ADI LTC2942IDCB-1#TRPBF

The LTC2942-1 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 14-bit No Latency ΔΣ ADC. The three measured quantities (charge, voltage and temperature) are stored in internal registers accessible via the onboard SMBus/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 using either the SMBus alert protocol or by setting a flag in the internal status register.

• Indicates Accumulated Battery Charge and Discharge
• SMBus/I²C Interface
• Integrated 50mΩ High Side Sense Resistor
• ±1A Sense Current Range
• High Accuracy Analog Integration ADC
• Measures Battery Voltage and Temperature
• Integrated Temperature Sensor
• 1% Voltage and Charge Accuracy
• Configurable Alert Output/Charge Complete Input
• 2.7V to 5.5V Operating Range
• Quiescent Current Less than 100μA
• Small 6-Pin 2mm × 3mm DFN package

• Low Power Handheld Products
• Cellular Phones
• MP3 Players
• Cameras
• GPS