LMH2110 Datasheet | National Semiconductor

Description The LMH2110 is a 45 d B Logarithmic RMS power detector particularly suited for accurate power measurement of modulated RF signals that exhibit large peak-to-average ratios, i.e. large variations of the signal envelope. Such signals are encountered in W-CDMA and LTE cell phones. The RMS measurement topology inherently ensures a modulation insensitive measurement. The device has an RF frequency range from 50 MHz to 8 GHz. It provides an accurate, temperature and supply insensitive, output voltage that relates linearly to the RF input power in d Bm. The LMH2110's excellent conformance to a logarithmic response enables an easy integration by using slope and intercept only, reducing calibration effort significantly. The device operates with a single supply from 2.7V to 5V. The LMH2110 has an RF power detection range from -40 d Bm to 5 d Bm and is ideally suited for use in bination with a directional coupler. Alternatively a resistive divider can be used as well. The device is active for EN = High, otherwise it is in a low power consumption shutdown mode. To save power and prevent discharge of an external filter capacitance, the output (OUT) is high-impedance during shutdown. The LMH2110 power detector is offered in a tiny 6-bump micro SMD package. “Notice: This document is not a datasheet. For more information regarding this product or to order samples please contact your local National Semiconductor sales office or visit http://.national./support/dir.html. Features - - - - - - - - - - Logarithmic root mean square response 45 d B linear-in-d B power detection range Multi-band operation from 50 MHz to 8 GHz LOG conformance better than ±0.5 d B Highly temperature insensitive, ±0.25 d B Modulation independent response, 0.08 d B Minimal Slope and Intercept variation Shutdown functionality Wide supply range from 2.7V to 5V Tiny 6-bump micro SMD package Applications - Multi Mode, Multi band RF power control - GSM/EDGE - CDMA/CDMA2000 - W-CDMA - OFDMA - LTE - Infrastructure...