The ADM2483 is an isolated RS485 transceiver chip from Analog Devices (Analogdevice, Inc) based on its patented iCoupler magnetic isolation technology. It integrates a three-channel digital isolator, a differential driver with a three-state output, and an RS485 differential receiver with a three-state input. The number of nodes can be up to 256, with a maximum transfer rate of up to 500Kbps.
iCoupler Magnetic Isolation Technology is a patented isolation technology from Analog Devices, Inc. - a chip-scale transformer isolation technology that uses high-speed CMOS technology and chip-scale transformer technology. Therefore, in terms of performance, power consumption, volume and other aspects, there are advantages that traditional optoelectronic isolation devices (optocouplers) can't match. Since magnetic isolation is designed to eliminate the photoelectric conversion link affecting efficiency in the optocoupler, its power consumption meter is 1/6--/10 of the photocoupler, and has a higher data transmission rate than the photocoupler. Timing accuracy and transient common mode rejection. It also eliminates unstable current transfer rates, nonlinear transmission, temperature and lifetime in optocoupler.
The ADM2483 uses a slew-rate driver with a short-circuit current limit, which reduces the bit error caused by improper terminations. An integrated thermal shutdown circuit places the driver output in a high-impedance state to prevent excessive power loss. The chip package is available in an easy-to-use SOW-16 package with an industrial temperature range that enables RS-485 communication without any discrete components.
Performance characteristics with isolated RS-485 transceiver, isolation voltage: 2500Vrms, maximum transmission rate 500Kbps, bus maximum number of nodes: 256, thermal shutdown protection mode, with true fail-safe function, transient high common-mode rejection: 25KV/US, low power consumption: maximum 2 5mA working current, C for voltage; VDD1: 2.7~5.5V, VDD24.75~5 25V. Operating temperature range: -40C-+85C, small package: SOIC-16 wide body
Application range: RS-485 communication occasions require level converter 485 Communication C industry control LAN
In order to realize long-distance communication between the bottom multi-acquisition module and the host computer, the RS 485 bus is used for data transmission on the bottom layer. Since the serial port of the PC terminal is the RS 232 interface, it is necessary to connect the dedicated RS 232/RS 485 conversion module to convert the RS 232 signal into the RS 485 signal on the PC end. The acquisition unit uses the communication module chip as the ADM2483 with magnetic isolation, and adopts the industry standard protocol - MODBUS RTU communication protocol. The picture shows the RS 485 communication interface hardware circuit.
In order to realize long-distance communication between the bottom multi-acquisition module and the host computer, the RS 485 bus is used for data transmission on the bottom layer. Since the serial port of the PC terminal is the RS 232 interface, it is necessary to connect the dedicated RS 232/RS 485 conversion module to convert the RS 232 signal into the RS 485 signal on the PC end. The acquisition unit uses the communication module chip as the ADM2483 with magnetic isolation, and adopts the industry standard protocol - MODBUS RTU communication protocol. The picture shows the RS 485 communication interface hardware circuit.
In order to realize long-distance communication between the bottom multi-acquisition module and the host computer, the RS 485 bus is used for data transmission on the bottom layer. Since the serial port of the PC terminal is the RS 232 interface, it is necessary to connect the dedicated RS 232/RS 485 conversion module to convert the RS 232 signal into the RS 485 signal on the PC end. The acquisition unit uses the communication module chip as the ADM2483 with magnetic isolation, and adopts the industry standard protocol - MODBUS RTU communication protocol. The picture shows the RS 485 communication interface hardware circuit.
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