Description The LTC2944 measures battery charge state battery volt age battery current and its own temperature in portable product applications The wide input voltage range allows use with multicell batteries up to 60V A precision coulomb counter integrates current through a sense resistor between the batterys positive terminal and the load or charger Voltage current and temperature are measured with an internal 14 bit No LatencyADC The measurements are stored in internal registers accessible via the onboard I2C SMBus Interface The LTC2944 features programmable high and low thresh olds for all four measured quantities If a programmed threshold is exceeded the device communicates an alert using either the SMBus alert protocol or by setting a flag in the internal status register The LTC2944 requires only a single low value sense resistor to set the measured current range Parameter Measured accumulated battery charge and discharge3 6V to 60V operating range for multi cell applicationsMaximum temperature and current conversion time 8MSMaximum voltage conversion time 48MSTemperature sensing range 236 85 degreeVoltage current and charging accuracy 1 Detection voltage range 50MVI2C SMBUS interface configurable alarm output charge completion inputQuiescent current 150MAIIC communication frequency 400 900KHZ14 bit zero delay ADC is responsible for measuring voltage current 12 bits and temperature 11 bits IIC hardware address 1100100x x is the read wr