MAXREFDES12#: Isolated Octal Input Translator

Summary

In industrial control, industrial automation, motor control, and process automation applications, binary/digital sensors and switches are frequently required. Systems often need many optocouplers for isolating each sensor channel.

The Corona (MAXREFDES12#) subsystem reference design provides the front-end interface circuit of a programmable logic controller (PLC) digital input module. The serialization feature allows a large reduction in the number of optocouplers used for isolation. The reference design accepts high-voltage inputs (36V, max) and features isolated power and data—all integrated into a small form factor.

The Corona design integrates an octal, digital input translator/serializer (MAX31911), a data isolation device (MAX14850), and an H-bridge transformer driver for isolated power supply (MAX13256). The Corona digital input circuit solution is mainly targeted for digital input modules for PLCs, industrial automation, process automation, and motor control applications.

Specifications

Manufacturer	Analog Devices Inc./Maxim Integrated
Category	Wired Communication
Sub-Category	Interface Solutions
Eval Board Part Number	MAXREFDES12#-ND
Eval Board Supplier	Analog Devices Inc./Maxim Integrated
Eval Board	Normally In Stock
Purpose	Input Translator/Serializer
Component Count + Extras	30 + 25
Features	Current Limit (Adj. or Fixed) Fault Indication I²C Interface Isolated Power and Data Over Current Protection PMBus Interface SMBus Interface SPI Interface Synchronizable Thermal Protection Under Voltage Protection, Brown-Out
Data Rate (Max)	2 Mbps (bidirectional) 50 Mbps (unidirectional)
Design Author	Maxim Integrated Products
Main I.C. Base Part	MAX13256 MAX14850 MAX31911
Date Created By Author	2013-05
Date Added To Library	2014-01