Bipolar Darlingtons in a low thermal resistant SOT-89 package
Avago Technologies has announced its ADA-4789, a cost-efficient, high linearity silicon bipolar Darlington amplifier in a low thermal resistant SOT-89 package for use up to 2.5GHz. The ADA-4789's unconditional stability and broad bandwidth performance make it ideal for IF amplifier and pre-driver amplifier applications in cellular base stations, as well as IF amplifiers in direct broadcast satellite and cable television infrastructures. Additionally, the internal 50-ohms matching circuitry simplifies design and provides shorter time-to-market.
The ADA-4789 is the latest addition to Avago's proven family of silicon bipolar Darlington amplifiers. With a power budget of 3.8 V/60 mA, the ADA-4789 delivers 32.6 dBm of OIP3 (Linearity), 17.1 dBm of output power, 16.5 dB of gain and 4.2 dB of noise figure at 900 MHz; at 2Ghz it provides 28.8 dBm of OIP3, 16.2 dBm of output power and 4.4 dB of noise figure. For a higher power budget of 4.1 V/80 mA, the ADA-4789 is able to boost the performance to 33.2 dBm of OIP3, 18.8 dBm of output power, 16.9 dB of gain and 4.2 dB of noise figure at 900 MHz.
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