LTC2941
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LTC2941

Battery Gas Gauge with I2C Interface

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warning : NOT RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 7
1ku List Price Starting From $1.59
Features
  • 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
Additional Details
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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.


Integrated Sense Resistor
LTC2941 No
LTC2941-1 Yes

Applications

  • Low Power Handheld Products
  • Cellular Phones
  • MP3 Player
  • Cameras
  • GPS
Part Models 7
1ku List Price Starting From $1.59

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC2941CDCB#TRMPBF
  • HTML
  • HTML
LTC2941CDCB#TRPBF
  • HTML
  • HTML
LTC2941CMS8E#PBF
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  • HTML
LTC2941CMS8E#TRPBF
  • HTML
  • HTML
LTC2941IDCB#TRMPBF
  • HTML
  • HTML
LTC2941IMS8E#PBF
  • HTML
  • HTML
LTC2941IMS8E#TRPBF
  • HTML
  • HTML

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Product Lifecycle

PCN

Feb 3, 2020

- 20_0128

Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC

LTC2941CMS8E#PBF

LTC2941CMS8E#TRPBF

LTC2941IMS8E#PBF

LTC2941IMS8E#TRPBF

Oct 11, 2022

- 22_0244

Epoxy Change from Henkel 8290 to 8290A for MSOP Package

Jul 12, 2022

- 22_0157

UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages [With Modification in BOM]

Jun 21, 2022

- 22_0050

UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices

Dec 22, 2023

- 23_0118

Production Discontinuation Of LTC2941 and LTC2942

LTC2941CDCB#TRMPBF

LTC2941CDCB#TRPBF

LTC2941CMS8E#PBF

LTC2941CMS8E#TRPBF

LTC2941IDCB#TRMPBF

LTC2941IMS8E#PBF

LTC2941IMS8E#TRPBF

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Feb 3, 2020

- 20_0128

arrow down

Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC

LTC2941CMS8E#PBF

LTC2941CMS8E#TRPBF

LTC2941IMS8E#PBF

LTC2941IMS8E#TRPBF

Oct 11, 2022

- 22_0244

arrow down

Epoxy Change from Henkel 8290 to 8290A for MSOP Package

Jul 12, 2022

- 22_0157

arrow down

UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages [With Modification in BOM]

Jun 21, 2022

- 22_0050

arrow down

UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices

Dec 22, 2023

- 23_0118

arrow down

Production Discontinuation Of LTC2941 and LTC2942

LTC2941CDCB#TRMPBF

LTC2941CDCB#TRPBF

LTC2941CMS8E#PBF

LTC2941CMS8E#TRPBF

LTC2941IDCB#TRMPBF

LTC2941IMS8E#PBF

LTC2941IMS8E#TRPBF

Software and Part Ecosystem

Software and Part Ecosystem

Evaluation Kit

Evaluation Kits 2

reference details image

DC1496B-A

OBSOLETE: LTC2941 Demo Board | 2.7V to 5.25V Battery Gas Gauge with I2C (Requires DC590B)

zoom

DC1496B-A

OBSOLETE: LTC2941 Demo Board | 2.7V to 5.25V Battery Gas Gauge with I2C (Requires DC590B)

OBSOLETE: LTC2941 Demo Board | 2.7V to 5.25V Battery Gas Gauge with I2C (Requires DC590B)

Product Detail

This evaluation board is obsolete and no longer recommended. The replacement board is the DC1496C-A.

Demonstration circuit 1496B-A features the LTC2941, a battery gas gauge that measures battery charge and discharge with an external sense resistor (100mΩ sense resistor included), yielding 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 measured charge is stored in internal registers accessible via the on-board SMBus/I2C interface.

reference details image

DC1496C-A

LTC2941 Demo Board | 2.7V to 5.25V Battery Gas Gauge with I2C (Requires DC590B)

zoom

DC1496C-A

LTC2941 Demo Board | 2.7V to 5.25V Battery Gas Gauge with I2C (Requires DC590B)

LTC2941 Demo Board | 2.7V to 5.25V Battery Gas Gauge with I2C (Requires DC590B)

Product Detail

Demonstration circuit 1496C-A features the LTC2941, a battery gas gauge that measures battery charge and discharge with an external sense resistor (100mΩ sense resistor included), yielding 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 measured charge is 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.

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