LT5558

LAST TIME BUY

600MHz to 1100MHz High Linearity Direct Quadrature Modulator

Part Models: 1
1ku List Price: price unavailable

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Overview

Direct Conversion from Baseband to RF
High OIP3: + 22.4dBm at 900MHz
Low Output Noise Floor at 20MHz Offset:
- No RF: –158dBm/Hz
- P_OUT = 4dBm: –152.7dBm/Hz
Low Carrier Leakage: –43.7dBm at 900MHz
High Image Rejection: –49dBc at 900MHz
3 Channel CDMA2000 ACPR: –70.4dBc at 900MHz
Integrated LO Buffer and LO Quadrature Phase Generator
50Ω AC-Coupled Single-ended LO and RF Ports
High Impedance Interface to Baseband Inputs with 2.1V Common Mode Voltage
16-Lead QFN 4mm × 4mm Package

The LT5558 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 GSM, EDGE, CDMA, CDMA2000, and other systems. It may also be conﬁ gured as an image reject upconverting mixer, by applying 90° phase-shifted signals to the I and Q inputs. The high impedance I/Q baseband inputs consist of voltage-to-current converters that in turn drive doublebalanced mixers. The outputs of these mixers are summed and applied to an on-chip RF transformer, which converts the differential mixer signals to a 50Ω single-ended output. The balanced I and Q baseband input ports are intended for DC coupling from a source with a common-mode voltage level of about 2.1V. The LO path consists of an LO buffer with single-ended input, and precision quadrature generators which produce the LO drive for the mixers. The supply voltage range is 4.5V to 5.25V.

Applications

RFID Single-Sideband Transmitters
Infrastructure TX for Cellular and ISM Bands
Image Reject Up-Converters for Cellular Bands
Low-Noise Variable Phase-Shifter for 600MHz to 1100MHz Local Oscillator Signals
Microwave Links

Part Models: 1
1ku List Price: price unavailable

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LT5558EUF#PBF	16-Lead QFN (4mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jul 28, 2022 - 22_0058 Obsolescence of Generics LT5500/LT5511/LT5515/LT5518/LT5528/LT5558/LT5571/LTC5544
		PDN22_0058_Form Material_Report
LT5558EUF#PBF	Obsolete	PDN22_0058_Form Material_Report

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Phase-Locked Loop (PLL) Synthesizers 1
LTC6948	LAST TIME BUY	Ultralow Noise 0.37GHz to 6.39GHz Fractional-N Synthesizer with Integrated VCO

Parts	Product Life Cycle	Description
LTC5599	PRODUCTION	30MHz to 1300MHz Low Power Direct Quadrature Modulator

Tools & Simulations

ADIsimRF

ADIsimRF is an easy-to-use RF signal chain calculator. Cascaded gain, noise, distortion and power consumption can be calculated, plotted and exported for signal chains with up to 50 stages. ADIsimRF also includes an extensive data base of device models for ADI’s RF and mixed signal components.

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