ISO1540DR Isolators

Common Mode Transient Immunity (Min):	25kV/µs
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Voltage - Supply:	3 V ~ 5.5 V
Rise / Fall Time (Typ):	--
Pulse Width Distortion (Max):	80ns, 21ns
Propagation Delay tpLH / tpHL (Max):	--
Data Rate:	1Mbps
Series:	--
Voltage - Isolation:	2500Vrms
Channel Type:	Bidirectional
Inputs - Side 1/Side 2:	2/2
Number of Channels:	2
Isolated Power:	No
Type:	I²C
Technology:	Capacitive Coupling
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Digital IsolatorsDigital isolators are a type of electrical circuit component that is designed to protect sensitive circuits from potentially damaging electrical conditions. They isolate two or more circuits electrically, while allowing the signals to pass between them without interruption. Digital isolators perform a similar function to the traditional galvanic isolation used in analog circuits. However, due to their digital nature, digital isolators are more efficient, faster, and often able to provide higher levels of noise immunity than galvanic isolation circuits.One type of digital isolator is the ISO1540DR. This device is designed for use in applications requiring high-speed signal and power isolation, as well as providing protection against electrical noise and other interference. The ISO1540DR is based on a magnetic-based isolation technology, and it is constructed from an array of integrated isolator chips, which are connected in a ring topology. Each chip is connected to one or more signal paths, with electrical isolation between each chip.The main application fields for the ISO1540DR are typically communications systems, such as those used in industrial Ethernet applications, or computer-to-machine (C2M) applications. As these types of systems require fast data transfer, as well as protection from electrical noise, the ISO1540DR digital isolator is an ideal solution.In terms of working principle, the ISO1540DR digital isolator works by isolating the input and output signals using a high-speed magnetic transformer. The transformer is connected to the input and output pins of the device, and acts as an intermediary, with the output noise being converted back into a voltage, while the output signal passes through the transformer unscathed. This type of transformer is able to act as a barrier between the input and output signals, preventing any interference from reaching the output.In order to ensure that the ISO1540DR digital isolator is working correctly, it is important to keep the transformer at the correct operating voltage. This is why the device uses a high-speed digital-to-analog converter (DAC) and a low-power amplifier (LPMA) to maintain the correct transformer operating voltage. The DAC is used to convert the digital signal from the signal path into a voltage that is suitable for the transformer, while the LPMA is used to ensure that the transformer is working at the correct voltage.The ISO1540DR digital isolator is an excellent choice for applications involving communication systems and C2M applications, as it provides superior levels of electrical isolation, while also providing fast and reliable performance. The device is also relatively easy to set up and configure, and the DAC and LPMA provide the necessary voltage control to ensure that the transformer is operating correctly.

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