Hello,

In order to reduce noise, i use a JFET BF862 before the amplifier ltc6268-10,but i find a large offset current in oscilloscope. I want to know how solve it.

在LTC6268-10芯片手册中，为了减小寄生反馈电容的影响，采用反馈电阻分流的方式减小寄生电容。

请问，在这种工作方式下，为了使寄生电容降到最低，对电路板的材料类型和厚度有什么要求吗？

Hello,

Is there a Pspice model for this  component LTC6268 and LTC6269-10,

as I would like to simulate in other software.

Thank you

Hi engineer ：

 The scheme is as follows:

Then I test the J11 signal.The J10 is not connect anything.

But the waveform is like this.What are wrong.The input or the power?

Then can I use LT3092 to test the TIA circuit.

Connect J3 to TIA's J10.Looking…

Hi engineer ：

 The scheme is as follows:

Then I test the J11 signal.The J10 is not connect anything.

But the waveform is like this.What are wrong.The input or the power?

Then can I use LT3092 to test the TIA circuit.

Connect J3 to TIA's J10.Looking…

Hi engineers:

I use the LTC6268-10 as Photomultiplier Tube Post-Amplifier.The scheme as follows.

Example waveform from LTC6268-10 datasheet.

What is the delay between input and output?I test it about 10ns,is it right?Is there a nominal value?Thank you…

你好，我设计的20MHz光电转换电路的pcb布局如截图所示，使用的运放是LTC6268-10，根据datasheet的描述，需要在输入端口增加模拟地保护环以及“Other signals should be routed well away from this signal path and there should be no internal power planes under it”，这段英文的含义我不是很清楚，它是指将和芯片的同相输入和反向输入端焊盘下的铜皮掏空，以及将与输入节点相连的所有的电阻焊盘下的铜皮都掏空吗…

Hi

I turned to Bandwidth simulation in LTSPICE to use the LTC6268-10, but the result was different from the datasheet.

We want to implement a circuit with a bandwidth of 100MHz or more in the form of a transimpedance amplifier.

The LTC6268-10 datasheet…