Overview

Features and Benefits

  • 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

Product Details

The LTC6820 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 logic states. The isolation barrier can be bridged by a simple pulse transformer to achieve hundreds of volts of isolation.

The LTC6820 drives differential signals using matched source and sink currents, eliminating the requirement for a transformer center tap and reducing EMI. Precision window comparators in the receiver detect the differential signals. The drive currents and the comparator thresholds are set by a simple external resistor divider, allowing the system to be optimized for required cable lengths and desired signal-to-noise performance.

Applications

  • Industrial Networking
  • Battery Monitoring Systems
  • Remote Sensors

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits (4)

Product Recommendations

LTC6820 Companion Parts

Recommended Related Parts

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

Discussions

LTC6820 Didn't find what you were looking for? Ask the Analog community »

Sample & Buy

Sample & Buy functionality exists in desktop site
Back
Check Inventory


The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.


Price Table Help

 

Evaluation Boards Pricing displayed is based on 1-piece.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.