0.7GHz to 1.4GHz High Linearity Upconverting Mixer

The LT5519 mixer is designed to meet the high linearity requirements of wireless and cable infrastructure transmission systems. A high speed, internally 50Ω matched, LO amplifier drives a double-balanced mixer core, allowing the use of a low power, single-ended LO source. An RF output transformer is integrated, thus eliminating the need for external matching components at the RF output, while reducing system cost, component count, board area and system-level variations. The IF port can be easily matched to a broad range of frequencies for use in many different applications.

The LT5519 mixer delivers +17.1dBm typical input 3rd order intercept point at 1GHz with IF input signal levels of –10dBm. The input 1dB compression point is typically +5.5dBm. The IC requires only a single 5V supply.

Applications

* Wireless Infrastructure

* Cable Downlink Infrastructure

* Point-to-Point and Point-to-Multipoint Data Communications

* High Linearity Frequency Conversion

* Wide RF Frequency Range: 0.7GHz to 1.4GHz

* 17.1dBm Typical Input IP3 at 1GHz

* On-Chip RF Output Transformer

* On-Chip 50Ω Matched LO and RF Ports

* Single-Ended LO and RF Operation

* Integrated LO Buffer: –5dBm Drive Level

* Low LO to RF Leakage: – 44dBm Typical

* Noise Figure: 13.6dB

* Wide IF Frequency Range: 1MHz to 400MHz

* Enable Function with Low Off-State Leakage Current

* Single 5V Supply

* Small 16-Lead QFN Plastic Package