AD8347ARUZ-REEL7

AD8347 is a broadband direct quadrature demodulator with RF and baseband automatic gain control (AGC) amplifier. It is suitable for use in many communications receivers, performing quadrature demodulation directly to baseband frequencies. The input frequency range is 800MHz to 2.7GHz. The outputs can be connected directly to popular A-to-D converters such as the AD9201 and AD9283. The RF input signal goes through two stages of variable gain amplifiers prior to two Gilbert-cell mixers. The LO quadrature phase splitter employs polyphase filters to achieve high quadrature accuracy and amplitude balance over the entire operating frequency range. Separate I and Q channel variable gain amplifiers follow the baseband outputs of the mixers. The RF and baseband amplifiers together provide 69.5dB of gain control. It is used in application such as cellular base stations, radio links, wireless local loop, IF broadband demodulators, RF instrumentation, satellite modems etc.

• Quadrature phase accuracy is 1° typical
• I/Q amplitude balance 0.3dB typical
• Third-order intercept (IIP3) is +11.5dBm typical at (FRF1 = 1.905GHz)
• Noise figure is 11dB typical at (max gain)
• AGC range is 69.5dB typical
• Baseband level control circuit, power-down mode
• Low LO drive is -8dBm, ADC-compatible I/Q outputs
• Single supply operation is 2.7V to 5.5V
• Supply current (enabled) is 64mA typical
• Operating temperature is -40°C to +85°C, package style is 28-lead TSSOP

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