Smart Grid Solutions Guide - Maxim

CommunicationsFeatured productsLow-/high-band transmitter for HANs/NANs extends battery life up to seven yearsMAX7049*The MAX7049 ASK/FSK transmitter offers an inexpensive, low-powersolution for one-way reporting from meters in HANs and someNANs. The transmitter uses the license-free low- and high-frequencybands in the U.S. and Europe, making it a very flexible solution. Theshaped ASK or FSK modulation technique reduces the transmittedfrequency bandwidth so that more frequency channels can be used.The wide selection of data rates and low current drain make it wellsuited for local radio links and networks. This IC is flexible enoughto work with multiple smart grid communication standards and iscompatible with modes S and T of the European M-Bus standard.Benefits••Extends battery life––Low active (< 35mA) and shutdown(< 0.5µA) current conserves battery life••Low BOM cost––Only crystal and matching componentsare needed••Good penetration in buildings––Maximum allowable Tx power (25mW)for European ETSI standardMETER SENSOR (WATER ORGAS VOLUME, FLOW, ETC.)µPCRYSTALHOP ENABLE SDO SCLK SDICSBDATAINMETER OR READERKEYPAD/CONTROLLERANTENNAMATCHINGNETWORKPA+PA-MAX7049*TRANSCEIVERAVDDDVDDSUPPLY,BYPASSV DDMETER OR READERDISPLAY4 Ls4 CsV DDCPVDD CRTLCPOUTPLL FILTER1 R2 CsSystem diagram for the MAX7049.*Future product—contact the factory for availability.www.maxim-ic.com/smartgrid 35