The LMH2110 is a 45-dB Logarithmic RMS power detector particularly designed for accurate power measurement of modulated RF signals that exhibit large peak-to-average ratios; that is, large variations of the signal envelope. The RMS measurement topology inherently makes sure a modulation insensitive measurement.

The device has an RF frequency range from 50 MHz to 8 GHz. The device provides an accurate, temperature, and supply insensitive output voltage that relates linearly to the RF input power in dBm. The LMH2110 device has excellent conformance to a logarithmic response, enabling easy integration by using slope and intercept only, reducing calibration effort significantly. The device operates with a single supply from 2.7 V to 5 V. The LMH2110 has an RF power detection range from –40 dBm to 5 dBm and is designed for use in combination with a directional coupler.

Figure 3-1 LMH2110 Functional Block Diagram