• RE: AD7794 External Voltage

    This was answered on another thread, so i copied it and pasted it below.

    ------------------------

    Hi cevdet29,

    The AD7794 suggests the use of ADR391 and ADR381 which are 2.5 V micropower low noise voltage reference.

    For 3.3V, I suggest you use the ADR4533…

  • RE: AD7794 intead of ADUCM360

    Hi cevdet29,

    The AD7794 suggests the use of ADR391 and ADR381 which are 2.5 V micropower low noise voltage reference.

    For 3.3V, I suggest you use the ADR4533 which is ultra-low noise but has Is=950uA compared to the ADR391 with Is=120uA.

    Yes you can connect…

  • about the noise density of voltage reference IC.

    Hello,

    I'm looking for low-cost,low-noise voltage reference IC for precision ADC.

    ADR391/381/361 are matched for my purpose.

    So,I'd like to know the value of noise density at 100KHz.

    I can see this value only on datasheet of ADR391,however…

  • RE: AD7780 non-ratiometric usage

    Hi Kevin,

    The input range is defined by Vref. So, with a 2.5V reference, the input range is +/-2.5V/gain which equals +/-19.5 mV. If you are using an absolute reference, a low-noise reference such as the ADR381/ADR391 should be used.

    Regards,

    John…

  • AD7789 sensor 2.5V - all or nothing issue, 00..00 or 11..11

    Hello

    I have a sensor that provides its value between 0.5V to 2.5V.
    I am using an AD7789 with 2.5V reference voltage (ADR391) to REF +, ref- grounded. (AGND = DGND = global GND)
    AIN- to ground
    AIN + directly to sensor signal

    When reading the result of…

  • RE: AD7788 increase the input range

    Hi Ocela,

       As mentioned on the AD7788 datasheet it can have a unipolar and bipolar ranges. The Ain+ input can be referred to the Ain-. As an example, when using 2.5V on Ain-. The input voltage range is from 2.5V to 5V but when it is in bipolar mode the…

  • AD5445 single supply application

    I am using AD5445 to generate output voltage 0-1.25V from a single 5V supply.

    I literally implemented circuit from the figure 51.

    Vin is supplied from ADR391 (2.5V voltage reference), the bias voltage is exactly 1/2 of the Vref.

    My output buffer is…

  • RE: AD7685+AD8275 对标准模拟信号的采样,采样数据不稳定??

    用AD8275驱动AD7685已经是绝配了,中间不需要缓冲了,到是AD8275的输入端需要增加滤波电路,根据你0-10V的带宽设置滤波器参数。还有用4.096V的基准电压不好吗?去掉AD8031部分电路吧,设计PCB时ADR391的3、4引脚在AD6875的1脚相连。再建议:要保证AD_5V电源的低噪声。

  • CN0194 - Galvanically Isolated 2-Channel 16-bit ADC

    Hi,

    I am a student in final year of engineering. As a part of our curriculum, we have to make a project. My project is to develop a data acquisition card. The features required for my project is along the lines of CN0194, but instead of SDP board, I…

  • [征文] IN118的基准源用AD的芯片,上面写着D6B,困饶我很久了 AD5312


    这个芯片(AD9833)的名字我猜的,可忽略看,如果是这个芯片,左看右看也不知是干吗呢?