• pin control for EVAL-ADA4255

    To Analog Devices, Inc.

    I am using ADA4255CP-EBZ(SN:2021042305881)and EVAL-SDP-CS1Z(SN:2021032503246)with nice controlabilty.

    I confirmed it to work normally for gain control.
    Next, I like to control the gain through ACE function based on “win32api”…

  • ADA4255 Gain Pins at LTSpice Model - Threshold Values

    Hello,

    I would like to test ADA4255 spice model.

    I see the input and output gain bits originally are shown in LTSpice as G0...G5 pins.

    What voltage value should be input there as logic "1"?

    Any thresholds?

    By the way, It would be good you…

  • ACE test ADA4255 evaluation board appeared 2 problems

    ACE software version: 1.24.3095.1398, ADA4255 plug-in version: 1.2021.272000

    In the figure above, the 5 switches shown in red circles, switch on and off any switch, the other switches also operate at the same time, as if it is the same switch, do not…

  • My ADC only requires a single-ended input, but the ADA4255 has differential outputs. Can I just take one output of the ADA4255 and provide it to the ADC?

    I am using ADA4255 as a current sensing amplifier since it can measure small differential signals over a very wide common-mode input range.

  • ADA4255的输出是否可以直接接到AD4134

    我们有个项目需要用到ADA4255用于信号增益调整,ADC选用的是AD4134,想问一下ADA4255的输出是否可以直接接到AD4134,前提是保证AD4255的信号输出在AD4134的可接受范围之内

  • ACE 测试ADA4255评估板时的出现的2个问题

    ACE 软件版本:1.24.3095.1398 , ADA4255插件版本:1.2021.272000

    1.ACE ADA4255插件的问题:

    在上图中5个红圈所示的开关,开关任何一个开关,其余开关也同时动作,就好象是同一个开关,不知道是为什么?

    上图中将输入放大器的输入端短接,查看INPUT_MUX计存器SW_D12位也置1了,按说输出应该保持0才对,但是实际示波显示输入信号还是可以正常显示在输出端,不知道这是为什么?还需要做什么特别设置吗?

    2.ADA4255评估板PWR和PWR2的供电都是3…

  • 使用ACE软件对ADA4255CP-EBZ 评估板测试时出现的两个问题

    1.ADA4255评估插件使用的问题:

    使用的ACE软件版本是1.24.3095.1398,ADA4255评估板插件版本是1.2021.27200

    上图中5个红圈地中的开关,开关任何一个开关时,其余开关同时动作,无法正常设置开关的状态。

    闭合上图中的输入短接开关后,提交应用后,输入放大器的输入被短接,此时输出应该没有信号。

    读取ADA4255的INPUT_MUX计存器的SW_D12位也是1,按说此时输入信号不会出现在输出端,但实际示波显示输入信号仍然出现在输出端,感觉输入短接开关没有启到短接的作用…

  • RE: Dual LTC6373 (in series) driving AD4134 channel

    Hi Kristine,

    I have investigated the ADA4254 (and ADA4255 & PGA280) but the 17nV/rtHz is just a little too high. It's so close but, according to our calcs, we lose a couple of bits of resolution to noise at the highest gains compared to two LT6373s.…

  • RE: AD8422与数字电位器AD7376配合使用的输出信号失真

    我觉得你可以关注一下电位器电阻端的参数:

    以下是AD5293的参数,你可以看到端电容得大小,这个应该会影响你的带宽,同时还需要注意共模电流,这个共模电流可能会导致输出的失调误差。

    AD7376同样存在类似的问题

    所以,可能要慎重选择用数字电位器做可编程增益的仪表放大器的设计,尤其是考虑带宽的影响。

    我更建议选择ADA4254,ADA4255,LTC6373,ADA4558 这种内部做了可编程增益的仪表放大器,参数内部可控,这样会好很多。

  • RE: High voltage variable gain instrumentation amplifier.

    Hi Kristine,

    Thank you for your quick response.  We are using the ADA4254 now; it's the only commercially available product we have been able to find, thus far, that is remotely capable of being useful in our product.  Its gain range is highly valuable…