LTC2942-1
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LTC2942-1

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

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Part Details
Part Models 4
1ku List Price
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Features
  • 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
Additional Details
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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 4
1ku List Price
price unavailable

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC2942CDCB-1#TRMPBF
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LTC2942CDCB-1#TRPBF
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LTC2942IDCB-1#TRMPBF
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LTC2942IDCB-1#TRPBF
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Product Lifecycle

PCN

Oct 29, 2020

- 20_0067

Obsolescence of LTC2941-1, LTC2942-1 and LTC2943-1 products

LTC2942CDCB-1#TRMPBF

LAST TIME BUY

LTC2942CDCB-1#TRPBF

Obsolete

LTC2942IDCB-1#TRMPBF

LAST TIME BUY

LTC2942IDCB-1#TRPBF

Obsolete

Filter by Model

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Part Models

Product Lifecycle

PCN

Oct 29, 2020

- 20_0067

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Obsolescence of LTC2941-1, LTC2942-1 and LTC2943-1 products

LTC2942CDCB-1#TRMPBF

LAST TIME BUY

LTC2942CDCB-1#TRPBF

Obsolete

LTC2942IDCB-1#TRMPBF

LAST TIME BUY

LTC2942IDCB-1#TRPBF

Obsolete

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC1496B-D

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

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DC1496B-D

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

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

Product Detail

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.

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.

Purchase Linduino

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