The ADL5513S from Analog Devices is a RF Detector with Frequency 1 MHz to 4 GHz, Max Input Power 20 dBm, Dynamic Range 50 to 80 dB, Capacitance 0.4 to 0.5 pF, Supply Voltage 2.7 to 5 V. Tags: Surface Mount, Log Detector. More details for ADL5513S can be seen below.