Integrated Device Technology has introduced a digital variable gain amplifier (VGA) for radio frequency (RF) base stations featuring its new KLIN constant linearity technology at the International Microwave Symposium (IMS) 2016. With this KLIN innovation, their F1455 family of high-gain, high-linearity transmitter VGAs maintains a high 38 dBm output third order intercept point (OIP3) for the first 12 dB of gain control range, providing a greater dynamic range for the system. This F1455 family of devices is ideally suited to drive power amplifiers in wireless base station transmitters.
IDT's KLIN technology extends both OIP3 and output 1 dB compression point in amplifiers. This is particularly valuable in transmitter designs where the gain of the device is maintained within a normal gain setting window about 6 dB below maximum gain.
The features of the F1455 include:
- Broadband 1400 MHz to 2300 MHz operation
- 32 dB flat, temperature invariant max gain
- 4 dB NF @ max gain (2000 MHz)
- 23 dBm P1dBO (constant for first 12 dB of gain reduction)
- 38 dBm OIP3 (constant for 12 dB gain reduction)
- 29.5 dB total gain control range, 0.5 dB step
- SPI interface for gain control
- All internal matching and biasing
- High reliability MSL1 package with low thermal resistance
- Single 5 V supply voltage
It is available in a 6 x 6 mm 28-QFN package, and is sampling now to customers.
