■ Internal On-Chip RF Input Transformer

■ 50Ω Single-Ended RF and LO Ports

■ High Input IP3: +25dBm at 900MHz +21.5dBm at 1900MHz

■ Low Power Consumption: 280mW Typical

■ Integrated LO Buffer: Low LO Drive Level

■ High LO-RF and LO-IF Isolation

■ Wide RF Frequency Range: 0.4GHz to 2.7GHz*

■ Very Few External Components

■ Enable Function

■ 4.5V to 5.25V Supply Voltage Range

■ 16-Lead (4mm × 4mm) QFN Package

APPLICATION

■ Cellular, PCS and UMTS Band Infrastructure

■ CATV Downlink Infrastructure

■ 2.4GHz ISM

■ High Linearity Downmixer Applications

DESCRIPTION

The LT® 5522 active downconverting mixer is optimized for high linearity downconverter applications including cable and wireless infrastructure.

The IC includes a high speed differential LO buffer amplifier driving a double-balanced mixer. The LO buffer is internally matched for wideband, single-ended operation with no external components.

The RF input port incorporates an integrated RF transformer and is internally matched over the 1.2GHz to 2.3GHz frequency range with no external components.

The RF input match can be shifted down to 400MHz, or up to 2.7GHz, with a single shunt capacitor or inductor, respectively. The high level of integration minimizes the total solution cost, board space and system-level variation.

The LT5522 delivers high performance and small size without excessive power consumption.

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