Hi

I can't find in datasheet input resistace of this amplifier. How can i calculate it?

Does series resistor has impact on offset voltage, bias current?

What all are the trade off?

Can calibration help minimizing errors due to added series resistor?

As shown in the figure, I use AD8656 as a two channel trans-impedance amplifier to achieve a current-voltage convert circuit. The problem is I find the chip is very ease to be damaged. I have use the multimeter to test the register between the negative…

Hi,

Could you tell me what is the input referred current noise of AD8656. I could not find the same from the data sheet where only the input voltage noise density is specified as 2.7nV/√Hz @ 10 KHz.

Hi

I have a question about AD5686 (4ch 16bit DAC).

Could you let me know how should I think about REF selection.

AD5686 is multi ch DAC but it doesn't have REF buffer inside.

So, I am concerned that REF selection affects to accuracy of each…

Hello,

I'm using the AD8656 as audio amp for a stereo signal. A schematic of the important part and component is attached.

My problem is: When drawing significant current (above 1mA) there is a very disturbing crosstalk between both channels (above…

运放在高增（放大倍数为100）时产生固定频率60KHz和幅值3~4mV固定的纹波，随着输入信号的增加，纹波的大小和频率基本上没有变化，这个是什么原因造成的？

而低增益（放大倍数为2）时，没有明显的固定频率和幅值固定的纹波。为什么？

产品要求：输出上升和下降时间在10uS之内。请问运放选择有问题吗？

Hi,

I have an AFE which uses the AD8221 in-amp.

Is it possible to drive the AD7176-2 with this in-amp directly or should I use a buffer stage (i.e. AD8656) to drive the ADC?