EM773 energy metering IC design example

The NXP EM773 is the world's first-ever, ARM-based product with a metrology engine inside. Included with the metrology engine is automatic, single-phase, power- and energy-measurement for non-billing smart metering applications. The EM773 energy metering IC is designed to remove the complexities of metrology development, enabling designers to focus on product differentiating features. Built around a 32-bit ARM Cortex-M0 core, the EM773 is price- and power-optimized to improve the capabilities of smart metering communication. An open-source, wireless M-bus–based design example using the OL2381 wireless transceiver is provided with the plug meter evaluation hardware to enable easy access to the EM773's feature-rich platform, enabling fast time-to-market.

Below is the recommended IC for use in implementing this design to a system.

• EM773 Energy Metering IC

Energy metering IC with ARM Cortex-M0 for non-billing applications NXP energy metering IC EM773 © September 2010; English; Ordering Code: 9397 750 16986

NXP's OL23xx RF product family, including the transmitter IC OL2300, the receiver IC OL2311, and the transceiver IC OL2381, features efficient transmission power and flexible data rates that make it fully compliant to Wireless M-Bus, the communication protocol for Smart Metering in many European countries. The NXP energy metering ICs and the OL23xx RF products form perfect system solutions for Smart Metering applications.

• OL2300 Fractional-N PLL Based Transmitter
• OL2311 Integrated UHF Receiver
• OL2381 Integrated UHF Transceiver

33-Pin HVQFN

The EM773 metrology engine automatically calculates active power in W, reactive power in VAr, apparent power in VA, RMS voltage and current, power factor and THD. Active power is guaranteed within 1% accuracy from the maximum current load needed by the application down to 1/400 of this maximum current load. In addition, kWh integration is done by the open-source plug meter application using the active power data coming from the metrology engine.

In order to test drive the NXP EM773, make sure to order one of our Wireless Plug Meter demo kits based on the EM773 and the OL2381 wireless M-bus transceiver. Included with this demo kit is also a USB transceiver dongle, powered by an LPC1343 and an OL2381 designed to communicate with the plug meter unit and place the metrology data nicely on a Windows-based PC.

The following demo kits may be ordered by contacting your local sales office or distributor:

• Part Number OM13005: Power Plug Meter US
• Part Number OM13006: Power Plug Meter Europe

• NXP Plug Meter, Including Schematics and Gerber Files of Demo Kits OM13005/OM13006 (Sep 16, 2010)
• NXP USB Dongle, Including Schematics and Gerber Files of Demo Kits OM13005/OM13006 (Sep 16, 2010)

The software development kit contains the following items:

• EM773 example application source code for the power plug meter contained in demonstration kit OM13005 and OM13006.
• LPC1343 and OL2381 example application source code for the M-Bus USB dongle shipped with demonstration kit OM13005/OM13006, enabling reception and transmission of M-Bus messages.
• Firmware for the EM773 metrology engine.
• Binary PC application (Windows XP, Windows7) for displaying all plug meters in range including the source code.
• Hardware documentation of the plug meter including the schematics and gerber files of the demo kit OM13005/OM13006.
• Hardware documentation of the USB dongle including the schematics and gerber files of the demo kit OM13005/OM13006.

• NXP EM773 SDK V1.2 (Jan 25, 2011)

Please note that the metrology engine driver library included in the "LIB" directory of the SDK may not be modified. All other open source example code included in the SDK is free for users to modify and distribute with their own EM773 based products. Please carefully review the license agreement included with the EM773 SDK for details.

Our EM773 demo kits support uploading the metrology data to Google's PowerMeter. You can then view the data on an iPhone or on a laptop/desktop computer.

• AN11017 Transceiver OL2381 using wireless M-BUS V2 (May 10, 2011)

• EM773 Video from Embedded World 2011

	Smart Metering Solutions © October 2010; English; Ordering Code: Not Orderable
	EM773 Energy Metering IC Technical Training "The world’s first ARM with smart metering metrology hardware!" Version 1.6 © October 2010; English; Ordering Code: Not Orderable
	Energy metering IC with ARM Cortex-M0 for non-billing applications NXP energy metering IC EM773 © September 2010; English; Ordering Code: 9397 750 16986