AD8348ARUZ

AD8348 is a broadband quadrature demodulator with an integrated intermediate frequency (IF), variable gain amplifier (VGA), and integrated baseband amplifiers. It is suitable for use in communications receivers, performing quadrature demodulation from IF directly to baseband frequencies. The baseband amplifiers are designed to interface directly with dual-channel ADCs, such as the AD9201, AD9283, and AD9218, for digitizing and post processing. The IF input signal is fed into two Gilbert cell mixers through an X-AMP® VGA. The IF VGA provides 44dB of gain control. A precision gain control circuit sets a linear-in-decibel gain characteristic for the VGA and provides temperature compensation. The LO quadrature phase splitter employs a divide-by-2 frequency divider to achieve high quadrature accuracy and amplitude balance over the entire operating frequency range. It is used in application such as QAM/QPSK demodulator, W-CDMA/CDMA/GSM/NADC, wireless local loop, LMDS etc.

• Single supply voltage range is 2.7V to 5.5V
• Operating IF frequency is 50MHz to 1000MHz
• Baseband bandwidth is 75MHz typical
• Gain control range is 44dB typical
• Third-order input intercept (IIP3) is 28dBm typical at (minimum gain, FIF = 380MHz)
• Phase accuracy is 0.5° typical, amplitude balance is 0.25dB typical
• Noise figure is 11dB typical at (maximum gain, FIF = 380MHz)
• Input bias current is 2μA typical
• Operating temperature is -40°C to +85°C
• Package style is 28-lead thin shrink small outline [TSSOP]

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ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party