DatasheetsPDF.com

LT5571

Linear Technology
Part Number LT5571
Manufacturer Linear Technology
Description 620MHz - 1100MHz High Linearity Direct Quadrature Modulator
Published Aug 29, 2009
Detailed Description www.DataSheet4U.com FEATURES ■ ■ ■ ■ LT5571 620MHz – 1100MHz High Linearity Direct Quadrature Modulator DESCRIPTION Th...
Datasheet PDF File LT5571 PDF File

LT5571
LT5571


Overview
www.
DataSheet4U.
com FEATURES ■ ■ ■ ■ LT5571 620MHz – 1100MHz High Linearity Direct Quadrature Modulator DESCRIPTION The LT®5571 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 RFID, GSM, EDGE, CDMA, CDMA2000, 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 high impedance 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 an on-chip RF transformer, which converts the differential mixer signals to a 50Ω singleended output.
The four balanced I and Q baseband input ports are intended for DC-coupling from a source with a common-mode voltage at about 0.
5V.
The LO path consists of an LO buffer with single-ended input, and precision quadrature generators that produce the LO drive for the mixers.
The supply voltage range is 4.
5V to 5.
25V.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
■ ■ ■ ■ ■ ■ ■ Direct Conversion from Baseband to RF High Output: –4.
2dB Conversion Gain High OIP3: 21.
7dBm at 900MHz Low Output Noise Floor at 20MHz Offset: No RF: –159dBm/Hz POUT = 4dBm: –153.
3dBm/Hz Low Carrier Leakage: –42dBm at 900MHz High Image Rejection: –53dBc at 900MHz 3-Ch 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 DC Interface to Baseband Inputs with 0.
5V Common Mode Voltage 16-Lead QFN 4mm × 4mm Package APPLICATIONS ■ ■ ■ ■ ■ RFID Interrogators GSM, CDMA, CDMA2000 Transmitters Point-to-Point Wireless Infrastructure Tx Image Reject Up-Converters for Cellular Bands Low-Noise Variable Phase-Shifter for 620MHz to 11...


Similar Datasheet


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site. (Privacy Policy & Contact)