LTC2942
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LTC2942

Battery Gas Gauge with Temperature, Voltage Measurement

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warning : NOT RECOMMENDED FOR NEW DESIGNS tooltip
warning : NOT RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 4
1ku List Price Starting From $1.83
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
Additional Details
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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
  • Cellular Phones
  • MP3 Players
  • Cameras
  • GPS
Part Models 4
1ku List Price Starting From $1.83

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC2942CDCB#TRMPBF
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LTC2942CDCB#TRPBF
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LTC2942IDCB#TRMPBF
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LTC2942IDCB#TRPBF
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Product Lifecycle

PCN

Dec 22, 2023

- 23_0118

Production Discontinuation Of LTC2941 and LTC2942

LTC2942CDCB#TRMPBF

LAST TIME BUY

LTC2942CDCB#TRPBF

LAST TIME BUY

LTC2942IDCB#TRMPBF

LAST TIME BUY

LTC2942IDCB#TRPBF

LAST TIME BUY

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Dec 22, 2023

- 23_0118

arrow down

Production Discontinuation Of LTC2941 and LTC2942

LTC2942CDCB#TRMPBF

LAST TIME BUY

LTC2942CDCB#TRPBF

LAST TIME BUY

LTC2942IDCB#TRMPBF

LAST TIME BUY

LTC2942IDCB#TRPBF

LAST TIME BUY

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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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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DC1496C-B

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

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

Product Detail

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.

Tools & Simulations

Tools & Simulations 3

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.

Linduino

Linduino is Analog Devices’ Arduino compatible system for developing and distributing firmware libraries and example code for our integrated circuits. Each Linduino-supported product includes an example main program, defined in the LTSketchbook/Part Number folder and driver code, defined in the LTSketchbook/libraries folder.

Linduino code repository on GitHub and instructions on how to use the code.

Purchase Linduino

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