Convert Temperature to Current at High Linearity with LT3092 Current Source - Design Note 484

摘要

The LT3092 requires only two external resistors to produce a 2-terminal current source that references to input or ground, or sits in series with signal lines.rnA 2-terminal current source enables a number of applications, especially those involving long wire runs, as Kirchoff's laws dictate the conservation of current over long wire distances-distances where a voltage signal would be corrupted. The example presented here uses the LT3092 and a linear thermistor kit to convert temperature to current, creating a 2-terminal current output thermometer. Placing this in series with long distances of wire maintains accuracy despite the distance of wire used.