Digital variable gain amplifier targets RF base stations
Integrated Device Technology has introduced a digital Variable Gain Amplifier (VGA) for RF base stations featuring its new KLIN constant linearity technology. With the KLIN innovation, the IDT F1455 family of high-gain, high-linearity transmitter VGAs maintains a high 38dBm output third order intercept point for the first 12dB of gain control range, providing greater dynamic range for the system.
The F1455 family of devices is suited to drive power amplifiers in wireless base station transmitters. Other soon-to-be-released parts in the family cover frequency ranges of 700 to 1100 and 2300 to 3000MHz.
IDT’s KLIN technology extends both OIP3 and output 1dB compression point (P1dBO) amplifier gain settings. This is particularly valuable in transmitter designs where the gain of the device is maintained within a normal gain setting window about 6dB below maximum gain.
Chris Stephens, General Manager, RF division, IDT, commented: “The F1455 family provides high-reliability, monolithic, QFN-packaged silicon solutions that deliver unique constant high linearity via our new KLIN innovation. These ICs, which replace lower-reliability GaAs-based MCMs, continue IDT’s trend of bringing innovative design technology to the markets we serve.”
The F1455 is available in a 6x6mm 28-QFN package and is sampling now to customers.