LMH2120

LMH2120 www.ti.com SNWS021C – JULY 2010 – REVISED FEBRUARY 2013 LMH2120 6 GHz Linear RMS Power Detector with 40 dB Dynamic Range Check for Samples: LMH2120 FEATURES 1 2 Linear Root Mean Square Response 40 dB Linear-in-V Power Detection Range Multi-Band Operation from 50 MHz to 6 GHz Lin Conformance Better than ±0.5 dB Highly Temperature Insensitive Modulation Independent Response Minimal Slope and Intercept Variation Shutdown Functionality Wide Supply Range from 2.7V to 5V Tiny 6-Bump DSBGA Package APPLICATIONS Multi Mode, Multi Band RF Power Control – GSM/EDGE – CDMA/CDMA2000 – W-CDMA – OFDMA – LTE Infrastructure RF Power Control DESCRIPTION The LMH2120 is a 40 dB Linear RMS power detector particularly suited for accurate power measurement of modulated RF signals that exhibit large peak-toaverage 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 6 GHz. It provides an accurate, temperature and supply insensitive, output voltage that relates linearly to the RF input power in volt. The LMH2120's excellent conformance to a linear 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 LMH2120 has an RF power detection range from -35 d...