4mA–20mA Loop Powered Temperature Sensor
This circuit is used to allow a 4mA–20mA to power an analog temperature sensor. To provide a 4mA–20mA output over a 3.75V–28V compliance range this circuit uses an op-amp, low-dropout linear regulator, transistor and an analog temperature sensor. It is powered by the loop with the only consequence being a slight offset error because of the quiescent current of the […]
Read more