LTC5598 Datasheet | Linear Technology

Features n n n LTC5598 5MHz to 1600MHz High Linearity Direct Quadrature Modulator 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. The I/Q baseband inputs consist of voltage-to-current converters that in turn drive double-balanced mixers. The outputs of these mixers are summed and applied to a buffer, which converts the differential mixer signals to a 50Ω single-ended buffered RF output. The four balanced I and Q baseband input ports are intended for DC coupling from a source with a mon-mode voltage level of about 0.5V. The LO path consists of an LO buffer with single-ended or differential inputs, and precision quadrature generators that produce the LO drive for the mixers. The supply voltage range is 4.5V to 5.25V, with about 168m A current. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. n n n n n n n n Frequency Range: 5MHz to 1600MHz High Output IP3: +27.7d Bm at 140MHz +22.9d Bm at 900MHz Low Output Noise Floor at 6MHz Offset: No Baseband AC Input: - 161.2d Bm/Hz POUT = 5.5d Bm: - 160d Bm/Hz Low LO Feedthrough: - 55d Bm at 140MHz High Image Rejection: - 50.4d Bc 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-patible with Industry Standard Pin-Out Shut-down Mode APPLICATIONS n n n n n n n Point-to-Point Microwave Link Military Radio Basestation Transmitter GSM/EDGE/CDMA2K 700MHz LTE Basestation Transmitter Satellite munication...