Precision Current Source : Part Two

While working with precision sources, we have to consider its accuracy over its full usable temperature range. We will discuss potential ways of minimizing temperature drift due to trimmer potentiometer (POT). The accuracy of the current output depends on the values of the resistor ratio formed by the resistors. But using a trimmer potentiometer, we can overcome the total errors…

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Precision Current Source : Part One

Most of us find ourselves in a situation where we need a precision current excitation source for one or the other sensors. The easiest way to have that is to use an ADC with a built-in current source. In these ICs, an internal voltage source generates the excitation currents. ADC measurements use the same reference voltage. So the drift in…

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