Passive displacement resistance signal (ISO R-O), analog voltage signal (ISO U-O), analog current signal isolator (ISO A-O) transmitter is the industry's smallest, low-cost passive loop fed analog transmitterSignal isolation transmitterIC. This IC has efficient signal coupling transformer circuit feeding technology, which provides power operation through the post stage current output circuit feeding method without the need for external working power supply. The IC is matched with sensors, instruments, PLC/DCS in the design scheme, and can adapt to analog voltage, current or displacement resistance signal input of various specifications. After amplifying, conditioning, isolating and transmitting the active signal of the two-wire/three wire/four wire universal sensor in the industrial field, the IC outputs the two-wire analog current signal of 4~20mA/2-10mA/4-12mA/4-8mA/12-20mA and other parameters. The core components in the technical solution include passive displacement resistance signals (ISO R-O), analog voltage signals (ISO U-O), and current signals (ISO A-O). The transmitter is designed as a high-precision, small-sized standard SIP12 Pin flame-retardant IC package, which adopts magneto electric isolation coupling method and high-performance post feeding technology. It can achieve precise isolation and conversion of DC voltage, current, single and bidirectional signals, angular displacement, electronic ruler, potentiometer and other analog signals to two-wire loop feeding current loop signals, and is matched with various types of instrument standard analog input ports (such as PLC, DCS, FCS). The core products of the solution include PCB board installation with small volume IC packaging and DIN35 standard rail installation. The DIN rail installation can achieve signal isolation and conversion functions for industrial sites, including one in one out, one in two out, one in three out, two in two out, four in eight, and sixteen signals. Users can choose the technical solution according to their on-site needs.