The Texas Instruments ISO1540 and ISO1541 is a high-speed isolated digital output interface IC, designed to provide high-speed, isolated digital outputs for control systems. Like the ISO1540, it is designed to provide electrical isolation, making it suitable for use in industrial control systems where electrical isolation is necessary.
Both the TI ISO1540 and ISO1541 are widely used in industrial control systems, providing reliable, high-speed data transfer while maintaining electrical isolation between system components. These devices are low-power, bidirectional isolators that are compatible with the i2C interface. These devices have logic IO (input/output) buffers that are separated by capacitive isolation technology using a silicon dioxide barrier when using isolated power supplies the ISO1540 blocks the high voltages and isolates the ground and prevents the noise current from entering the local ground then blocking or halting sensitive circuitry.
ISO154X is best suited for industrial control systems that require high-speed, isolated digital outputs for control purposes. Some common applications for ISO154X include:
- Factory Automation: The ISO1541 can be used in factory automation systems to provide isolated digital outputs for control and monitoring purposes.
- Process Control: ISO154X can be used in process control systems, such as those used in the chemical and petrochemical industries, to provide isolated digital outputs for process control and monitoring.
- Building Automation: ISO1541\X can be used in building automation systems, such as heating, ventilation, and air conditioning (HVAC) systems, to provide isolated digital outputs for control and monitoring purposes.
- Power Electronics: The ISO154X can be used in power electronics applications, such as inverters and power supplies, to provide isolated digital outputs for control and monitoring purposes.
- Medical Equipment: The ISO154X can be used in medical equipment, such as patient monitoring devices, to provide isolated digital outputs for control and monitoring purposes.
In general, the TI ISO1541 is best suited for industrial control systems that require high-speed, isolated digital outputs, and where electrical isolation is required to protect sensitive equipment and prevent electrical interference from affecting system performance.
Isolated bidirectional communication:
Isolated bidirectional communication refers to a communication system that provides both transmit and receive capability while maintaining electrical isolation between the two sides of the communication system. In other words, isolated bidirectional communication enables the transfer of data in both directions, while ensuring that there is no electrical connection between the transmitting and receiving circuits.
This type of communication is typically used in industrial control systems, where electrical isolation is required to protect sensitive equipment from high-voltage transients, surges, and other electrical noise that may be present in the environment. Isolated bidirectional communication can be achieved through various technologies, such as optical isolation, capacitive isolation, or inductive isolation.
Isolated bidirectional communication is essential for ensuring the reliability and safety of industrial control systems, as it helps to prevent damage to sensitive equipment and prevents electrical interference from affecting the performance of the system.
ISO1540 and ISO1541 provide isolated digital outputs for control systems, and it uses optical isolation technology to provide electrical isolation between the input and output circuits. This makes it possible for ISO1541 to provide isolated bidirectional communication by transmitting digital signals in both directions while maintaining electrical isolation between the two sides of the communication system.
In this way, ISO1540 and ISO1541 can be used for isolated bidirectional communication in industrial control systems, where electrical isolation is required to protect sensitive equipment and prevent electrical interference from affecting system performance. By providing both transmit and receive capability while maintaining electrical isolation, ISO154X helps to ensure the reliability and safety of industrial control systems.
Both the TI ISO1540 and ISO1541 are widely used in industrial control systems, providing reliable, high-speed data transfer while maintaining electrical isolation between system components. These devices were suitable for multi-controller applications for applications where clock stretching by the target is possible, the ISO154X device should be used. For more technical details please refer to the datasheet below.
ISO154X Typical Application:
The microcontroller attach to the ISO154X controls the i2C data traffic of configuration data then converted to analog inputs/outputs. The low-power data converts to make the analog interface to sensors and actuators. ISO15X device attach to the diagram provides the isolation between the different ground potentials of the system controller, sensor, and actuator circuitry to prevent or avoid ground loop currents that may falsify the acquired data. As you can see in the diagram above it operates from a single 3.3v supply with a low-power push and pull converter, however, the SN6505 drives a center-tapped transformer with an output that is rectified and regulated to provide a 5V supply for the data converter.
Wiring Diagram / Schematics
Gerber Files
- Download PCB Milling File | 14CORE-ISO1540 / ISO154
- Download Gerber Viewer | Windows | Linux
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