LT5575 Datasheet | Linear Technology

.. 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 munications 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: 28d Bm at 900MHz, 22.6d Bm at 1.9GHz High IIP2: 54.1d Bm at 900MHz, 60d Bm at 1.9GHz Input P1d B: 13.2d Bm at 900MHz I/Q Gain Mismatch: 0.04d B Typical I/Q Phase Mismatch: 0.4° Typical Low Output DC Offsets Noise Figure: 12.8d B at 900MHz, 12.7d B at 1.9GHz Conversion Gain: 3d B at 900MHz, 4.2d B at 1.9GHz Very Few External ponents Shutdown Mode 16-Lead QFN 4mm × 4mm Package with Exposed Pad APPLICATIONS - - - Cellular/PCS/UMTS Infrastructure RFID Reader High Linearity...