LTC6820

PRODUCTION

isoSPI Isolated Communications Interface

Data Sheet (Rev. C) Product Selection Table

Part Models: 12
1ku List Price: Starting From $2.77

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Part Details

AEC-Q100 Qualified for Automotive Applications
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

Part Models: 12
1ku List Price: Starting From $2.77

Documentation

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. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC6820HMS#3ZZPBF	16-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC6820HMS#3ZZTRPBF	16-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC6820HMS#PBF	16-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC6820HMS#TRPBF	16-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC6820HUD#PBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC6820HUD#TRPBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC6820IMS#3ZZPBF	16-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC6820IMS#3ZZTRPBF	16-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC6820IMS#PBF	16-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC6820IMS#TRPBF	16-Lead MSOP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC6820IUD#PBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC6820IUD#TRPBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Oct 11, 2022 - 22_0244 Epoxy Change from Henkel 8290 to 8290A for MSOP Package
		PCN22_0244_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC6820HMS#3ZZPBF	PRODUCTION
LTC6820HMS#3ZZTRPBF	PRODUCTION
LTC6820HMS#PBF	PRODUCTION
LTC6820HMS#TRPBF	PRODUCTION
LTC6820IMS#3ZZPBF	PRODUCTION
LTC6820IMS#3ZZTRPBF	PRODUCTION
LTC6820IMS#PBF	PRODUCTION
LTC6820IMS#TRPBF	PRODUCTION
Apr 18, 2022 - 22_0050 UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices
		PCN22_0050_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC6820HMS#3ZZPBF	PRODUCTION
LTC6820HMS#3ZZTRPBF	PRODUCTION
LTC6820HMS#PBF	PRODUCTION
LTC6820HMS#TRPBF	PRODUCTION
LTC6820IMS#3ZZPBF	PRODUCTION
LTC6820IMS#3ZZTRPBF	PRODUCTION
LTC6820IMS#PBF	PRODUCTION
LTC6820IMS#TRPBF	PRODUCTION
Jul 31, 2020 - 20_0245 Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)
		PCN20_0245_Form Material_Report Delta Qualification Matrix Other Qualification Results Summary
LTC6820HMS#3ZZPBF	PRODUCTION
LTC6820HMS#3ZZTRPBF	PRODUCTION
LTC6820HMS#PBF	PRODUCTION
LTC6820HMS#TRPBF	PRODUCTION
LTC6820HUD#PBF	PRODUCTION
LTC6820HUD#TRPBF	PRODUCTION
LTC6820IMS#3ZZPBF	PRODUCTION
LTC6820IMS#3ZZTRPBF	PRODUCTION
LTC6820IMS#PBF	PRODUCTION
LTC6820IMS#TRPBF	PRODUCTION
LTC6820IUD#PBF	PRODUCTION
LTC6820IUD#TRPBF	PRODUCTION
Feb 4, 2020 - 20_0132 Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0132_Form Material_Report
LTC6820HMS#3ZZPBF	PRODUCTION
LTC6820HMS#3ZZTRPBF	PRODUCTION
LTC6820HMS#PBF	PRODUCTION
LTC6820HMS#TRPBF	PRODUCTION
LTC6820IMS#3ZZPBF	PRODUCTION
LTC6820IMS#3ZZTRPBF	PRODUCTION
LTC6820IMS#PBF	PRODUCTION
LTC6820IMS#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Hardware Ecosystem

Parts	Product Life Cycle	Description
Battery Monitors & Fuel Gauges 3
LTC6804-1	PRODUCTION	12 Channel Multicell Battery Monitor with Daisy Chain Interface, Generation 3
LT8584	RECOMMENDED FOR NEW DESIGNS	2.5A Monolithic Active Cell Balancer with Telemetry Interface
LTC3300-1	RECOMMENDED FOR NEW DESIGNS	High Efficiency Bidirectional Multicell Battery Balancer

Tools & Simulations

IBIS Model 1

LTC6820 IBIS Model

Evaluation Kits

LTC6820 Demo Board | Dual Master isoSPI Adapter

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Product Details

The demonstration circuit DC2792B is an SPI serial to dual-port isoSPI adapter that uses a pair of multiplexed LTC6820 isoSPI transceivers and miniaturized isoSPI connectors (2 contact DuraClik). The board can functionally replace a DC1941 in cases where isoSPI battery-management (BMS) devices are being evaluated, but provides a second isoSPI master to exercise the reversible isoSPI feature where available. The SPI interface can be provided via the legacy 14-contact ribbon cable from either a DC590 or DC2026 USB adapter, or directly installed on the DC2026 as a Linduino shield. The two isoSPI ports are MAIN and AUXiliary, with activity of each indicated by blue LEDs. For use in place of DC1941 or non-reversible isoSPI networks, the MAIN port must be used. Power for the DC2792B comes indirectly from the USB port of the host computer, via the USB to serial adapter being used.

Resources

DC2792B - Demo Manual (Rev.0)
10/14/2020

DC2792B - Design Files
10/14/2020

DC2792B - Schematic
10/14/2020

OBSOLETE: LTC6820 isoSPI 2-Wire Serial Analyzer

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Product Details

This evaluation board is obsolete and no longer recommended. The replacement board is the DC1941D.

