Upconverting Mixer Supports All LTE/Cellular Bands

( 1 Nov 2009 )

A wide bandwidth active upconverting mixer, the LT5578 from Linear Technology delivers high dynamic range performance from 400MHz to 2.7GHz, supporting all of the allocated LTE (Long-Term Evolution) broadband wireless services. At 900MHz, the mixer offers 27dBm output IP3 linearity and best-in-class noise floor of -160.5dBm/Hz at an output level of -5dBm, enabling outstanding transmitter dynamic range. The mixer has 1.4dB conversion gain with integrated RF balun transformers that provide a single-ended RF output and LO (local oscillator) input to simplify designs while reducing external component count. The device's LO input is internally buffered, requiring a drive level of only -1dBm. This results in an outstanding LO-to-RF leakage of -43dBm. The LT5578 is designed to satisfy the requirements of next-generation LTE wireless basestation transmitters and improves the performance of wireless equipment including W-CDMA/UMTS, TD-SCDMA, CDMA2000, CDMA, and GSM/EDGE basestations. The mixer is also ideal for a wide range of communication gears such as cable headend transmitters, microwave broadband transmitters, wireless repeaters, military radios, digital video broadcast systems, 2.4GHz ISM band transmitters, test instrumentation, and micro-cell and pico-cell basestation applications.