LTC2949

PRODUCTION

Current, Voltage, and Charge Monitor for High Voltage Battery Packs

Data Sheet (Rev. A) Product Selection Table
Part Models
4
1ku List Price
Starting From $24.22
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Part Details

  • Measures Battery Stack Voltage, Current and Power
  • Indicates Accumulated Battery Charge and Energy
  • 20-Bit Current Measurement with <1μV Offset
  • Built-In Isolated isoSPI™ or SPI Interface
  • LTC68xx/ADBMS68xx Compatible, Supports Synchronous Measurements with Cell Monitors
  • Up to 12 Buffered Voltage Measurement Inputs
  • Up to 5 GPIOs, Configurable to Drive Ground, Supply or Toggling at 400kHz
  • High or Low Side Current Sense
  • 0.3% Current and Voltage Accuracy
  • 1% Energy and Charge Accuracy
  • True Average ADCs
  • I2C EEPROM Interface to Store Board Calibration Factors
  • Threshold Registers for all Measured Quantities
  • Engineered for ISO26262 Compliant Systems
  • Open Wire Detection on Input Pins
  • Available in 48-Lead LQFP Package
  • AEC-Q100 Qualified for Automotive Applications
LTC2949
Current, Voltage, and Charge Monitor for High Voltage Battery Packs
LTC2949 Application Circuit LTC2949 Pin Configuration
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

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Evaluation Kits

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schematic 1
DC2617A

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.

eval board
schematic 2
DC2732A

LTC2949 Demo Board | Current, Voltage & Charge Monitor for High Voltage Battery Packs

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Product Details

The DC2732A demonstrates a high voltage battery pack monitor based on the LTC2949. The LTC2949 is a high precision current, voltage, temperature, charge and energy meter for electrical and hybrid vehicles and other isolated current sense applications. It infers charge and energy flowing in and out of the battery pack by simultaneously monitoring the voltage across two sense resistors and the battery pack voltage.

Due to its compatible protocol, the LTC2949 can share the same communication bus with ADI battery stack monitors that contain the isoSPI™ interface.

The LTC2949 is typically powered from an isolated supply and directly connected to the battery stack on the low or high side depending on the shunt position. Resistive high voltage dividers provide connections to high voltage terminals that need to be supervised.

All registered trademarks and trademarks are the property of their respective owners. Protected by U.S. patents, including Patents 8908779, 9182428, 92701.

eval board
schematic 3
schematic 4
schematic 5
schematic 6
schematic 7
DC1941D

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).


 
DC2617A
LTC6820 Demo Board | Arduino Interface for isoSPI or Isolated CAN
DC2617A
DC2732A
LTC2949 Demo Board | Current, Voltage & Charge Monitor for High Voltage Battery Packs
DC2732A
DC1941D
LTC6820 isoSPI Demoboard (DC590B required)
DC1941D Demo Board DC1941D Demo Board DC1941D Demo Board DC1941D Demo Board DC1941D - Schematic

Latest Discussions

6 Weeks Ago
RE: Problem with Decoding the data received from LTC2949 for V1, V2, V3. Fast AUX Round-Robin Measurements
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