precision ADCs, and a confusing array of choices between 8 and 32 bits, often with highly obfuscated data sheets, where does a "medium speed, medium resolution" part like the LTC2450 fit in? It fits pretty much anywhere where you would use a 4-1/2 digit (40,000 count) digital voltmeter to test your circuit. At the other end of the performance spectrum, the LTC2450 is more economical than many 12-bit ADCs. The next time you are searching for an ADC, consider the LTC2450. It may be just what you need for performance, while occupying a tiny amount of board space that matches its tiny price ($1.15 each in 1000-piece quantities).