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AD9281双通道8位分辨率CMOS模数转换器
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The AD9281 is a complete dual channel， 28 MSPS， 8-bit CMOS ADC. The AD9281 is optimized specifically for applications where close matching between two ADCs is required （e.g.， I/Q channels in communications applications）。 The 28 MHz sampling rate and wide input bandwidth will cover both narrowband and spread-spectrum channels. The AD9281 integrates two 8-bit， 28 MSPS ADCs， two input buffer amplifiers， an internal voltage reference and multiplexed digital output buffers. Each ADC incorporates a simultaneous sampling sample-andhold amplifier at its input. The analog inputs are buffered; no external input buffer op amp will be required in most applications. The ADCs are implemented using a multistage pipeline architecture that offers accurate performance and guarantees no missing codes. The outputs of the ADCs are ported to a multiplexed digital output buffer. The AD9281 is manufactured on an advanced low cost CMOS process， operates from a single supply from 2.7 V to 5.5 V， and consumes 225 mW of power （on 3 V supply）。 The AD9281 input structure accepts either single-ended or differential signals， providing excellent dynamic performance up to and beyond 14 MHz Nyquist input frequencies.
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