RF Amp Chip Single GP 2.5GHz 3.9V 4-Pin(3+Tab) SOT-343 T/R
Avago Technologies’ ADA-4643 is an economical, easy-touse, general purpose silicon bipolar RFIC gain block amplifi ers housed in a 4-lead SC-70 (SOT-343) surface mount plastic package which requires only half the board space of a SOT-143 package. The Darlington feedback structure provides inherent broad bandwidth performance, resulting in useful operating frequency up to 2.5 GHz. This is an ideal device for small-signal gain cascades or IF amplifi cation. ADA-4643 is fabricated using Avago’s HP25 silicon bipolar process, which employs a double-diff used single polysilicon process with self-aligned submicron emitter geometry. The process is capable of simultaneous high fT and high NPN breakdown (25 GHz fT at 6 V BVCEO). The process utilizes industry standard device oxide isolation technologies and submicron aluminum multilayer interconnect to achieve superior performance, high uniformity, and proven reliability.