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15dB RF/IF amplifier claims high dynamic range

Posted: 31 Jan 2013     Print Version  Bookmark and Share

Keywords:RF/IF  amplifier  differential 

Linear Technology unveils the LTC6430-15, a 15dB amplifier, which achieves high dynamic range in a 100Ω differential environment from 20MHz to 1GHz and beyond.


Two performance grades are available: at 240MHz, the A-grade OIP3 is typically 50dBm and is fully tested and guaranteed to be a minimum of 47dBm; while the B-grade OIP3 is typically 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 100Ω differential. With greater than 2.75Vp-p Linear output swing, it is well suited for driving high speed, high performance ADCs, according to the company. Two 1:2 baluns, DC blocking capacitors, and RF bias chokes are all that is needed externally to achieve a wideband 50Ω balanced amplifier in communications applications. With two 1:1.33 baluns, the LTC6430-15 can be used as a high fidelity 75Ω 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.

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