LTC2942
Battery Gas Gauge with Temperature, Voltage Measurement
Top
Overview
Features and Benefits
- 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
Product Details
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
Product Categories
Product Lifecycle
Not Recommended for New Designs
This designates products ADI does not recommend broadly for new designs.
Evaluation Kits (1)
Documentation & Resources
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R544 Reliability Data3/26/2018
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DC1496C - Demo Manual8/26/2015
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Power and Thermal Monitoring1/9/2017
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20V Battery Gas Gauge10/22/2013
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I2C Battery Gas Gauges11/17/2011
Tools & Simulations
LTspice
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.
Models for the following parts are available in LTspice:
LTC2942
LTC2942-1
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.
Design Tools
Product Recommendations
LTC2942 Companion Parts
Design Resources
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 Number | Material Declaration | Reliability Data | Pin/Package Drawing | CAD Symbols, Footprints & 3D Models |
|---|---|---|---|---|
| LTC2942CDCB#TRMPBF | Material Declaration | Reliability Data | 6-Lead DFN (2mm x 3mm w/ EP) | |
| LTC2942CDCB#TRPBF | Material Declaration | Reliability Data | 6-Lead DFN (2mm x 3mm w/ EP) | |
| LTC2942IDCB#TRMPBF | Material Declaration | Reliability Data | 6-Lead DFN (2mm x 3mm w/ EP) | |
| LTC2942IDCB#TRPBF | Material Declaration | Reliability Data | 6-Lead DFN (2mm x 3mm w/ EP) | |
| Wafer Fabrication Data | R544 Reliability Data |
Sample & Buy
Ordering FAQs
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Buy Now Pricing
(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
List Pricing
(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Lead Times
Please see the latest communication from our CCO regarding lead times.
Sampling
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Evaluation Boards
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.