The LTC5597 from Analog Devices is a RF Detector with Frequency 100 MHz to 70 GHz, Dynamic Range 35 dB, Capacitance 10 pF to 1 nF, Supply Voltage 2.7 to 3.6 V, Current 33 mA. Tags: Surface Mount, Power Detector. More details for LTC5597 can be seen below.