ADI LTC2941CMS8E#PBF

The LTC2941 measures battery charge state in battery-supplied 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 a sense resistor between the battery's positive terminal and the load or charger. The measured charge is stored in internal registers. An SMBus/I²C interface accesses and configures the device. The LTC2941 features programmable high and low thresholds for accumulated charge. If a threshold is exceeded, the device communicates an alert using either the SMBus alert protocol or by setting a flag in the internal status register. The LTC2941 requires only a single low value external sense resistor to set the current range.

• Indicates Accumulated Battery Charge and Discharge
• High Accuracy Analog Integration
• High Side Sense
• 1% Charge Accuracy
• ±50mV Sense Voltage Range
• SMBus/I²C Interface
• Configurable Alert Output/Charge Complete Input
• 2.7V to 5.5V Operating Range
• Quiescent Current Less Than 100μA
• Small 6-Pin 2mm × 3mm DFN and 8-Lead MSOP Packages

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