DESCRIPTION
The LTC®5598 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 point-to-point microwave link, GSM, EDGE, CDMA, 700MHz band LTE, CDMA2000, CATV applications and other systems. It may also be configured as an image reject upconverting mixer, by applying 90° phase-shifted signals to the I and Q inputs.

FEATURES
■ Frequency Range: 5MHz to 1600MHz
■ High Output IP3: +27.7dBm at 140MHz
                               +22.9dBm at 900MHz
■ Low Output Noise Floor at 6MHz Offset:
   No Baseband AC Input: –161.2dBm/Hz
   POUT = 5.5dBm: –160dBm/Hz
■ Low LO Feedthrough: –55dBm at 140MHz
■ High Image Rejection: –50.4dBc at 140MHz
■ Integrated LO Buffer and LO Quadrature Phase Generator
■ 50Ω Single-Ended LO and RF Ports
■ >400MHz Baseband Bandwidth
■ 24-Lead QFN 4mm × 4mm Package
■ Pin-Compatible with Industry Standard Pin-Out
■ Shut-down Mode

APPLICATIONS
■ Point-to-Point Microwave Link
■ Military Radio
■ Basestation Transmitter GSM/EDGE/CDMA2K
■ 700MHz LTE Basestation Transmitter
■ Satellite Communication
■ CATV/Cable Broadband Modulator
■ 13.56MHz/UHF RFID Modulator