LTC2942-1

Obsolete

1A Battery Gas Gauge with Internal Sense Resistor and Temperature/Voltage Measurement

Part Models: 2
1ku List Price: price unavailable

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Part Details

Indicates Accumulated Battery Charge and Discharge
SMBus/I²C Interface
Integrated 50mΩ High Side Sense Resistor
±1A Sense Current Range
High Accuracy Analog Integration
ADC Measures Battery Voltage and Temperature
Integrated Temperature Sensor
1% Voltage and Charge Accuracy
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

The LTC2942-1 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 an internal 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 onboard SMBus/I²C interface.

The LTC2942-1 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.


	Integrated Sense Resistor
LTC2942	No
LTC2942-1	Yes

Applications

Low Power Handheld Products
Cellular Phones
MP3 Players
Cameras
GPS

Part Models: 2
1ku List Price: price unavailable

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
LTC2942CDCB-1#TRPBF	6-Lead DFN (2mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LTC2942IDCB-1#TRPBF	6-Lead DFN (2mm x 3mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Oct 29, 2020 - 20_0067 Obsolescence of LTC2941-1, LTC2942-1 and LTC2943-1 products
		PDN20_0067_Form Material_Report
LTC2942CDCB-1#TRPBF	Obsolete
LTC2942IDCB-1#TRPBF	Obsolete

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

Hardware Ecosystem

Parts	Product Life Cycle	Description
Battery Fuel Gauge and Coulomb Counter 1
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

Tools & Simulations

LTspice 1

LTC2942-1 - Battery Management

Models for the following parts are available in LTspice:

LTC2942
LTC2942-1

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

LTC2942-1 Demo Board | Battery Gas Gauge w/ I2C (req. DC590)

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Product Details

Demonstration circuit 1496C-A features the LTC2941. Demonstration circuit 1496C-B features the LTC2942. Demonstration circuit 1496C-C features the LTC2941-1. Demonstration circuit 1496C-D features the LTC2942-1. The C, D options have parts that use an internal sense resistor while the A, B options rely on an external precision sense resistor. All four devices measure battery charge state in handheld PC and portable product applications. The operating range is perfectly suited for single cell Li-Ion batteries. A precision analog coulomb counter integrates current through a 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 onboard SMBus/I²C interface.

Resources

DC1496B - Schematic
27.00K

DC1496B - Demo Manual
414.00K

DC1496B - Design Files
611.00K

Latest Discussions

5 Years Ago

LTC2942-1

Part Details

Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Technical Articles 2

Product Selector Card 3