LTC5548IUDB#TRPBF is an Analog Devices rf passive mixer.
The manufacturer positions the series this way: Upconversion or Downconversion High IIP3: +24.4dBm at 5.8GHz +21.4dBm at 9GHz 7.1dB Conversion Loss at 5.8GHz +15.2dBm Input P1dB at 5.8GHz Integrated LO Buffer: 0dBm LO Drive Selectable Integrated LO Frequency Doubler Low LO-RF Leakage: <-30dBm 50Ω Wideband Matched RF and LO Ports 3.3V/120mA Supply Fast Turn ON/OFF for TDD Operation 3mm ×.
Its advantage is that the specification is backed by a published data sheet, so the part can be designed into production equipment without further characterisation.
Its advantage is that the part is specified for the function it performs, so the design does not depend on characterisation work of its own.
Within the family, this ordering code is the one specified for 3.0–3.6 V; 120 mA typ at 3.3 V with LO doubler off supply voltage.
It is used in embedded control and instrumentation, where the specification has to hold over the life of the equipment.
