LTC5540 - 600MHz to 1.3GHz High Dynamic Range Downconverting Mixer

The LTC5540 is part of a family of high dynamic range, high gain passive downconverting mixers covering the 600MHz to 4GHz frequency range. The LTC5540 is optimized for 0.6GHz to 1.3GHz RF applications. The LO frequency must fall within the 0.7GHz to 1.2GHz range for optimum performance. A typical application is a LTE or GSM receiver with a 700MHz to 915MHz RF input and high-side LO.

The LTC5540 is designed for 3.3V operation, however; the IF amplifier can be powered by 5V for the highest P1dB. An integrated SPDT LO switch with fast switching accepts two active LO signals, while providing high isolation.

The LTC5540’s high conversion gain and high dynamic range enable the use of lossy IF filters in high-selectivity receiver designs, while minimizing the total solution cost, board space and system-level variation.

  • Conversion Gain: 7.9dB at 900MHz
  • IIP3: 25.9dBm at 900MHz
  • Noise Figure: 9.9dB at 900MHz
  • 16.2dB NF Under +5dBm Blocking
  • High Input P1dB
  • 3.3V Supply, 640mW Power Consumption
  • Shutdown Pin
  • 50Ω Single-Ended RF and LO Inputs
  • LO Inputs 50Ω Matched when Shutdown
  • High Isolation LO Switch
  • 0dBm LO Drive Level
  • High LO-RF and LO-IF Isolation
  • Small Solution Size
  • 20-Lead (5mm × 5mm) QFN package
Typical Application
LTC5540 Typical Application
LTC5540 Typical Application
  • Wireless Infrastructure Receivers (LTE, GSM, W-CDMA)
  • Point-to-Point Microwave links
  • High Dynamic Range Downmixer Applications
LTC5540 Package Drawing
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LTC5540IUH#PBF5x5 QFN-20I$9.25$6.50
LTC5540IUH#TRPBF5x5 QFN-20I$6.55
Demo Boards
Part NumberDescriptionPrice
DC1431A-ALTC5540IUH Demo Board | Optimized forRF=600MHz to 1.3GHz, LO=700MHz to 1.2GHz$125.00
Reliability Data
LT Journal
CAD Symbol
Related Products
LTC5540 - 0.6GHz to 1.3GHz High Dynamic Range Downconverting Mixer
R550 - Reliability Data
Passive Mixers Increase Gain and Decrease Noise When Compared to Active Mixers in Downconverter Applications
LTC5540 Footprints and Symbols