基于TQC9312下的3.3 – 3.8 GHz ½ W Digital Variable Gain Amplifier

　　Applications

　　 3G / 4G Wireless Infrastructure

　　 Repeaters  Small cells

　　General Description

　　The TQC9312 is a digital variable gain amplifier （DVGA） featuring high linearity over the entire gain control range. This amplifier module integrates two gain blocks， a digital-step attenuator （DSA）， and a high linearity ½ W amplifier.

　　The module has the added feature of integrating all matching components， bias chokes and blocking capacitors. The internal 6-bit DSA provides a 31.5 dB gain control range in 0.5 dB steps， and is controlled with a serial periphery interface （SPITM）。 The TQC9312 features variable gain from 9 dB to 40dB at 3.5 GHz， +44.5 dBm output IP3， and +27.8 dBm P1dB. The module operates from a single +5V supply and is available in a compact 28-pin 6x6 mm leadless SMT package.

　　The TQC9312 is pin compatible with the TQM879008 （1.5-2.7GHz， 0.5W P1dB） and TQM879006A （1.4- 2.7GHz， 0.25W P1dB）。 This allows one to size the right type of device for specific system level requirements as well as making the DVGA family ideal for applications where a common PCB layout is used for different frequency bands.