TQ7621

The TQ7621 is designed as one kind of 3V pcs TDMA power amplifier ic,it is produced  by the Triquint Semiconductor,inc.The TQ7621 is a high-efficiency power amplifier developed for pcs-1900 handsets operating at the 1850 to 1910 MHz uplink band.The unit provides high-efficicy amplification of GMSK modulated signals with a saturated output power of greater than 32 dBm.It is designed for operation from a 3.4-volt nominal supply and requires no externally applied negative voltage.The TQ7621 is packaged in a small,low-cost power TSSOP-20 plastic package.The TQ7621 is designed to require minimal external circuitry for matching and bias,simplifying design and keeping board space and cost to a minimum.Power output control is implementer using the suggested application circuit.

Features of the TQ7621 are:(1)3V,single supply;(2)high efficiency;(3)32 dBm output power;(4)low harmonics;(5)power TSSOP-20 plastic package;(6)50-ohm matched input.It can be used in PCS-1900 mobile phones.The absolute maximum ratings of the TQ7641 are:(1)DC power supply:6.0 V;(2)Vtx:3.6 V;(3)PAon:3.6 V;(4)RF input power:20 dBm;(5)storage temperature:-55 to 150 and (6)operating temperature(case):-30 to 125.