DC1496B-D

DC1496B-D demonstration circuit features the LTC2942-1 battery gas gauge. It measures battery charge state, battery voltage and chip temperature in handheld PC and portable product applications. Its operating range is perfectly suited for single cell li ion batteries. A precision coulomb counter integrates current through an internal sense resistor between the battery's positive terminal and the load or charger. Battery voltage and on chip temperature are measured with an internal 14bit no latency delta sigma ADC. The three measured quantities (charge, voltage and temperature) are stored in internal registers accessible via the onboard I2C interface. The LTC2942-1 features programmable high and low thresholds for all three measured quantities. If a programmed threshold is exceeded, the device communicates an alert by setting a flag in the internal status register.