DC2826A Analog Devices

DEMO MANUAL DC2826A LTC2947-65 65A Power/Energy Monitor with Integrated Sense Resistor DESCRIPTION Demonstration circuit 2826A features the LTC 2947-65, of positive and negative currents is possible. Voltage can a high precision power and energy meter with an internal be measured across any nodes, for example, directly at 65A sense resistor. Three internal ADCs ensure ac- the load terminals or at the power supply. curate measurement of voltage (0V to 15V) and current Current and power are internally accumulated for charge (65A to 65A), while high bandwidth analog multiplication and energy measurement in two individual sets of registers. of voltage and current provides accurate power measure- Each set of registers also includes a time base counter. ment (975W to 975W) in a wide range of applications. This makes in total six accumulators, where each can be Internal or external clocking options enable precise charge started, stopped and reprogrammed individually to provide and energy measurements. maximum flexibility in many applications. The accumula- Efficiency loss and external part count are minimized tors have a size of 48 bits for charge and energy and 32 by an internal 150, temperature compensated sense bits for time. resistor, simplifying energy measurement applications Minimum and maximum values are stored and an over while enabling high accuracy current measurement over range alert with programmable thresholds minimizes the the full temperature range. need for software polling. Data is reported via a standard 2 All measured quantities are stored in internal registers acces- I C or SPI interface. Sleep mode reduces power consump- 2 sible via the selectable I C/SPI interface. The LTC2947-65 tion to less than 10A. features programmable high and low thresholds for all The DC2826A was designed to be connected to the DC2026 measured quantities to reduce digital traffic with the host. or DC590 and controlled through the Linduino-Sketch The operating voltage ranges are 4.5V to 15V for AVCC/ or QuikEval software. All configuration and measure- DVCC and 1.8V to 5V for OVDD. ment data can be written and read through the QuikEval interface, which provides a convenient way to evaluate The current and voltage measurement inputs can be con- the LTC2947-65. nected independently from each other to an external load and power supply. Thus, high side and low side sensing Design files for this circuit board are available. All registered trademarks and trademarks are the property of their respective owners. Rev (0) 1DEMO MANUAL DC2826A QUICK START PROCEDURE Various features of the DC2826A can be demonstrated The DC2026 comes preloaded with a DC590 emulator by using Analog Devices QuikEval Software. QuikEval is firmware which allows for easy interfacing with QuikEval. a USB-based product demonstration and data acquisition Connection is done the same way as for the DC590 (Figure software meant to be used in conjunction with the DC590 1). QuikEval will launch the graphical user interface (GUI) that connects to individual daughter cards for specific as it would with the DC590. The DC2026 can also be used Analog Devices products. This software can be found on as a development platform, example software along with Analog Devices website at: drivers can be found on the product landing page: