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LTC2943-1
1A Multicell Battery Gas Gauge with Temperature, Voltage and Current Measurement
Alternative Parts
Overview
Features and Benefits
- Measures Accumulated Battery Charge and Discharge
- 3.6V to 20V Operating Range for Multiple Cells
- Integrated 50mΩ High Side Sense Resistor
- ±1A Current Sense Range
- 14-Bit ADC Measures Voltage, Current and Temperature
- 1% Voltage, Current and Charge Accuracy
- High Side Sense
- General Purpose Measurements for Any Battery Chemistry and Capacity
- I2C/SMBus Interface
- Configurable Alert Output/Charge Complete Input
- Quiescent Current Less Than 120μA
- Small 8-Lead 3mm × 3mm DFN Package
Product Details
The LTC2943-1 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 20V. 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 onboard I2C/SMBus Interface.
The LTC2943-1 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.
Applications
- Power Tools
- Portable Medical Equipment
- Video Cameras
Product Lifecycle
Not Recommended for New Designs
This designates products ADI does not recommend broadly for new designs.
Evaluation Kits (1)
Documentation
Reliability Data (1)
User Guides (1)
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:
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.
Reference Materials
Product Selector Card (2)
Technical Articles (1)
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.
PCN-PDN Information
Support & Discussions
LTC2943-1 Discussions
Sample & Buy
The USA 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. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.