Features and Benefits
- Measures Current, Voltage, Power, Charge, Energy
- ±30A Current Range with Low 9mA Offset
- Integrated 300µΩ Sense Resistor
- 0V to 15V Input Range Independent of Supply Voltage
- Instantaneous Multiplication of Voltage and Current
- 0.5% Voltage Accuracy
- 1% Current and Charge Accuracy
- 1.2% Power and Energy Accuracy
- Alerts When Thresholds Exceeded
- Stores Maximum and Minimum Values
- Shutdown Mode with IQ < 10μA
- I2C/SPI Compatible Interface
- Available in 32-Lead 4mm × 6mm QFN Package
The LTC2947 is a high-precision power and energy monitor with an internal sense resistor supporting up to ±30A. Three internal No Latency ΔΣ™ ADCs ensure accurate measurement of voltage and current, while high-bandwidth analog multiplication of voltage and current provides accurate power measurement in a wide range of applications. Internal or external clocking options enable precise charge and energy measurements.
An internal 300µΩ, temperature-compensated sense resistor minimizes efficiency loss and external components, simplifying energy measurement applications while enabling high accuracy current measurement over the full temperature range.
All measured quantities are stored in internal registers accessible via the selectable I2C/SPI interface. The LTC2947 features programmable high and low thresholds for all measured quantities to reduce digital traffic with the host.
- Telecom Infrastructure
- Electric Vehicles
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (2)
Demonstration circuit 2334A features the LTC2947, a high precision power and energy meter with an internal 30A sense resistor. Three internal ΔΣ ADCs ensure accurate measurement of voltage (0V to 15V) and current (–30A to 30A), while high bandwidth analog multiplication of voltage and current provides accurate power measurement (–450W to 450W) in a wide range of applications. Internal or external clocking options enable precise charge and energy measurements.
The DC2574A-KIT is a standalone power/energy monitor that allows users to evaluate the LTC2947 power/energy monitor without a PC. This document describes how to quickly set up and operate the DC2574A-KIT; users should also refer to the DC2334 demo manual and LTC2947 data sheet for more details. The DC2574A-KIT includes all components required for stand-alone operation except for a power supply and load. The DC2574A-KIT operates with any USB compatible power supply and any load compatible with the LTC2947.
Tools & Simulations
Linduino is Analog Devices’ Arduino compatible system for developing and distributing firmware libraries and example code for our integrated circuits.
Solutions Bulletins & Brochures (1)
Technical Articles (1)
Press Releases (1)
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.
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.