The LTC6430-15 from Linear Technology is a 15 dB amplifier which achieves high dynamic range in a 100 Ω differential environment from 20 MHz to 1 GHz and beyond. Two performance grades are available; at 240 MHz, the A-grade OIP3 is typically 50 dBm and is fully tested and guaranteed to be a minimum of 47 dBm.
Noise figure is 3 dB, which corresponds to an input-referred amplifier noise of 1 nV/√Hz. DC power consumption is 800 mW. This combination of low noise and low distortion provides the wide dynamic range needed for high-performance intermediate frequency communications and CATV applications.
The LTC6430-15 is unconditionally stable, and the input and output are internally matched to 100 Ω differential. With greater than 2,75 VP-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 are needed externally to achieve a wideband 50 Ω balanced amplifier in communications applications.
With two 1:1,33 baluns, the LTC6430-15 can be used as a high-fidelity 75 Ω CATV amplifier. P1dB is typically 24 dBm. The IC is available in a 4 x 4 mm QFN-24 package with exposed pad for best thermal performance and low inductance.
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