0.38 GHz to 15 GHz TxVGA

The ADL6331 transmit variable gain amplifier (TxVGA) provides an interface from RF digital-to-analog converters (RF DACs) to a singled-ended power amplifier (PA) signal chain. Each ADL6331 IC is composed of a balun, two differential RF amplifiers with bypass attenuators, and a digital step attenuator (DSA) to provide suitable transmitter performance in a 24-terminal, 4.0 mm x 4.0 mm LGA package.

Serial-port interface (SPI) control is available to configure RF signal paths or to optimize supply current vs. performance.

An integrated RF balun is used to provide a single-ended output over 0.38 GHz to 8.0 GHz (ADL6331-A) or 1.0 GHz to 15.0 GHz (ADL6331-B) with good impedance match.

Applications

* Aerospace and defense

* Instrumentation and test equipment

* Communication systems

* Broadband TxVGA interfacing RF-DAC to beamformer and PA* Operating frequency range: 0.38 GHz to 15 GHz, 2 product variants

* ADL6331-A: 0.38 GHz to 8.0 GHz* ADL6331-B: 1.0 GHz to 15.0 GHz * Optimizes common-mode rejection of RF-DAC, even-order harmonics, and intermodulation* 50 Ω differential inputs and 50 Ω single-ended outputs* Integrated broadband RF output balun* 70 dB of gain control range in 1 dB step* RF DSA range: 24.0 dB with 1.0 dB step* Amplifier bypass loss of 12 dB each* Asynchronous toggle between multiple pre-defined attenuation values and bypass amplifier stages.