AFE77x8D/AFE7769D RF Transceivers

Texas Instruments AFE77x8D/AFE7769D Quad/Dual Channel RF Transceivers are pin-compatible, high-performance, multichannel transceivers. These integrate four (AFE7768D/AFE7769D) or two (AFE7728D) direct up-conversion transmitter chains and four (AFE7768D/AFE7769D) or two (AFE7728D) direct down-conversion receiver chains. The devices also have two wideband RF sampling digitizing auxiliary chains (feedback paths) and a low-power Digital Pre-Distortion (DPD) engine for Power Amplifier (PA) linearization. The high dynamic range of the transmitter and receiver chains enables wireless base stations to transmit and receive 2G, 3G, 4G, and 5G signals. The integrated Crest Factor Reduction (CFR) unit helps reduce the input signal's Peak-to-Average Ratio (PAR) for more efficient transmission through the Power Amplifier. The integrated hardware accelerated DPD estimator and corrector of the Texas Instruments AFE77x8D/AFE7769D provides a flexible and efficient DPD solution for PA linearization. The integrated DPD engine corrects the distortion due to PA nonlinearity for signals up to 200MHz (AFE7728D/AFE7768D)/300MHz (AFE7769D) instantaneous bandwidth and within up to 650MHz (AFE7728D/AFE7768D)/730MHz (AFE7769D) DPD expanded bandwidth. A dedicated GaN corrector addresses the long-term nonlinear memory effects due to the charge trapping of GaN PAs.