ISO7840DW

Common Mode Transient Immunity (Min):	100kV/µs
Supplier Device Package:	16-SOIC
Package / Case:	16-SOIC (0.295", 7.50mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 125°C
Voltage - Supply:	2.25 V ~ 5.5 V
Rise / Fall Time (Typ):	1.7ns, 1.9ns
Pulse Width Distortion (Max):	4.1ns
Propagation Delay tpLH / tpHL (Max):	16ns, 16ns
Data Rate:	100Mbps
Series:	--
Voltage - Isolation:	5700Vrms
Channel Type:	Unidirectional
Inputs - Side 1/Side 2:	4/0
Number of Channels:	4
Isolated Power:	No
Type:	General Purpose
Technology:	Capacitive Coupling
Part Status:	Active
Packaging:	Tube

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Introduction

Digital Isolators are a type of electronic components used to electrically isolate two circuits, while permitting digital signal exchange between them to prevent damage due to galvanic coupling, electric arcs, and sparks. One of the most common and popular digital isolators on the market is the ISO7840DW. This article will discuss the application field and working principle of the ISO7840DW.

Application Field

The ISO7840DW can be used in a variety of applications. It is suitable for use in communication systems and debugging tools, digital signal relays, and transient protection circuits. It is also ideal for use in medical devices and high-end consumer electronics where AC line protection is desirable. Additionally, it is useful for automotive applications such as engine control and power management systems. The ISO7840DW also provides protection against hazardous voltages in industrial equipment and equipment with high-power consumption, such as plant equipment and lighting systems.

Working Principle

The ISO7840DW employs silicon dioxide isolation technology, which provides a barrier between two circuits while still allowing data to be exchanged between them. The isolator consists of two parallel-connected MOSFETs. When an input signal is applied to the isolator, one of the MOSFETs is off and the other is on. This creates a low on-resistance path that allows the input signal to pass through. When the output signal is generated, the MOSFETs switch the low on-resistance path to a high off-resistance path, which isolates the two circuits. The ISO7840DW also features a wide operating temperature range (– 40°C to + 105°C), making it suitable for high-temperature applications. It also provides a thermal shutdown feature that powers down the isolator in the event of an over-temperature situation.

Conclusion

The ISO7840DW is a versatile isolator suitable for a variety of applications. It provides effective protection against hazardous voltages, allows digital signal exchange between two circuits, and features a wide operating temperature range and a thermal shutdown feature. With its excellent features and performance, the ISO7840DW is an ideal choice for a wide range of applications.

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