LT5575 - 800MHz to 2.7GHz High Linearity Direct Conversion Quadrature Demodulator

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 fi ltering 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.

Features
  • 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
Typical Application
LT5575 Typical Application
LT5575 Typical Application
Applications
  • Cellular/PCS/UMTS Infrastructure
  • RFID Reader
  • High Linearity Direct Conversion I/Q Receiver
Packaging
LT5575 Package Drawing
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LT5575EUF#PBF4x4 QFN-16E$11.04$7.75
LT5575EUF#TRPBF4x4 QFN-16E$7.80
Demo Boards
Part NumberDescriptionPrice
DC1048ALT5575EUF | 800MHz to 2.7GHz Direct I/Q Demodulator$150.00
Datasheet
Design Note
Reliability Data
LT Journal
Press Release
CAD Symbol
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LT5575 Footprints and Symbols