Analog Devices Inc. LTC2943 Multicell Battery Gas Gauges can measure battery charge state, voltage, current, and temperature in portable product applications. The LTC2943 from Analog Devices has a wide input voltage range that allows use with multicell batteries up to 20V. A precision coulomb counter integrates current through a sense resistor between the battery's positive terminal and the load or charger. Voltage, current, and temperature are measured with an internal 14-bit No Latency ΔΣ™ ADC. The measurements are stored in internal registers accessible via the onboard I2C/SMBus Interface.
Measures accumulated battery charge and discharge
3.6V to 20V operating range for multiple cells application
14-bit ADC measures voltage, current, and temperature
1% voltage, current, and charge accuracy
±50mV sense voltage range
High side sense
General-purpose measurements for any battery chemistry and capacity