The HMC611LP4 from Analog Devices is a RF Detector with Frequency 1 to 10000 MHz, Dynamic Range 63 dB, Supply Voltage 4.5 to 5.5 V, Current 1 to 106 mA, Operating Temperature -40 to 85 Degree C. Tags: Surface Mount, Log Detector. More details for HMC611LP4 can be seen below.