AD的技术专家们,我想知道AD5541数模转换器能够转换的信号带宽是多少,为什么芯片手册上没有,我用这款芯片10kHz的信号可以转换,而换成25kHz左右的信号却不能正常转换,这是怎么回事?

AD的技术专家们,我想知道AD5541数模转换器能够转换的信号带宽是多少,为什么芯片手册上没有,我用这款芯片对10kHz的信号可以进行转换,而换成25kHz左右的信号却不能正常转换,这是怎么回事?

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    •  Analog Employees 
    on Oct 23, 2014 6:06 AM

    您好!如果是按照Figure24的连接,那么输出与运放的Slew Rate有关。请您参考这里的描述:For fast settling, the slew rate of the op amp should not impede the settling time of the DAC. Output impedance of the DAC is constant and code-independent, but to minimize gain errors, the input impedance of the output amplifier should be as high as possible. The amplifier should also have a 3 dB bandwidth of 1 MHz or greater. 您可以把您的电路图和波形发出来看看。

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  • 0
    •  Analog Employees 
    on Oct 23, 2014 6:06 AM

    您好!如果是按照Figure24的连接,那么输出与运放的Slew Rate有关。请您参考这里的描述:For fast settling, the slew rate of the op amp should not impede the settling time of the DAC. Output impedance of the DAC is constant and code-independent, but to minimize gain errors, the input impedance of the output amplifier should be as high as possible. The amplifier should also have a 3 dB bandwidth of 1 MHz or greater. 您可以把您的电路图和波形发出来看看。

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