Ваш город: Москва
+7 (495) 221-78-04
+7 (812) 327-327-1
4 mA to 20 mA Process Control Loop Using the AD5662 DAC (cn0009)
In many process control applications, 2-wire current transmitters are often used to transmit analog signals through noisy environments. These current transmitters use a zero-scale signal current of 4 mA and a full-scale signal current of 20 mA–hence the designation "4 mA to 20 mA converter." The circuit described in this document provides a low power current transmitter with 16-bit resolution and monotonicity, which is powered directly from the 4 mA to 20 mA control loop power supply and consumes less than 4 mA. Transmitters requiring more than 4 mA cannot be powered directly from the loop power supply and, therefore, require an additional supply.
Схемы и диаграммы
Быстро получите общее представление о схемотехнике решения