ADA-4543

ADA-4543 Silicon Bipolar Darlington Amplifier Data Sheet Description Avago Technologies’ ADA-4543 is an economical, easy-touse, general purpose silicon bipolar RFIC gain block amplifiers 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 amplification. ADA-4543 is fabricated using Avago’s HP25 silicon bipolar process, which employs a double-diffused 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 6V BVCEO). The process utilizes industry standard device oxide isolation technologies and submicron aluminum multilayer interconnect to achieve superior performance, high uniformity, and proven reliability. Surface Mount Package SOT-343 Features Small Signal gain amplifier Operating frequency DC – 2.5 GHz Unconditionally stable 50 Ohms input & output Flat, Broadband Frequency Response up to 1 GHz Operating Current: 10 to 30 mA Industry standard SOT-343 package Lead-free option available Specifications 900 MHz, 3.4V, 15 mA (typ.) 15.1 dB associated gain 1.9 dBm P1dB 15 dBm OIP3 3.7 dB noise figure VSWR < 2 throughput operating frequency Single supply, typical Id = 15 mA Applicati...