Wideband 2GHz to 14GHz Mixer with Integrated LO Frequency Doubler Offers Outstanding IIP3 of 24.4dBm

Linear Technology LTC5549

Linear Technology announces the LTC5549, a double-balanced mixer that can operate either as an upconverter or downconverter, with a very wide RF frequency range from 2 GHz to 14 GHz. The LTC5549 offers exceptionally high linearity of 24.4 dBm IIP3 at 9 GHz. The LTC5549 enables efficient microwave transmitter and receiver designs with an integrated LO buffer that needs only a 0 dBm drive level, effectively eliminating an external high power LO amplifier circuit. Moreover, the LTC5549 has an integrated on-chip, switchable frequency doubler for LO signal, providing an option to use lower cost, commonly available low frequency synthesizers. The LTC5549 employs wideband integrated balun transformer optimized to extend RF frequency bandwidth from 2 GHz to 14 GHz while enabling single-ended operation. Its IF port also has wide bandwidth up to 6 GHz. All three ports are 50 Ω matched. The mixer offers high port-to-port isolation, minimizing undesireable LO leakage, and easing external filtering requirements.

Linear Technology - LTC5549

The LTC5549’s performance enhances a wide range of microwave applications including microwave backhaul, high unlicensed band LTE-Advanced base stations, satellite broadband radios, radar systems, X-band and Ku band transceivers, test equipment and satellite modems.

Conversion Loss and IIP3
Conversion Loss and IIP3. (Low Side LO, IF = 1890MHz).

The LTC5549 offers improved ESD protection with its 2,000 V ESD human body model (HBM) rating on all pins. The device is available in a tiny 12 lead, 3 mm × 2 mm plastic QFN package. With its minimal external component design, the LTC5549 results in a compact solution footprint. The device is rated for operation from –40 °C to 105 °C case temperature to support extended environmental operating temperature. The mixer is optimized for single 3.3 V supply operation, drawing a nominal supply current of 115 mA. Additionally, the LTC5549 has an enable pin to disable the IC. When deactivated, the device draws only 100 μA maximum standby current. The enable pin can be driven directly to turn the device on and off rapidly in less than 0.2 μs, supporting time-division duplex (TDD) or burst mode type radios. The LTC5549 is priced starting at $9.50 each in 1,000-piece quantities. Samples and production quantities are available immediately.

Summary of Features: LTC5549

  • Operating RF Frequency 2 GHz to 14 GHz
  • Upconversion or Downconversion
  • IF Frequency Range 0.5 GHz to 6 GHz
  • High Input IIP3 24.4 dBm
  • Low Conversion Loss 8.0 dB
  • Low LO Drive Level 0 dBm
You may have to register before you can post comments and get full access to forum.
EMS supplier