LTC2942

NOT RECOMMENDED FOR NEW DESIGNS

Battery Gas Gauge with Temperature, Voltage Measurement

Analog Devices LTC2942 Product Info

10 February 2026 8

Features

Indicates Accumulated Battery Charge and Discharge
High Accuracy Analog Integration
ADC Measures Battery Voltage and Temperature
Integrated Temperature Sensor
High Side Sense
1% Voltage and 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 package

Part details & applications

The LTC2942 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 a 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 on-board SMBus/I²C interface.

The LTC2942 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.

The LTC2942 requires only a single low value sense resistor to set the measured current range.


	Integrated Sense Resistor
LTC2942	No
LTC2942-1	Yes

Applications

Low Power Handheld Products

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