View bga2031 3 datasheet:

DISCRETE SEMICONDUCTORS DATA SHEET M3D452 BGA2031 MMIC variable gain amplifier Preliminary specification 1999 Jul 23 Supersedes data of 1999 Feb 26 Philips Semiconductors Preliminary specification MMIC variable gain amplifier BGA2031 FEATURES PINNING � High gain PIN DESCRIPTION � Excellent adjacent channel power rejection 1 RF in � Small SMD package 2 CTRL � Low dissipation. 3 VS1 4 VS2 + RF out APPLICATIONS 5 GND � General purpose variable gain amplifier for low voltage and medium power handbook, halfpage VS1 � Driver for power amplifiers in systems that require good 54 linearity, such as CDMA, both cellular band (850 MHz) RFin VS2+RFout and PCS (1.9 GHz). This is because of the high output power and good linearity. GND CTRL 1 2 3 BIAS DESCRIPTION CIRCU