LTC2941

NOT RECOMMENDED FOR NEW DESIGNS

Battery Gas Gauge with I²C Interface

Data Sheet (Rev. C) Product Selection Table

Part Models: 7
1ku List Price: Starting From $1.59

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Part Details

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

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

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LTC2941CDCB#TRMPBF	6-Lead DFN (2mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2941CDCB#TRPBF	6-Lead DFN (2mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2941CMS8E#PBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2941CMS8E#TRPBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2941IDCB#TRMPBF	6-Lead DFN (2mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2941IMS8E#PBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2941IMS8E#TRPBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jun 5, 2024 - 24_0004 Epoxy Change from Henkel 8290 to 8290A for MSOP (3)
		PCN24_0004_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC2941CMS8E#PBF	LAST TIME BUY
LTC2941CMS8E#TRPBF	LAST TIME BUY
Feb 3, 2020 - 20_0128 Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0128_Form Material_Report
LTC2941CMS8E#PBF	LAST TIME BUY
LTC2941CMS8E#TRPBF	LAST TIME BUY
LTC2941IMS8E#PBF	LAST TIME BUY
LTC2941IMS8E#TRPBF	LAST TIME BUY
Oct 11, 2022 - 22_0244 Epoxy Change from Henkel 8290 to 8290A for MSOP Package
		PCN22_0244_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC2941IMS8E#PBF	LAST TIME BUY
LTC2941IMS8E#TRPBF	LAST TIME BUY
Jul 12, 2022 - 22_0157 UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages [With Modification in BOM]
		PCN22_0157_Form Material_Report Qualification Results Summary Delta Qualification Matrix Detailed Parts List
LTC2941IMS8E#PBF	LAST TIME BUY
LTC2941IMS8E#TRPBF	LAST TIME BUY
Jun 21, 2022 - 22_0050 UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices
		PCN22_0050_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC2941IMS8E#PBF	LAST TIME BUY
LTC2941IMS8E#TRPBF	LAST TIME BUY
Dec 22, 2023 - 23_0118 Production Discontinuation Of LTC2941 and LTC2942
		PDN23_0118_Form Material_Report
LTC2941CDCB#TRMPBF	LAST TIME BUY
LTC2941CDCB#TRPBF	LAST TIME BUY
LTC2941CMS8E#PBF	LAST TIME BUY
LTC2941CMS8E#TRPBF	LAST TIME BUY
LTC2941IDCB#TRMPBF	LAST TIME BUY
LTC2941IMS8E#PBF	LAST TIME BUY
LTC2941IMS8E#TRPBF	LAST TIME BUY

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

Software Resources

Device Drivers 1

LTC294x GitHub Linux Driver Source Code NEW

Hardware Ecosystem

Parts	Product Life Cycle	Description
Battery Fuel Gauge and Coulomb Counter 2
LTC2942	NOT RECOMMENDED FOR NEW DESIGNS	Battery Gas Gauge with Temperature, Voltage Measurement
LTC2943	PRODUCTION	Multicell Battery Gas Gauge with Temperature, Voltage and Current Measurement
I²C Isolators 1
LTM2883	PRODUCTION	SPI/Digital or I²C μModule Isolator with Adjustable ±12.5V and 5V Regulated Power

Tools & Simulations

LTspice 1

LTC2941 - Battery Management

Models for the following parts are available in LTspice:

LTC2941
LTC2941-1

Linduino 3

Design Tool 1

LTC2941/LTC2942 - Calculator Tool

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 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

Evaluation Kits

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

Buy Now View Details

Product Details

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.

Resources

DC1496C - Design Files
863.00K

DC1496C - Demo Manual
1.00M

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

Buy Now View Details

Product Details

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.

Resources

DC1496B - Schematic
27.00K

DC1496B - Demo Manual
414.00K

DC1496B - Design Files
611.00K

Latest Discussions

2 Years Ago

LTC2941

Part Details

Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Technical Articles 2

Product Selector Card 3

Device Drivers 1

Software Resources

Device Drivers 1

Evaluation Software 0

Hardware Ecosystem

Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

Linduino 3

Design Tool 1

Evaluation Kits

Product Details

Resources

Product Details

Resources

Latest Discussions

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