DescripTion
The LTC®6820 provides bidirectional SPI communications between two isolated devices through a single twisted pair connection. Each LTC6820 encodes logic states into signals that are transmitted across an isolation barrier to another LTC6820. The receiving LTC6820 decodes the transmission and drives the slave bus to the appropriate logicstates. The isolation barrier can be bridged by a simple pulse transformer to achieve hundreds of volts of isolation.

FEATUREs
1Mbps Isolated SPI Data Communications
Simple Galvanic Isolation Using Standard Transformers
Bidirectional Interface Over a Single Twisted Pair
Supports Cable Lengths Up to 100 Meters
Very Low EMI Susceptibility and Emissions
Configurable for High Noise Immunity or Low Power
Engineered for ISO26262 Compliant Systems
Requires No Software Changes in Most SPI Systems
Ultralow, 2µA Idle Current
Automatic Wake-Up Detection
Operating Temperature Range: –40°C to 125°C
2.7V to 5.5V Power Supply
Interfaces to All Logic from 1.7V to 5.5V
Available in 16-Lead QFN and MSOP Packages

APPLICATIONs
Industrial Networking
Battery Monitoring Systems
Remote Sensors