LTC2949ILXE#3ZZPBF

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 monitoring simultaneously the voltage drop over upto 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 isoSPI communication to the host or as SPI interface. It is used in application such as electric and hybrid vehicles, isolated current sensing, backup battery systems, high power portable equipment etc.

• 20bit current measurement with <lt/>1μV offset
• Built-in isolated isoSPI™ or SPI interface
• 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
• Gain error is 0.15% typical, noise is 160nVRMS typical
• Operating temperature is -40°C to 85°C
• Package style is 48-lead plastic eLQFP

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party