LT5527EUF LT5527 - 400MHz to 3.7GHz High Signal Level Downconverting Mixer

Features and Benefits

• 50? Single-Ended RF and LO Ports
• Wide RF Frequency Range: 400MHz to 3.7GHz*
• High Input IP3:
• 24.5dBm at 900MHz
• 23.5dBm at 1900MHz
• Conversion Gain:
• 3.2dB at 900MHz
• 2.3dB at 1900MHz
• Integrated LO Buffer: Low LO Drive Level
• High LO-RF and LO-IF Isolation
• Low Noise Figure:
• 11.6dB at 900MHz
• 12.5dB at 1900MHz
• Very Few External Components
• Enable Function
• 4.5V to 5.25V Supply Voltage Range
• 16-Lead (4mm × 4mm) QFN Package

Product details

The LT5527 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 50? interfaces. The differential IF output allows convenient interfacing to differential IF filters and amplifiers, or is easily matched to drive 50? single-ended, with or without an external transformer.

The RF input is internally matched to 50? from 1.7GHz to 3GHz, and the LO input is internally matched to 50? from1.2GHz 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 LT5527's high level of integration minimizes the total solution cost, board space and system-level variation.

Applications

• Cellular, WCDMA, TD-SCDMA and UMTS Infrastructure
• GSM900/GSM1800/GSM1900 Infrastructure
• 900MHz/2.4GHz/3.5GHz WLAN
• MMDS, WiMAX
• High Linearity Downmixer Applications