Resources

DC1907A - Demo Manual
8/30/2013

DC1907A - Schematic
8/30/2013

DC1907A - Design Files
8/30/2013

Software

DC1907A - GUI Software for use with LTC6804 (see Manual)
611.00K

DC1907A - GUI Software for Generic use (see Manual)
806.00K

LTC6820 isoSPI Demoboard (DC590B required)

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Product Details

Demonstration circuit 1941 is an isoSPI™ transceiver board, based on Linear Technology’s LTC6820. The LTC6820 provides a method of interconnecting standard serial peripheral interface (SPI) devices using a single twisted pair connection. This proprietary 2-wire interface is called isoSPI. The LTC6820 encodes SPI signals, up to 1Mbps, into a differential isoSPI signal which is transmitted via a simple pulse transformer through a twisted pair. At the other end of the twisted pair, the isoSPI signal can be translated back to SPI (using another LTC6820).

Resources

DC1941D - Schematic
6/15/2016

DC1941D - Demo Manual
6/15/2016

DC1941D - Design Files
6/15/2016

12 Cell 4A Controller Board Bi-Directional Active Cell Balancer with LTC3300-1, LTC6804-2 and LTC6820

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Product Details

Demonstration Circuit DC2100B-D is a stackable, bidirectional cell balancer slave board using the LTC6804-2 and the LTC3300-1 ICs to achieve active balancing of up to 12 Li-Ion cells. It requires the DC2100B-C for proper operation. The DC2100B-D uses a single LTC6804-2 Multi-Cell Addressable Battery Stack Monitor IC to measure cell voltages and two LTC3300-1 Synchronous Flyback ICs to provide active cell balancing. The DC2100B-C controller board contains a PIC18F47J53 microcontroller, the LTM2884 isolated USB transceiver, the LTC6804-2, two LTC3300-1 ICs, and the LTC6820 isoSPI Interface IC to facilitate isolated communication. Up to seven DC2100B-D boards can be connected to a DC2100B-C to build a stacked system of eight total boards.

Resources

DC2100B - Software and Users Guide
4/29/2016

DC2100B - Design Files
7/16/2015

DC2100B - Demo Manual
5/12/2017

DC2100B - Schematic
7/16/2015

OBSOLETE: LTC6820 Demo Board | Dual Master isoSPI Adapter

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Product Details

This evaluation board is obsolete and no longer recommended. The replacement board is the DC2792B.

Demonstration circuit DC2792A is an SPI serial to dual-port isoSPI adapter that uses a pair of multiplexed LTC6820 isoSPI transceivers. The board can replace a DC1941 in cases where isoSPI battery-management (BMS) devices are being evaluated, but provides a second isoSPI master to exercise the reversible isoSPI feature where available. The SPI interface can be provided via the legacy 14-contact ribbon cable from either a DC590 or DC2026 USB adapter, or directly installed on the DC2026 as a Linduino ‘shield’. The two isoSPI ports are MAIN and AUXiliary, with activity of each indicated by blue LEDs. For use in place of DC1941, the MAIN port must be used. Power for the DC2792A comes indirectly from the USB port of the host computer, via the USB to serial adapter being used.

Resources

DC2792A - Schematic
4/19/2019

DC2792A - Design Files
4/19/2019

DC2792A - Demo Manual (Rev.0)
6/11/2019

LTC6820 Demo Board | Arduino Interface for isoSPI or Isolated CAN

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Product Details

Demonstration circuit 2617A implements the isoSPI and isolated CAN interface hardware on a single Arduino shield. It allows Arduino-compatible controller boards to communicate with isoSPI and/or CAN bus networks.

Resources

DC2617A - Demo Board Manual
1/18/2018

DC2617A - Design Files
1/18/2018

DC2617A - Schematic
1/18/2018

Cell and Pack Monitoring Kit for Broad Market Applications

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Features and Benefits

Accurate voltage and current measurement
Highly scalable and ease of integration
Robust isoSPI capability implementable in daisy chain high count
Inclusive passive balancing with individual pulse-width modulation
Isolated power supply between microcontroller and battery monitoring devices
High voltage and current supply measurement
Fast overcurrent (OC) measurement
Redundancy measurement
Modular BMS Solution
Ready to use Broadmarket BMS GUI for Evaluation

Product Details

The AD-CELLPACKBM-SL is a complete BMS kit consisting of the EVAL-ADBMS6830BMSW 16-channel cell monitoring module, the EVAL-ADBMS2950-BASIC pack monitoring module, EVAL-ADBMS6822 isoSPI adapter, and a microcontroller board.

The AD-CELLPACKBM-SL can operate either in embedded mode or through a PC-based graphical user interface. Complete with working software and hardware, as well as software examples, this kit makes it easier for customers to prototype and create connected systems and solutions for BMS applications.

This package comes with the SDP-K1 as its MCU module, but the BMS components included in this kit are also compatible for use with other controller boards such as the AD-APARD32690-SL or MAX32690EVKIT.

Upon purchase, the AD-CELLPACKBM-SL kit comes with the following boards and accessories:.

Boards

2x EVAL-ADBMS6830BMSW 16-Channel Battery Cell Monitor (can be purchased separately)
1x EVAL-ADBMS2950-BASIC Battery Pack Monitor (can be purchased separately)
1x EVAL-ADBMS6822 Dual isoSPI Adapter (can be purchased separately)
1x EVAL-SDP-CK1Z (SDP-K1) Controller Board (can be purchased separately)
2x DC2472A Battery Cell Emulator (can be purchased separately)
1x MAX32625PICO Programming Adapter with 10-pin SWD cable (can be purchased separately)

Cables and Other Accessories