DESCRIPTION
The LT®5517 is a 40MHz to 900MHz quadrature demodulator optimized for high linearity receiver applications where high dynamic range is important. It is suitable for communications receivers where an RF or IF signal is directly converted into I and Q baseband signals with a bandwidth up to 130MHz. The LT5517 incorporates balanced I and Q mixers, LO buffer amplifiers and a precision, broadband quadrature generator derived from an on-chip divide-by-two circuit.

FEATURES
■ RF Input Frequency Range: 40MHz to 900MHz
■ High IIP3: 21dBm at 800MHz
■ High IIP2: 58dBm at 800MHz
■ I/Q Gain Mismatch: 0.3dB Max
■ I/Q Phase Mismatch: 0.7°
■ Noise Figure: 12.4dB at 800MHz
■ Conversion Gain: 3.3dB at 800MHz
■ Baseband Bandwidth: 130MHz
■ Single Ended, 50Ω Matched 2XLO Input
■ Shutdown Mode
■ 16-Lead QFN (4mm × 4mm) Package with Exposed Pad

APPLICATIONS
■ Wireless Infrastructure
■ High Linearity Direct Conversion I/Q Receiver
■ High Linearity I/Q Demodulator