LT5557 Datasheet | Linear Technology

LT5557 400MHz to 3.8GHz 3.3V Active Downconverting Mixer Features n Wide RF Frequency Range: 400MHz to 3.8GHz- n High Input IP3: 25.6d Bm at 900MHz 24.7d Bm at 1950MHz 23.7d Bm at 2.6GHz n Conversion Gain: 3.3d B at 900MHz 2.9d B at 1950MHz n - 3d Bm LO Drive Level n Low LO Leakage n Low Noise Figure:10.6d B at 900MHz 11.7d B at 1950MHz n Low Power: 3.3V/269m W n50Ω Single-Ended RF and LO Ports n Very Few External ponents n 16-Lead (4mm × 4mm) QFN Package Applications n Cellular, CDMA, WCDMA, TD-SCDMA and UMTS Infrastructure n Wi MAX n Wireless Infrastructure Receiver n Wireless Infrastructure PA Linearization n 900MHz/2.4GHz/3.5GHz WLAN Description The LT®5557 active mixer is optimized for high linearity, wide dynamic range downconverter applications. The IC includes a high speed differential LO buffer amplifier driving a double-balanced mixer. Broadband, integrated transformers on the RF and LO inputs provide single-ended 50Ω interfaces. The differential IF output allows convenient interfacing to differential IF filters and amplifiers, or is easily matched to drive a single-ended 50Ω load, with or without an external transformer. The RF input is internally matched to 50Ω from 1.6GHz to 2.3GHz, and the LO input is internally matched to 50Ω from 1GHz to 5GHz. The frequency range of both ports is easily extended with simple external matching. The IF output is partially matched and usable for IF frequencies up to 600MHz. The LT5557’s high level of integration minimizes the total solution cost, board space and system-level variation. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.- Operation over a wider frequency range is possible with reduced performance. Consult factory for information and assistance. Typical Application High Signal Level Downmixer for Multi-Carrier Wireless Infrastructure LO INPUT - 3d...