DESCRIPTION
Electrical performance is nominally identical to the original parts. The SA5205A operates with a single supply of 6V, and only draws 24mA of supply current, which is much less than comparable hybrid parts. The noise figure is 4.8dB in a 75Ω system and 6dB in a 50Ω system. Until now, most RF or high-frequency designers had to settle for discrete or hybrid solutions to their amplification problems. Most of these solutions required trade-offs that the designer had to accept in order to use high-frequency gain stages. These include high-power consumption, large component count, transformers, large packages with heat sinks, and high part cost. The SA5205A solves these problems by incorporating a wide-band amplifier on a single monolithic chip. The part is well matched to 50 or 75Ω input and output impedances. The Standing Wave Ratios in 50 and 75Ω systems do not exceed 1.5 on either the input or output from DC to the -3dB bandwidth limit. Since the part is a small monolithic IC die, problems such as stray capacitance are minimized.
Philips
