DESCRIPTION
The LT®5528 is a direct I/Q modulator designed for high performance wireless applications, including wireless infrastructure. It allows direct modulation of an RF signal using differential baseband I and Q signals. It supports PHS, GSM, EDGE, TD-SCDMA, CDMA, CDMA2000, W-CDMA and other systems.

FEATURES
■ Direct Conversion to 1.5GHz to 2.4GHz
■ High OIP3: 21.8dBm at 2GHz
■ Low Output Noise Floor at 5MHz Offset:
   No RF: –159.3dBm/Hz
   POUT = 4dBm: –151.8dBm/Hz
■ 4-Ch W-CDMA ACPR: –66dBc at 2.14GHz
■ Integrated LO Buffer and LO Quadrature Phase Generator
■ 50Ω AC-Coupled Single-Ended LO and RF Ports
■ 50Ω DC Interface to Baseband Inputs
■ Low Carrier Leakage: –42dBm at 2GHz
■ High Image Rejection: 45dB at 2GHz
■ 16-Lead QFN 4mm × 4mm Package

APPLICATIONS
■ Infrastructure Tx for DCS, PCS and UMTS Bands
■ Image Reject Up-Converters for PCS and UMTS Bands
■ Low-Noise Variable Phase-Shifter for 1.5GHz to 2.4GHz Local Oscillator Signals