LTC2944

PRODUCTION

60V Battery Gas Gauge with Temperature, Voltage and Current Measurement

Part Models: 5
1ku List Price: Starting From $3.42

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Overview

Measures Accumulated Battery Charge and Discharge
3.6V to 60V Operating Range for Multiple Cells
14-Bit ADC Measures Voltage, Current and Temperature
1% Voltage, Current and Charge Accuracy
±50mV Sense Voltage Range
High Side Sense
I²C Interface/SMBus Interface
General Purpose Measurements for Any Battery Chemistry and Capacity
Configurable Alert Output/Charge Complete Input
Quiescent Current Less Than 150μA
Small 8-Lead 3mm × 3mm DFN Package

The LTC2944 measures battery charge state, battery voltage, battery current and its own temperature in portable product applications. The wide input voltage range allows use with multicell batteries up to 60V. A precision coulomb counter integrates current through a sense resistor between the battery’s positive terminal and the load or charger. Voltage, current and temperature are measured with an internal 14-bit No Latency ΔΣ^™ ADC. The measurements are stored in internal registers accessible via the on-board I²C/SMBus Interface.

The LTC2944 features programmable high and low thresholds for all four 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 LTC2944 requires only a single low value sense resistor to set the measured current range.

Applications

Electric and Hybrid Electric Vehicles
Power Tools
Electric Bicycles, Motorcycles, Scooters
High Power Portable Equipment
Photo Voltaics
Backup Battery Systems

Part Models: 5
1ku List Price: Starting From $3.42

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
LTC2944CDD#PBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2944CDD#TRPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2944IDD#3ZZPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2944IDD#PBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LTC2944IDD#TRPBF	8-Lead DFN (3mm x 3mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Aug 22, 2022 - 22_0199 LTC2944 Die Revision
		PCN22_0199_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LTC2944CDD#PBF
LTC2944CDD#TRPBF
LTC2944IDD#3ZZPBF
LTC2944IDD#PBF
LTC2944IDD#TRPBF
Jul 31, 2020 - 20_0245 Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)
		PCN20_0245_Form Material_Report Delta Qualification Matrix Other Qualification Results Summary
LTC2944CDD#PBF
LTC2944CDD#TRPBF
LTC2944IDD#3ZZPBF
LTC2944IDD#PBF
LTC2944IDD#TRPBF

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

Software Resources

Device Drivers 1

LTC294x GitHub Linux Driver Source Code

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Hardware Ecosystem

Parts	Product Life Cycle	Description
LTC2943	NOT RECOMMENDED FOR NEW DESIGNS	Multicell Battery Gas Gauge with Temperature, Voltage and Current Measurement
LTC2943-1	Obsolete	1A Multicell Battery Gas Gauge with Temperature, Voltage and Current Measurement

Tools & Simulations

Linduino 3

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

LTC2944 Demo Board | 60V Battery Gas Gauge (requires DC2026)

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Product Details

Demonstration circuit 1812A-B features the LTC2944. Demonstration circuit 1812A-C features the LTC2943-1. The LTC2943/LTC2943-1 has an operating range of 3.6V to 20V, while the LTC2944 has an operating range of 3.6V to 60V, making all three devices perfectly suited for multicel battery applications. A precision analog coulomb counter integrates current measured through a sense resistor between the battery’s positive terminal and the load or charger. The LTC2943/LTC2943-1 measures voltage, current and temperature with an internal 14-bit No Latency ∆∑™ ADC. The LTC2944 measures voltage, current and temperature with an internal 16-bit No Latency ∆∑ADC. The measurements are stored in internal registers accessible via the onboard SMBus/I²C interface.