I2C 电池电量测量

For applications requiring accurate battery gas gauging, the LTC®2941 and LTC2942 coulomb counters provide tiny and easy-to-use solutions. The LTC2941/LTC2942 use a continuous-time analog integrator, resulting in minimal offset and gain error and better overall charge accuracy. The bidirectional analog integrator accommodates both battery charge and discharge, and a programmable prescaler allows for a wide range of battery capacities. The LTC2942 incorporates a 14-bit ∆∑ ADC to measure battery voltage and die temperature. The LTC2941-1 and LTC2942-1 also integrate a 50mΩ sense resistor to provide up to ±1A measurement range. Charge, voltage* and temperature* are all communicated to the host system over an I2C/SMBus compatible interface.
I C Battery Gas Gauges
2

CHARGER
LOAD


LTC2942-1
HOST +
I2C REGISTER