Features and Benefits
- Measures Current, Voltage, Power, Charge, Energy
- ±65A Current Range with Low 18mA Offset
- Integrated 150µΩ 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 38-Lead 5mm × 7mm QFN Package
The LTC2947-65 is a high precision power and energy monitor with an internal sense resistor supporting up to ±65A*. Three internal No Latency Δ∑™ ADCs ensure accurate measurement of voltage and current, while highbandwidth 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 150µΩ, 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 quanities are stored in internal registers accessible via the selectable I2C/SPI interface. The LTC2947-65 features programmable high and low thresholds for all measured quantities to reduce digital traffic with the host.
- Telecom Infrastructure
- Electric Vehicles
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Demonstration circuit 2826A features the LTC2947-65, a high precision power and energy meter with an internal 65A sense resistor. Three internal ΔΣ ADCs ensure accurate measurement of voltage (0V to 15V) and current (–65A to 65A), while high bandwidth analog multiplication of voltage and current provides accurate power measurement (–975W to 975W) in a wide range of applications. Internal or external clocking options enable precise charge and energy measurements.
Efficiency loss and external part count are minimized by an internal 150µΩ, temperature compensated sense resistor, simplifying energy measurement applications while enabling high accuracy current measurement over the full temperature range.
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.
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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.