LT5520 Datasheet | Linear Technology

.. 1.3GHz to 2.3GHz High Linearity Upconverting Mixer Features s s s s s s s s s s s DESCRIPTIO U APPLICATIO S Wide RF Output Frequency Range: 1.3GHz to 2.3GHz 15.9d Bm Typical Input IP3 at 1.9GHz On-Chip RF Output Transformer No External LO or RF Matching Required Single-Ended LO and RF Operation Integrated LO Buffer: - 5d Bm Drive Level Low LO to RF Leakage: - 41d Bm Typical Wide IF Frequency Range: DC to 400MHz Enable Function with Low Off-State Leakage Current Single 5V Supply Small 16-Lead QFN Plastic Package The LT®5520 mixer is designed to meet the high linearity requirements of wireless and cable infrastructure transmission applications. A high-speed, internally 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 ponents at the RF output, while reducing system cost, ponent 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 LT5520 mixer delivers 15.9d Bm typical input 3rd order intercept point at 1.9GHz with IF input signal levels of - 10d Bm. The input 1d B pression point is typically 4d Bm. The IC requires only a single 5V supply. , LTC and LT are registered trademarks of Linear Technology Corporation. s s s s Wireless Infrastructure Cable Downlink Infrastructure Point-to-Point Data munications High Linearity Frequency Conversion TYPICAL APPLICATIO 5VDC 1µF 1000p F 39n H EN BPF IF INPUT 4:1 IF + 15p F IF - 220p F 100Ω RF - BPF PA RF OUTPUT RF + 100Ω BIAS VCC1 VCC2 VCC3 POUT, IM3 (d Bm/TONE) 220p F 10p F GND 5p F (OPTIONAL) LO INPUT - 5d Bm LO+ 85Ω 5p F LO - LT5520 5520 F01 Figure 1. Frequency Conversion in Wireless Infrastructure Transmitter 5520f RF Output Power and Output IM3 vs IF Input Power (Two Input Tones) 10 0 - 10 -...