LTC2945
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LTC2945

Wide Range I2C Power Monitor

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Linduino LTC2945 Linduino .CPP File Download 7.00KB Linduino LTC2945 Linduino Header File Download 22.00KB Linduino LTC2945 - DC1697A Linduino .INO File Download 39.00KB LTspice LTC2945 - Specialty Amplifiers Download 2.19 KB
Part Models 26
1ku List Price Starting From $4.27
Features
  • Rail-to-Rail Input Range: 0V to 80V
  • Wide Input Supply Range: 2.7V to 80V
  • Shunt Regulator for Supplies >80V
  • ΔΣ ADC with less than ±0.75% Total Unadjusted Error
  • 12-Bit Resolution for Current and Voltages
  • Internal Multiplier Calculates 24-Bit Power Value
  • Stores Minimum and Maximum Values
  • Alerts When Limits Exceeded
  • Additional ADC Input Monitors an External Voltage
  • Continuous Scan and Snapshot Modes
  • Shutdown Mode with IQ < 80μA
  • Split SDA for Opto-Isolation
  • Available in 12-Lead 3mm × 3mm QFN and MSOP Packages
  • AEC-Q100 Qualified for Automotive Applications
Additional Details
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The LTC2945 is a rail-to-rail system monitor that measures current, voltage, and power. It features an operating range of 2.7V to 80V and includes a shunt regulator for supplies above 80V to allow flexibility in the selection of input supply. The current measurement range of 0V to 80V is independent of the input supply. An onboard 0.75% accurate 12-bit ADC measures load current, input voltage and an auxiliary external voltage. A 24-bit power value is generated by digitally multiplying the measured 12-bit load current and input voltage data. Minimum and maximum values are stored and an overrange alert with programmable thresholds minimizes the need for software polling. Data is reported via a standard I2C interface. Shutdown mode reduces power consumption to 20μA.

The LTC2945 I2C interface includes separate data input and output pins for use with standard or opto-isolated I2C connections. The LTC2945-1 has an inverted data output for use with inverting opto-isolator configurations.

APPLICATIONS

  • Telecom Infrastructure
  • Industrial
  • Automotive
  • Consumer
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file View Data Sheet (Rev.C)
Documentation View All Documentation
Linduino LTC2945 Linduino .CPP File Download 7.00KB Linduino LTC2945 Linduino Header File Download 22.00KB Linduino LTC2945 - DC1697A Linduino .INO File Download 39.00KB LTspice LTC2945 - Specialty Amplifiers Download 2.19 KB
Part Models 26
1ku List Price Starting From $4.27
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LTC2945

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Data Sheet

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UPDATED 09/17/2015
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LTC2945: Wide Range I2C Power Monitor Data Sheet (Rev.C)

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UPDATED 12/13/2013
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LTC2945: 範囲の広いI2C電力モニタ データシート

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UPDATED 06/13/2016
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UPDATED 07/01/2013
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3mm × 3mm QFN IC Directly Monitors 0V to 80V Supplies: Features I2C Interface, Peak Value Tracking and Runs from Any Supply redirect icon

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UPDATED 07/01/2013
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0V～80Vの電源を直接モニタする3mm×3mm QFNデバイス：I2Cインタフェース、ピーク値のトラッキングを特長とし、任意の電源で動作 redirect icon

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UPDATED 02/20/2015
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Documentation

Device Drivers 1

LTC2945 GitHub Linux Driver Source Code

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Wide Range I2C Power Monitor
Power and Thermal Monitoring
Power System Manager and Super Sequencer Selection Guide

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Video

2017-09-18

80V Wide Range I<sup>2</sup>C Power Monitor Simplifies Challenging System Monitoring Tasks

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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.

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LTC Quick Evaluation Software
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    RELEASED Sep 05,2024

    • Evaluation Kits 1

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    DC1697A

    LTC2945 Demo Board | Wide Range I2C Power Monitor (requires DC2026)

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    DC1697A

    LTC2945 Demo Board | Wide Range I2C Power Monitor (requires DC2026)

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    DC1697A
    LTC2945 Demo Board | Wide Range I2C Power Monitor (requires DC2026)
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    Product Detail

    Demonstration circuit 1697A features the LTC2945. The LTC2945 is a rail-to-rail system monitor that measures current, voltage, and power. It features an operating range of 2.7V to 80V and includes a shunt regulator for supplies above 80V to allow flexibility in the selection of input supply. The current common mode measurement range of 0V to 80V is independent of the input supply. An onboard 0.75% accurate 12-bit ADC measures load current, input voltage and an auxiliary external voltage. A 24-bit power value is generated by digitally multiplying the measured 12-bit load current and input voltage data. Minimum and maximum values are stored and an overrange alert with programmable thresholds minimizes the need for software polling. Data is reported via a standard I2C interface. The demo board is populated for a 5A application. This can be changed by populating R1 accordingly.


     


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    DC1697A

    LTC2945 Demo Board | Wide Range I2C Power Monitor (requires DC2026)

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    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.

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    Linduino

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