LTC2942

NOT RECOMMENDED FOR NEW DESIGNS

Battery Gas Gauge with Temperature, Voltage Measurement

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Part Details

  • 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
LTC2942
Battery Gas Gauge with Temperature, Voltage Measurement
Total Charge Error vs Differential Sense Voltage Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Technical Articles 2

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Software Resources

Device Drivers 1

Hardware Ecosystem

Parts Product Life Cycle Description
Battery Fuel Gauge and Coulomb Counter 2
LTC2942-1
Obsolete 1A Battery Gas Gauge with Internal Sense Resistor and Temperature/Voltage Measurement
LTC2943
PRODUCTION Multicell Battery Gas Gauge with Temperature, Voltage and Current Measurement
Dual-Supply Monitors 1
LTC2960
RECOMMENDED FOR NEW DESIGNS 36V Nano-Current Two-Input Voltage Monitor
I²C Isolators 1
LTM2883
PRODUCTION SPI/Digital or I2C μModule Isolator with Adjustable ±12.5V and 5V Regulated Power
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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LTC2942
  • LTC2942-1

Linduino 3

Design Tool 1

LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

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schematic 1
schematic 2
schematic 3
schematic 4
schematic 5
schematic 6
DC1496C-B

LTC2942 Demo Board | 2.7V to 5.5V Battery Gas Gauge Plus Voltage/Temperature Measurements, with I2C (Requires DC590)

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Product Details

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 100mΩ (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 0.1mΩ to 5Ω. The 2.7V to 5.5V operating range is perfectly suited for single cell Li-Ion batteries.


A precision analog 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 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.
DC1496C-B
LTC2942 Demo Board | 2.7V to 5.5V Battery Gas Gauge Plus Voltage/Temperature Measurements, with I2C (Requires DC590)
DC1496C-x Demo Board DC1496C-x Demo Board DC1496C-x Demo Board DC1496C-x Demo Board DC1496C-x Demo Board DC1496C - Schematic

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