DC1496C-B

Demonstration circuit 1496C-B features the LTC2942, a battery gas gauge that measures battery charge and discharge, battery voltage and chip temperature. The demo board includes an external 100mohm (default) sense resistor for a maximum current measurement of 500mA (±50mV current sense voltage range). The sense resistor can be changed, however the software only accepts sense resistors between 0.1mohm to 5ohm. The 2.7V to 5.5V operating range is perfectly suited for single cell Li-Ion batteries. A precision analogue coulomb counter integrates current through the sense resistor between the battery’s positive terminal and the load or charger. The LTC2942 adds battery voltage and on-chip temperature measurement with an internal 14bit no latency ΔΣ™ ADC. The three measured quantities (charge, voltage and temperature) are stored in internal registers accessible via the on-board SMBus/I2C interface.

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