**LTC5548IUDB#TRPBF: A High-Performance 6GHz to 14GHz Microwave Downconverting Mixer**

The **LTC5548IUDB#TRPBF** from Analog Devices represents a significant advancement in microwave frequency conversion technology. This integrated circuit is a high-performance, passive double-balanced mixer designed specifically for demanding downconversion applications in the **6GHz to 14GHz RF input range**. Its primary function is to translate high-frequency microwave signals to a lower, more manageable intermediate frequency (IF), a critical process in modern radar systems, satellite communications, point-to-point radio links, and sophisticated test equipment.

A key feature of the LTC5548 is its **exceptionally low conversion loss**, typically just 8.2dB at 12GHz. This performance is crucial for maintaining the overall system noise figure and signal integrity. Complementing this is its outstanding **LO-to-RF isolation**, which can be as high as 47dB. This high level of isolation is vital for preventing the powerful local oscillator signal from leaking back into the RF port and causing interference or measurement inaccuracies. Furthermore, the mixer boasts a high input third-order intercept point (IIP3), ensuring superior linearity and the ability to handle strong interfering signals without generating significant distortion.

The device is engineered for ease of use and integration. It requires a comparatively low **Local Oscillator (LO) drive power** of just +10dBm to achieve specified performance, simplifying the design of the LO signal chain. Housed in a compact, RoHS-compliant 2mm x 2mm 8-lead DFN package, the LTC5548 is built for robust operation across an industrial temperature range from -40°C to +105°C. Its passive core architecture also means it requires no external DC power, contributing to a simpler and more efficient system design.

In summary, the LTC5548IUDB#TRPBF stands out as a premier solution for high-frequency downconversion, offering an optimal blend of low conversion loss, high isolation, and robust linearity in a minimal footprint.

**ICGOOODFIND:** The LTC5548IUDB#TRPBF is a top-tier microwave mixer that delivers high performance and integration for next-generation communication and radar systems.

**Keywords:** Downconverting Mixer, Microwave Frequency, Low Conversion Loss, High Isolation, Linear Performance.