ADL6317 Transmit Variable Gain Amplifier Analog Devices ADL6317 Transmit Variable Gain Amplifier provides an interface from radio frequency digital-to-analog converters, transceivers, and systems on a chip (SoC) to power amplifiers. The device is ideal for 2G/3G/4G/long-term evolution (LTE) in FDD/TDD broadband communication systems. The ADL6317 VGA features integrated balun and hybrid couplers that allow high-performance RF capability in the 1500MHz to 3000MHz frequency range. The device includes a voltage variable attenuator (VVA), high linearity amplifiers, and a digital step attenuator (DSA) to optimize performance-vs.-power level.