LTC2949 Datasheet | Analog Devices

FEATURES DESCRIPTION n Measures Battery Stack Voltage, Current and Power n Indicates Accumulated Battery Charge and Energy n 20-Bit Current Measurement with <1μV Offset n Built-In Isolated iso SPI™ or SPI Interface n LTC68xx/ADBMS68xx patible, Supports Synchronous Measurements with Cell Monitors n Up to 12 Buffered Voltage Measurement Inputs n Up to 5 GPIOs, Configurable to Drive Ground, Supply or Toggling at 400k Hz n High or Low Side Current Sense n 0.3% Current and Voltage Accuracy n 1% Energy and Charge Accuracy n True Average ADCs n I2C EEPROM Interface to Store Board Calibration Factors n Threshold Registers for all Measured Quantities n Engineered for ISO26262 pliant Systems n Open Wire Detection on Input Pins n Available in 48-Lead LQFP Package n AEC-Q100 Qualified for Automotive Applications APPLICATIONS n Electric and Hybrid Vehicles n Isolated Current Sensing n Backup Battery Systems n High Power Portable Equipment All registered trademarks and trademarks are the property of their respective owners. The LTC®2949 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 monitoring simultaneously the voltage drop over up to two sense resistors and the battery pack voltage. Low offset ΔΣ ADCs ensure accurate measurement of voltage and current with insignificant power loss. Continuous integration of current and power ensures lossless tracking of charge and energy delivered or received by the battery pack. The built-in serial interface can be configured to support isolated iso SPI munication to the host or as SPI interface. The LTC2949 features 12 internally buffered high impedance inputs (V1 to V12) for measuring voltages from external sensors or resistor dividers allowing to measure temperatures, HV-Link voltages, chassis isolation and supervise contactor states. LTC2949 has up to five...