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LT5575

Linear Technology
Part Number LT5575
Manufacturer Linear Technology
Published Aug 29, 2009
Description 800MHz to 2.7GHz High Linearity Direct Conversion Quadrature Demodulator
Detailed Description www.DataSheet4U.com FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ LT5575 800MHz to 2.7GHz High Linearity Direct Conversion Quadra...
Datasheet PDF File LT5575 PDF File

LT5575
LT5575


Overview
www.
DataSheet4U.
com FEATURES ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ LT5575 800MHz to 2.
7GHz High Linearity Direct Conversion Quadrature Demodulator DESCRIPTION The LT®5575 is an 800MHz to 2.
7GHz direct conversion quadrature demodulator optimized for high linearity receiver applications.
It is suitable for communications receivers where an RF signal is directly converted into I and Q baseband signals with bandwidth up to 490MHz.
The LT5575 incorporates balanced I and Q mixers, LO buffer amplifiers and a precision, high frequency quadrature phase shifter.
The integrated on-chip broadband transformers provide 50Ω single-ended interfaces at the RF and LO inputs.
Only a few external capacitors are needed for its application in an RF receiver system.
The high linearity of the LT5575 provides excellent spurfree dynamic range for the receiver.
This direct conversion demodulator can eliminate the need for intermediate frequency (IF) signal processing, as well as the corresponding requirements for image filtering and IF filtering.
Channel filtering can be performed directly at the outputs of the I and Q channels.
These outputs can interface directly to channel-select filters (LPFs) or to baseband amplifiers.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
*Operation over a wider frequency range is possible with reduced performance.
Consult the factory.
Input Frequency Range: 0.
8GHz to 2.
7GHz* 50Ω Single-Ended RF and LO Ports High IIP3: 28dBm at 900MHz, 22.
6dBm at 1.
9GHz High IIP2: 54.
1dBm at 900MHz, 60dBm at 1.
9GHz Input P1dB: 13.
2dBm at 900MHz I/Q Gain Mismatch: 0.
04dB Typical I/Q Phase Mismatch: 0.
4° Typical Low Output DC Offsets Noise Figure: 12.
8dB at 900MHz, 12.
7dB at 1.
9GHz Conversion Gain: 3dB at 900MHz, 4.
2dB at 1.
9GHz Very Few External Components Shutdown Mode 16-Lead QFN 4mm × 4mm Package with Exposed Pad APPLICATIONS ■ ■ ■ Cellular/PCS/UMTS Infrastructure RFID Reader High Linearity Di...


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