LTC2942
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LTC2942

Battery Gas Gauge with Temperature, Voltage Measurement

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Linduino LTC2942 - DC1496BB.ino Download 37.00KB Linduino LTC2942 - Linduino CPP File Download 6.00KB Linduino LTC2942 - Linduino Header File Download 13.00KB Design Tool LTC2941/LTC2942 - Calculator Tool Download 30.00KB LTspice LTC2942 - Battery Management Download 1.08 KB
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
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Documentation View All Documentation
Linduino LTC2942 - DC1496BB.ino Download 37.00KB Linduino LTC2942 - Linduino CPP File Download 6.00KB Linduino LTC2942 - Linduino Header File Download 13.00KB Design Tool LTC2941/LTC2942 - Calculator Tool Download 30.00KB LTspice LTC2942 - Battery Management Download 1.08 KB
Part Models 4
1ku List Price Starting From $1.83
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LTC2942

Documentation

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Data Sheet

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UPDATED 09/09/2011
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LTC2942: Battery Gas Gauge with Temperature, Voltage Measurement Data Sheet

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UPDATED 11/17/2010
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LTC2942: 温度および電圧測定付きバッテリ・ガスゲージ データシート

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User Guide

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UPDATED 08/26/2015
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DC1496C - Demo Manual redirect icon

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Reliability Data

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UPDATED 03/26/2018
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R544 Reliability Data redirect icon

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UPDATED 04/01/2010
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Tiny, Accurate Battery Gas Gauges with Easy-to-Use I2C Interface and Optional Integrated Precision Sense Resistors redirect icon

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UPDATED 07/10/2017
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High Efficiency Solar MPPT Battery Charger Using LT8611 and AD5245 redirect icon

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UPDATED 07/10/2017
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太陽光発電向けのMPPT対応バッテリ・チャージャ、「LT8611」と「AD5245」で高い効率を実現　 redirect icon

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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#TRMPBF 6-Lead DFN (2mm x 3mm w/ EP) external-link
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  • Material Declaration external-link
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LTC2942CDCB#TRPBF 6-Lead DFN (2mm x 3mm w/ EP) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LTC2942IDCB#TRMPBF 6-Lead DFN (2mm x 3mm w/ EP) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LTC2942IDCB#TRPBF 6-Lead DFN (2mm x 3mm w/ EP) external-link
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  • Material Declaration external-link
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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

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PCN

Dec 22, 2023

- 23_0118

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Production Discontinuation Of LTC2941 and LTC2942

LTC2942CDCB#TRMPBF

LAST TIME BUY

LTC2942CDCB#TRPBF

LAST TIME BUY

LTC2942IDCB#TRMPBF

LAST TIME BUY

LTC2942IDCB#TRPBF

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PDN23_0118_Form

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Software & Part Ecosystem

Parts Product Life Cycle Description

Battery Fuel Gauge and Coulomb Counter2
LTC2942-1
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Cart

Obsolete

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

LTC2943
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Cart

PRODUCTION

Multicell Battery Gas Gauge with Temperature, Voltage and Current Measurement

Dual-Supply Monitors1
LTC2960
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Cart

RECOMMENDED FOR NEW DESIGNS

36V Nano-Current Two-Input Voltage Monitor

I²C Isolators1
LTM2883
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Cart

PRODUCTION

SPI/Digital or I2C μModule Isolator with Adjustable ±12.5V and 5V Regulated Power

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)

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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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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.

Resources

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DC1496C - Design Files Download

863.00K

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DC1496C - Schematic Download

32.00K

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DC1496C - Demo Manual Download

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Evaluation Kits1

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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)

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

spice tool Lt Spice

LTC2942 - Battery Management Download

1.08 K

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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