HCPL-9031-500

Common Mode Transient Immunity (Min):	15kV/µs
Supplier Device Package:	8-SO
Package / Case:	8-SMD, Gull Wing
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 125°C
Voltage - Supply:	3 V ~ 5.5 V
Rise / Fall Time (Typ):	1ns, 1ns
Pulse Width Distortion (Max):	3ns
Propagation Delay tpLH / tpHL (Max):	15ns, 15ns
Data Rate:	110MBd
Series:	--
Voltage - Isolation:	2500Vrms
Channel Type:	Unidirectional
Inputs - Side 1/Side 2:	1/1
Number of Channels:	2
Isolated Power:	No
Type:	General Purpose
Technology:	GMR (Giant Magnetoresistive)
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

Digital isolators provide an isolated connection between two circuit lines. They provide isolation for signal transmission and isolate power and ground lines from each other to prevent circuit malfunction due to ground loops. The HCPL-9031-500 is a particular digital isolator manufactured by Avago Technologies. This digital isolator is an ideal solution for protecting and isolating circuits from unwanted signals or noise.

Application Field

The HCPL-9031-500 is a 4-channel digital isolator, meaning it provides four isolated pathways for circuit transmission. This makes it useful in applications where multiple signals need to be isolated, including industrial control systems, automotive, and medical devices. It provides isolation of up to 2500Vrms from input to output, making it suitable for harsh industrial environments. It is also RoHS compliant, meaning it does not contain hazardous materials such as lead or cadmium. The HCPL-9031-500 is designed for applications with higher common mode transient immunity requirements. It has a common mode transient immunity of up to 25kV/μs, making it an excellent choice for applications with higher electrostatic discharge or other electromagnetic interference requirements.

Working Principle

The HCPL-9031-500 is a digital isolator based on a capacitive coupling scheme. It works by allowing electrical signals to pass through a capacitive medium with no direct connection between input and output. This capacitive medium consists of a series of metal plates and a dielectric between them. The capacitive medium effectively isolates the two signals, forming a barrier between them. The working principle of the HCPL-9031-500 is based on the capacitance between its two terminals. This capacitance is directly proportional to the dielectric layer thickness. The thickness of the dielectric layer in the HCPL-9031-500 is optimized for high impedance isolation and maximum charge transfer. The device also employs a number of signal conditioning techniques such as noise suppression and signal conditioning, increasing performance and reducing power consumption.

Conclusion

The HCPL-9031-500 is an ideal choice for applications requiring isolation, noise suppression, and high common mode transient immunity. This digital isolator is RoHS compliant and is optimized to provide reliable performance in harsh industrial environments. Its working principle is based on a capacitive coupling scheme and provides up to 2500Vrms isolation from input to output.

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