• AD8420: When there going to be LT Spice model?, I need it for CMR assessment.

    It has AD8420.cir but not sure how to install this into LTSpice.

    When you going to release LTSpice version of AD8420.

    Thanks.

  • AD8420在采用电流反馈时。放大倍数会随着输入信号的变化而变化

    如下图所示，当输入信号变化（10-20mV）时，放大倍数会从100大概变到106，该如何解决？@

  • 使用AD8420用于放大电阻桥，没有压差时输出却接近3V，不清楚是什么原因？

    我在使用AD8420仪表放大器，驱动一个经典的电阻桥电路时，没有施加压力时输出异常； 电阻桥采用的是恒压源4V,

    基准电压3V同时给STM32F407VGT6做基准。设计增益为56倍，压力范围0~500g，输出压差是0~50mV，根据设置增益应该输出0~2.8V, 采用意法半导体STM32F407VGT6内部的12位AD。输入电压范围是0~VREF+ (0~3V), 麻烦老师看看我的电路哪里设计有问题吗？谢谢！

  • AD8420在使用3.3V单电源供电时，放大倍数不对！而使用5V单电源供电时正常。

    如题：AD8420在使用3.3V单电源供电时，放大倍数不对！而使用5V单电源供电时正常。

    我是按照PDF手册推荐电路做板测试的

    使用3.3V单电源工作，放大倍数是201倍时（1K和200K组合），

    输入3.3mV，输出电压只有0.460V，和0.663V相差太远了

    我把后续电路割断了，也是这样

    而把单电源换成5V，放大倍数正常

    请问这种情况正常吗？

  • RE: Whats the best Inamp for high speed current sensing?

    Hello Ian,

    Yes, I agree that your choice would be sufficient enough in your application. But you may also want to consider AD8420 or AD8421. AD8420 is a wide supply range, micropower, rail to rail inAmp but the bandwidth is a little lower. AD8420's CMRR…

  • RE: High Voltage Input Instrumentation Amplier

    Hi Terry,

    In response to your inquiry about the AD8420, it has not released yet, but if your design schedule allows it I believe it would also be a very good choice for your design. It has high input-protection, allows for single-supply operation, and…

  • RE: 单电源3.3V供电 仪器仪表参考端处理

    您好。请您参考AD8420和AD8237是否满足您的设计要求。

  • RE: AD8421使用疑问

    你的供电是12V，推荐AD8420。如果是5V供电的话，推荐AD8237.

  • RE: AD8237 Spice Model doesn't work with OrCAD

    Hi,

    For the meantime, you could try using AD8420 which is almost similar to AD8237. Both are micropower instrumentation amplifiers used for ECG applications.

  • How can I convert +-5V to a 4 to 20mA loop current signal?

    Hi,

    I have an electromechanical seismometer with a +-5V voice coil signal output representing velocity, and I want to signal condition the line by converting the signal to a 4 - 20mA output. I recently experimented with the EVAL-CN0314-EB1Z circuit eval…