DESCRIPTION
The LT5572 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 from Baseband to RF
■ High Output: –2.5dB Conversion Gain
■ High OIP3: +21.6dBm at 2GHz
■ Low Output Noise Floor at 20MHz Offset:
   No RF: –158.6dBm/Hz
   POUT = 4dBm: –152.5dBm/Hz
■ Low Carrier Leakage: –39.4dBm at 2GHz
■ High Image Rejection: –41.2dBc at 2GHz
■ 4-Channel W-CDMA ACPR: –67.7dBc at 2.14GHz
■ Integrated LO Buffer and LO Quadrature Phase
   Generator
■ 50Ω AC-Coupled Single-Ended LO and RF Ports
■ High Impedance DC Interface to Baseband Inputs
   with 0.5V Common Mode Voltage
■ 16-Lead QFN 4mm × 4mm Package

APPLICATIONS
■ Infrastructure Tx for DCS, PCS and UMTS Bands
■ Image Reject Up-Converters for DCS, PCS and UMTS Bands
■ Low Noise Variable Phase Shifter for 1.5GHz to 2.5GHz Local Oscillator Signals