LTC2943
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LTC2943

Multicell Battery Gas Gauge with Temperature, Voltage and Current Measurement

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Part Models 4
1ku List Price Starting From $2.84
Features
  • Measures Accumulated Battery Charge and Discharge
  • 3.6V to 20V Operating Range for Multiple Cells Application
  • 14-Bit ADC Measures Voltage, Current and Temperature
  • 1% Voltage, Current and Charge Accuracy
  • ±50mV Sense Voltage Range
  • 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
Additional Details
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The LTC2943 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 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. The LTC2943 requires only a single low value sense resistor to set the measured current range.

Applications

  • Power Tools
  • Electric Bicycles
  • Portable Medical Equipment
  • Video Cameras
Part Models 4
1ku List Price Starting From $2.84

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Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

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Jul 26, 2022

- 22_0181

LTC2943 Die Revision

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PRODUCTION

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LTC2943IDD#PBF

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Jul 31, 2020

- 20_0245

Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)

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Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Jul 26, 2022

- 22_0181

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LTC2943 Die Revision

LTC2943CDD#PBF

PRODUCTION

LTC2943CDD#TRPBF

PRODUCTION

LTC2943IDD#PBF

PRODUCTION

LTC2943IDD#TRPBF

PRODUCTION

Jul 31, 2020

- 20_0245

arrow down

Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)

LTC2943CDD#PBF

PRODUCTION

LTC2943CDD#TRPBF

PRODUCTION

LTC2943IDD#PBF

PRODUCTION

LTC2943IDD#TRPBF

PRODUCTION

Evaluation Kits 1

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DC1812A-A

LTC2943 Demo Board | 20VIN, 0.5A Battery Gas Gauge w/ Ext RSENSE (requires DC2026)

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DC1812A-A

LTC2943 Demo Board | 20VIN, 0.5A Battery Gas Gauge w/ Ext RSENSE (requires DC2026)

LTC2943 Demo Board | 20VIN, 0.5A Battery Gas Gauge w/ Ext RSENSE (requires DC2026)

Product Detail

Demonstration circuit 1812A (Figure 1) features the LTC2943. The LTC2943 has an operating range of 3.6V to 20V making it perfectly suited for multicell battery applications. A precision analog coulomb counter integrates current measured through a sense resistor between the battery’s positive terminal and the load or charger. The default value assembled on the DC1812A-A is 100mΩ for a maximum current measurement of 500mA. The LTC2943 measures voltage, current and temperature with an internal 14-bit No Latency ΔΣ™ ADC. The measurements are stored in internal registers accessible via the onboard SMBus/I2C interface.


 


Tools & Simulations 2

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.

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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