EM783-SCE

NXP energy measurement IC EM783 Application processor for energy measurement with metrology engine Available in a number of variants that support different configurations, this highly integrated yet low-cost application processor uses a powerful ARM Cortex-M0 core and delivers accuracy up to 1%. KEY FEATURES `` Up to 1% accuracy metrology engine `` Dynamic range up to 1,000: 1 below the maximum current load `` Multiple variants for design flexibility: single- and multi-channel, single- and three-phase `` Configurable uptime for period of measurement `` Power line frequency detection and tracking of power-line frequency `` Built-in temperature sensor with accuracy to within 3 °C. `` ARM Cortex-M0 (up to 48 MHz) `` 4 kB on-chip EEPROM for calibration parameters and energy consumption log `` 32 kB flash memory `` 8 kB SRAM memory `` Integrated serial peripherals (UART, SPI, I2C, GPIO, counter/ timer, watchdog timer) `` Up to 22 GPIOs depending on the number of peripherals used `` 33-pin HVQFN package KEY APPLICATIONS `` Smart plugs and plug meters `` Single-phase residential meters `` DALI/DMX and KNX nodes with metering functionality `` Industrial sub-meters `` Power monitors for servers `` Smart appliances GENERAL DESCRIPTION The EM783 is an application processor for energy measurement. It includes a built-in metrology engine with an accuracy of up to 1%, and is available in several variants to support a range configuration requirements. Each variant is built around a lowpower, cost-effective, industry-standard ARM Cortex-M0 core that runs at up to 48 MHz and includes 4 kB of EEPROM, 32 kB of flash, 8 kB of SRAM, and a number of serial peripherals. Each variant also includes an on-chip temperature sensor. The variants are configured for single-channel (SC), single-phase (SP), three-phase (TP), and multi-channel (MC) operation. The SP variant, for example, is an ideal fit for billing-grade, single-phase electricity meters. With a scalable input source of 120 or 230 V and a power-line frequency of between 45 and 65 Hz, the EM783 delivers an accuracy of 1%. It maintains this accuracy over a dynamic range of 1,000:1 below the maximum current load. DEVELOPMENT PLATFORM For fast time-to-market, NXP offers a complete EM783 development platform that supports single- and multi-channel applications. The device performs a number of calculations: power in W, reactive power in VAr, apparent power in VA, power factor, Vrms, Irms, THD, and power-line frequency. It can compensate for temperature variations and can store calibration data in the on-chip EEPROM. The development platform includes an evaluation board equipped with an LCD panel and a USB interface. The designer can view metrology data directly on the board’s LCD panel or, with the board connected to a PC, can use the platform’s PC application to generate graphs for voltage, current, harmonics, and so on. The EM783 runs an open-source application that generates kWh data, and works with an easy-to-use API that lets the designer initialize, start, stop, and read data from the Cortex-M0 CPU. Portions of the development platform, including the application software, a schematic of the EM783 evaluation board, and the PC application, are available for download, free of charge. Please contact NXP for details. EM783 block diagram Metrology Engine with Cortex-M0 48 MHz 4 kB EEPROM 8 kB SRAM 32 kB Flash Net Frequency Advanced Peripheral Bus Tracking Temperature Sensor   1x SPI 1x 12C 1x UART RS485 / IrDA Selection guide Product Type I/U channels Accuracy SRAM Flash CPU (minimum) EM783-SC Single-channel 1x current, 1x voltage 1% 7.5 KB 28 KB 24 MHz EM783-SP Single-phase 2x current, 1x voltage 1% 7.2 KB 26 KB 24 MHz Multi-channel 3x current, 1x voltage 1% 7.2 KB 26 KB 36 MHz EM783-TP Three-phase 3x current, 3x voltage 2% 6.5 KB 24 KB 36 MHz EM783-MC6 Multi-channel 6x current, 1x voltage 2% 6.5 KB 24 KB 36 MHz EM783-MC3 www.nxp.com © 2013 NXP Semiconductors N.V. All rights reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The Date of release: December 2013 information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and Document order number: 9397 750 17322 may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof Printed in the Netherlands does not convey nor imply any license under patent- or other industrial or intellectual property rights.