LTC2946
Info : RECOMMENDED FOR NEW DESIGNS
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LTC2946

Wide Range I2C Power, Charge and Energy Monitor

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 28
1ku List Price Starting From $4.72
Features
  • Rail-to-Rail Input Range: 0V to 100V
  • Wide Input Supply Range: 2.7V to 100V
  • Shunt Regulator for Supplies >100V
  • ΔΣ ADC with Less Than ±0.4% Total Unadjusted Error
  • 12-Bit Resolution for Current and Voltages
  • ±1% Accurate Power and Energy Measurements
  • ±0.6% Accurate Current and Charge Measurements
  • Additional ADC Input Monitors an External Voltage
  • Internal ±5% or External Time Bases
  • Continuous Scan and Snapshot Modes
  • Stores Minimum and Maximum Values
  • Alerts When Limits Exceeded
  • Split SDA Pin Eases Opto-Isolation
  • Shutdown Mode with IQ < 40μA
  • Available in 4mm × 3mm DFN and 16-Lead MSOP Packages
Additional Details
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The LTC2946 is a rail-to-rail system monitor that measures current, voltage, power, charge and energy. It features an operating range of 2.7V to 100V and includes a shunt regulator for supplies above 100V. The current measurement common mode range of 0V to 100V is independent of the input supply. A 12-bit ADC measures load current, input voltage and an auxiliary external voltage. Load current and internally calculated power are integrated over an external clock or crystal or internal oscillator time base for charge and energy. An accurate time base allows the LTC2946 to provide measurement accuracy of better than ±0.6% for charge and ±1% for power and energy. 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 LTC2946 I2C interface includes separate data input and output pins for use with standard or opto-isolated I2C connections. The LTC2946-1 has an inverted data output for use with inverting opto-isolator configurations.

Applications

  • Telecom Infrastructure
  • Industrial Equipment
  • General Purpose Energy Measurement
Part Models 28
1ku List Price Starting From $4.72

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Documentation

Documentation

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

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Feb 4, 2020

- 20_0132

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- 20_0132

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Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

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DC2156A

LTC2946 Demo Board | Wide Range I2C Energy Monitor (requires DC590 or DC2026)

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DC2156A

LTC2946 Demo Board | Wide Range I2C Energy Monitor (requires DC590 or DC2026)

LTC2946 Demo Board | Wide Range I2C Energy Monitor (requires DC590 or DC2026)

Product Detail

Demonstration circuit 2156A features the LTC2946 rail-to-rail system monitor that measures current, voltage, power, energy and charge. It features an operating range of 2.7V to 100V and includes a shunt regulator for operation from supplies above 100V to allow flexibility in the selection of input supply. The current measurement range of 0V to 100V is independent of the input supply. An onboard, 0.4% 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. Energy and charge data are generated by integrating power and current. 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.

Tools & Simulations

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.

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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