MAX14850ASE+T

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Digital Isolators and the MAX14850ASE+T

Digital isolators are devices that are used in electrical circuits to allow signals to pass between circuits while isolating them from each other. Unlike analog isolators which use analog methods to isolate circuits, digital isolators use digital techniques such as data encoding and decoding, signal processing, and a transformer or galvanic isolation. Digital isolators offer higher performance, lower power consumption, and greater immunity to noise and voltage transients than analog isolators.

The MAX14850ASE+T is a family of digital isolator devices designed by Maxim Integrated. It includes the MAX14850ASE, MAX14851ASE, MAX14852ASE, and MAX14853ASE. The MAX14850ASE+T is ideal for a variety of applications including industrial automation, motor control, motor speed control, medical equipment, and other applications that require single or multiple channel digital signal isolation.

The MAX14850ASE+T Application Field

The MAX14850ASE+T is designed for use in applications that require the isolation of digital signals between two circuits. It provides up to 3kV of isolation between its signal channels and can support data transmission speeds of up to 100Mbps. It is also designed to withstand high-voltage transients, making it ideal for use in industrial environments. Additionally, the device has built-in noise immunity and an ESD protection of up to 8kV.

The MAX14850ASE+T is designed to provide up to 4 isolated channels for bidirectional data communication and control between two circuits. These channels have an operating temperature range of -40°C to +85°C and a data rate of up to 100Mbps. The device also features an adjustable data rate from 1Mbps to faster than 500Mbps and a power supply ranging from 3.3V to 40V.

The MAX14850ASE+T Working Principle

The MAX14850ASE+T is based on a transformer or galvanic isolation technique to isolate the data and control signals between two independent power systems. The device uses an optocoupler for each channel, consisting of a light emitting diode(LED) and a phototransistor coupled together to form an electrical barrier between the two circuits. The device encodes the data and control signals into a pulse-width modulated (PWM) format using the LED, and decodes the data and control signals using the phototransistor.

The encoded data and control signals are then transmitted across the isolation boundary by the galvanic isolation, and are received by the phototransistor. The phototransistor then decodes the data and control signals back into their original form. This isolated data transfer technique eliminates interference from noise and voltage transients in the signal path.

The MAX14850ASE+T is designed for bi-directional data and control signal isolation. It can also be used to provide multiple point-to-point isolation paths between different circuits, allowing each circuit to have its own digital communication path. The device is available in standard 8 and 14-pin SOIC packages for easy integration into a variety of systems.

Conclusion

The MAX14850ASE+T is a versatile and powerful digital isolator device that is ideal for applications requiring digital signal isolation. It has built-in noise immunity, an ESD protection of up to 8kV, and up to 4 isolated channels for bidirectional data communication and control between two circuits. With its adjustable data rate and wide temperature range, the MAX14850ASE+T is a reliable solution for digital signal isolation.

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