LT5557

PRODUCTION

400MHz to 3.8GHz 3.3V High Linearity Downconverting RF Mixer

Part Models: 2
1ku List Price: Starting From $7.38

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Overview

Wide RF Frequency Range: 400MHz to 3.8GHz*
High Input IP3:
- 25.6dBm at 900MHz
- 24.7dBm at 1950MHz
- 23.7dBm at 2.6GHz
Conversion Gain:
- 3.3dB at 900MHz
- 2.9dB at 1950MHz
–3dBm LO Drive Level
Low LO Leakage
Low Noise Figure:
- 10.6dB at 900MHz
- 11.7dB at 1950MHz
Low Power: 3.3V/269mW
50Ω Single-Ended RF and LO Ports
Very Few External Components
16-Lead (4mm × 4mm) QFN Package

The LT5557 active mixer is optimized for high linearity, wide dynamic range downconverter applications. The IC includes a high speed differential LO buffer amplifier driving a double-balanced mixer. Broadband, integrated transformers on the RF and LO inputs provide single-ended 50Ω interfaces. The differential IF output allows convenient interfacing to differential IF filters and amplifiers, or is easily matched to drive a single-ended 50Ω load, with or without an external transformer.

The RF input is internally matched to 50Ω from 1.6GHz to 2.3GHz, and the LO input is internally matched to 50Ω from 1GHz to 5GHz. The frequency range of both ports is easily extended with simple external matching. The IF output is partially matched and usable for IF frequencies up to 600MHz.

The LT5557’s high level of integration minimizes the total solution cost, board space and system-level variation.

Applications

Cellular, CDMA, WCDMA, TD-SCDMA and UMTS Infrastructure
WiMAX
Wireless Infrastructure Receiver
Wireless Infrastructure PA Linearization
900MHz/2.4GHz/3.5GHz WLAN

Part Models: 2
1ku List Price: Starting From $7.38

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
LT5557EUF#PBF	16-Lead QFN (4mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT5557EUF#TRPBF	16-Lead QFN (4mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

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
Analog to Digital Converters (ADCs) 1
LTC2262-14	PRODUCTION	14-Bit, 150Msps Ultralow Power 1.8V ADC
Low-Noise Amplifiers (LNAs) & Power Amplifiers 1
LTC6430-20	RECOMMENDED FOR NEW DESIGNS	High Linearity Differential RF/IF Amplifier/ADC Driver
Phase-Locked Loop (PLL) Synthesizers 1
LTC6948	LAST TIME BUY	Ultralow Noise 0.37GHz to 6.39GHz Fractional-N Synthesizer with Integrated VCO
RF Mixers 1
LTC5567	PRODUCTION	300MHz to 4GHz Active Downconverting Mixer with Wideband IF

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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