DESCRIPTION
The SA5209 represents a breakthrough in monolithic amplifier design featuring several innovations. This unique design has combined the advantages of a high speed bipolar process with the proven Gilbert architecture.
The SA5209 is a linear broadband RF amplifier whose gain is controlled by a single DC voltage. The amplifier runs off a single 5 volt supply and consumes only 40mA. The amplifier has high impedance (1kΩ) differential inputs. The output is 50Ω differential. Therefore, the 5209 can simultaneously perform AGC, impedance transformation, and the balun functions.
The dynamic range is excellent over a wide range of gain setting.
Furthermore, the noise performance degrades at a comparatively slow rate as the gain is reduced. This is an important feature when building linear AGC systems.

FEATURES
• Gain to 1.5GHz
• 850MHz bandwidth
• High impedance differential input
• 50Ω differential output
• Single 5V power supply
• 0 - 1V gain control pin
• >60dB gain control range at 200MHz
• 26dB maximum gain differential
• Exceptional VCONTROL / VGAIN linearity
• 7dB noise figure minimum
• Full ESD protection
• Easily cascadable

APPLICATIONS
• Linear AGC systems
• Very linear AM modulator
• RF balun
• Cable TV multi-purpose amplifier
• Fiber optic AGC
• RADAR
• User programmable fixed gain block
• Video
• Satellite receivers
• Cellular communications