LTC6811-1
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LTC6811-1

12 Channel Multicell Battery Monitor with Daisy Chain Interface, Generation 4

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Part Details
Part Models 8
1ku List Price Starting From $9.72
Features
  • Pin-Compatible Upgrade from the LTC6804
  • Measures Up to 12 Battery Cells in Series
  • 1.2mV Maximum Total Measurement Error
  • Stackable Architecture for High Voltage Systems
  • Built-in isoSPI Interface
  • 1Mb Isolated Serial Communications
  • Uses a Single Twisted Pair, up to 100 Meters
  • Low EMI Susceptibility and Emissions
  • 290µs to Measure All Cells in a System
  • Synchronized Voltage and Current Measurement
  • 16-Bit ADC with Programmable Noise Filter
  • Engineered for ISO 26262-Compliant Systems
  • Passive Cell Balancing with Programmable Timer
  • 5 General Purpose Digital I/O or Analog Inputs
  • Temperature or other Sensor Inputs
  • Configurable as an I2C or SPI master
  • 4μA Sleep Mode Supply Current
  • 48-Lead SSOP Package
  • AEC-Q100 Qualified for Automotive Applications
Additional Details
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The LTC6811 is a multicell battery stack monitor that measures up to 12 series connected battery cells with a total measurement error of less than 1.2mV. The cell measurement range of 0V to 5V makes the LTC6811 suitable for most battery chemistries. All 12 cells can be measured in 290µs, and lower data acquisition rates can be selected for high noise reduction.

Multiple LTC6811 devices can be connected in series, permitting simultaneous cell monitoring of long, high voltage battery strings. Each LTC6811 has an isoSPI interface for high speed, RF-immune, long distance communications. Using the LTC6811-1, multiple devices are connected in a daisy chain with one host processor connection for all devices. Using the LTC6811-2, multiple devices are connected in parallel to the host processor, with each device individually addressed.

The LTC6811 can be powered directly from the battery stack or from an isolated supply. The LTC6811 includes passive balancing for each cell, with individual PWM duty cycle control for each cell. Other features include an onboard 5V regulator, five general purpose I/O lines and a sleep mode, where current consumption is reduced to 4µA.

Applications

  • Electric and Hybrid Electric Vehicles
  • Backup Battery Systems
  • Grid Energy Storage
  • High Power Portable Equipment
Part Models 8
1ku List Price Starting From $9.72

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Documentation

Documentation

Video

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

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Nov 18, 2019

- 19_0266

Laser Top Mark for SSOP36/44/48 Packages assembled in ADPG and UTAC

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Jun 25, 2019

- 19_0135

LTC6811-1, LTC6811-2 Die Revision Change.

LTC6811HG-1#3ZZPBF

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Filter by Model

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Part Models

Product Lifecycle

PCN

Nov 18, 2019

- 19_0266

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Laser Top Mark for SSOP36/44/48 Packages assembled in ADPG and UTAC

LTC6811HG-1#3ZZPBF

PRODUCTION

LTC6811HG-1#3ZZTRPBF

PRODUCTION

LTC6811HG-1#PBF

PRODUCTION

LTC6811HG-1#TRPBF

PRODUCTION

LTC6811IG-1#3ZZPBF

PRODUCTION

LTC6811IG-1#3ZZTRPBF

PRODUCTION

LTC6811IG-1#PBF

PRODUCTION

LTC6811IG-1#TRPBF

PRODUCTION

Jun 25, 2019

- 19_0135

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LTC6811-1, LTC6811-2 Die Revision Change.

LTC6811HG-1#3ZZPBF

PRODUCTION

LTC6811HG-1#3ZZTRPBF

PRODUCTION

LTC6811HG-1#PBF

PRODUCTION

LTC6811HG-1#TRPBF

PRODUCTION

LTC6811IG-1#3ZZPBF

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LTC6811IG-1#3ZZTRPBF

PRODUCTION

LTC6811IG-1#PBF

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

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DC1941D

LTC6820 isoSPI Demoboard (DC590B required)

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DC1941D

LTC6820 isoSPI Demoboard (DC590B required)

LTC6820 isoSPI Demoboard (DC590B required)

Product Detail

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).


 


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DC2259A

LTC6811-1 Demo Board | 12-Channel Battery Stack Monitor with Daisy-chain Interface

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DC2259A

LTC6811-1 Demo Board | 12-Channel Battery Stack Monitor with Daisy-chain Interface

LTC6811-1 Demo Board | 12-Channel Battery Stack Monitor with Daisy-chain Interface

Product Detail

Demonstration circuit 2259A is a Daisy Chain isoSPI Battery-Stack Monitor featuring the LTC6811-1. Multiple boards can be linked through a 2-wire isolated serial interface to monitor any number of cells on a stack.

Tools & Simulations

Tools & Simulations 1

Linduino

Linduino is Analog Devices’ Arduino compatible system for developing and distributing firmware libraries and example code for our integrated circuits. Each Linduino-supported product includes an example main program, defined in the LTSketchbook/Part Number folder and driver code, defined in the LTSketchbook/libraries folder.

Linduino code repository on GitHub and instructions on how to use the code.

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Code Files

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