• About reference for  AD7176-2

    Hi there,

    I have questions about AD7176-2.

    According to the datasheet, there are some recommended external reference like ADR441.

    #1,Do you think it's fine to use one piece of ADR441 for two or three pieces of AD7176-2?

    #2,About the current load…

  • ADR441 - Additional Noise Data Requested

       Good morning.  I have a customer currently using the ADR421 as a voltage reference in multiple projects.  The spec on this part indicates 1/F noise of 1.75uV and noise of 80nV/√Hz @1KHz.  The noise graph shows that about same noise is present in the bandwidth…

  • RE: Tailoring the AD7173-8 ADC input range

    Hi James,

        The ADR441 has a voltage noise of 1.2uVp-p and a 48nv/rtHz of voltage noise density. The AD7173-8 has an available internal buffer for the internal reference. Using a resistor divider to have a 1.1V to ADC Ref pin maybe suitable, since the…

  • RE: Internal ADC reference selection

    on customer board, there usually will be no jumpers to allow connect the external reference to the VREF0/1 pins mannually, so there is a conflict:

    1) after power up, it is configured to be internal reference by default.

    2) while the board is expected…

  • RE: AD717x, external C is required when Internal REF is enable

    Hi Akihiko,

    Yes you are correct.

    With REFBUF enabled, the buffers provide the benefit of giving the user high input impedance and allow high impedance external sources to be directly connected to the reference inputs. But when using external references…

  • ADR280 .1 - 10hz voltage noise

    I want to use a 1.2 volt precision reference for the midpoint in a single ended instrumentation amp.

    On analog.com website parametric search, a voltage noise value of 2.2 uV p-p is listed for the ADR280.

    Other parts such as the ADR441 list a voltage…

  • RE: 这11大应用领域,你在里面么?

    我最关注仪器仪表与测量,由于本人从事测量仪器仪表产品研发,经常使用ADI公司的精密放大器、ADC、DAC、电压基准,ADR441低噪声、低温漂基准广泛使用在高精度仪器仪表中。

  • 请问ADC的低噪声基准电压ADR441的TRIM脚可以悬空吗?

    我在做一个24位ADC数据采集,想用ADR441产生低噪声基准电源。该芯片有一个TRIM脚,手册上说可以用来用户调节0.5%的输出。我的电路板尺寸有限,可以直接将这个脚悬空吗?

  • RE: ADC7767的数据采集问题

    AD的基准源是ADR441,有10mA的驱动能力,大电容为100uF的钽电容滤波。基准源的信号非常稳定。

    现在惟一的原因我认为是电源地干扰造成的,一时没有办法去除。地已经分割了,且是单点连接到大地上。模拟和数字的地是隔开的。

  • RE: ADuC847 Reference input range vs. ADC Range

    Bill,

    The test setup used to generate the ADC noise tables in the datasheet would have applied 0V to the ADC inputs - usually applied by shorting the external inputs at the pin. For example, AIN1-AIN2 would have been selected and the pins on the part…