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Industry News

Linear's fully differential IF 15 dB RF/IF amplifier achieves 50 dBm OIP3

January 28, 2013
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Linear Technology announces the LTC6430-15, a 15dB amplifier, which achieves high dynamic range in a 100 Ohm differential environment from 20 MHz to 1GHz and beyond. Two performance grades are available: at 240MHz, the A-grade OIP3 is typically 50 dBm and is fully tested and guaranteed to be a minimum of 47dBm. Noise Figure is 3dB, which corresponds to an input-referred amplifier noise of 1nV/√Hz. DC power consumption is 800mW. This combination of low noise and low distortion provides wide dynamic range needed for high performance intermediate frequency communications and CATV applications.

The LTC6430-15 is easy to use, it is unconditionally stable, and the input and output are internally matched to 100Ohm differential. With greater than 2.75VP-P linear output swing, it is well suited for driving high speed, high performance ADCs. Two 1:2 baluns, DC blocking capacitors, and RF bias chokes are all that is needed externally to achieve a wideband 50Ohm balanced amplifier in communications applications. With two 1:1.33 baluns, the LTC6430-15 can be used as a high fidelity 75Ohm CATV amplifier. P1dB is typically 24dBm.

The LTC6430-15 is available in a 4mm x 4mm QFN-24 package with exposed pad for best thermal performance and low inductance. It is specified for operation from -40°C to 85°C case temperature. Pricing starts at $6.44 each for the A-grade version and $3.69 each for the B-grade in 1,000-piece quantities. For more information, visit www.linear.com/product/LTC6430-15.

Summary of Features: LTC6430-15

  • 20 to 2000 MHz Bandwidth
  • 15.2 dB Power Gain
  • OIP3 at 240 MHz:
    • 50 dBm typ, 47 dBm min A-Grade
    • 47 dBm typ B-Grade
  • 3.0 dB NF at 240 MHz
  • >2.75 VP-P Linear Output Swing
  • 24 dBm P1dB
  • 100 Ohm Differential Gain-Block Operation
  • Single 5 V Supply, 160 mA
  • Unconditionally Stable
  • 4 x 4 mm 24-Lead QFN Package

 

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