Hi,

I built two amplifiers with gain set to X100

The intended use it to increase the accuracy of some automated test equipment.

It will take 4-wire resistance measurements

I am trying to get a gain of 100, but I am seeing a gain of ~0.7 for both…

Dear Sir:

               I used AD8228 to measure shunt current and used AD8253 to measure voltage as below circuit , We have a issue that when we tie +IN and -IN to GND  then Vout will measure 5.7V swing. When we remove AD8253 then AD8228 Vout=2.5V(Normal). What…

Dear Sir:

                We used AD8228 for shunt current sense application. We have some confuse from AD8228 output offset. As below picture we tried to measure same current on different common mode voltage and it had different current offset , Would you kindly…

Hi, guys~

I would like to know whether the offset voltage of an AD8228 chip is a specific value or it depends on some factors?

And I'm also interested in how can I measure it because it is so small.

Thanks in advance~

xcuresme

Good afternoon,

I've recently incorporated the AD8229 part into a prototype design, we are using this part in several places.  I was a bit shocked when I saw the commercial part was priced at $220 per part.  Needless to say, I'm looking for alternatives…

I am developing a precise current sensor based on shunt and instrumentation amplifier AD8228 sensing the load current of H-bridge.

Figure 1 is the H-bridge. The switches are IGBT switching at 30k~40k on fixed duty cycle. Vsense is the voltage of shunt…

如上图，最近看到了一个将精密放大器作为压控振荡器的应用（根据本人判断），在将压控振荡器输入端口与外电路断开，用示波器在波形输出端口能测得连续的锯齿波输出。按上述图制作PCB并购买零件安装却没有得到正确的振荡输出，测试发现在上电或断电瞬间有振荡波形输出，且频率较低。第二张图片为截取的AD8228内部原理图。

问题：此电路能否构成振荡，起振条件，影响振荡频率的关键参数。

         AD8228不同制造商是否存在零件差异(手头有表面白色衬底的和没有白色衬底的两种芯片）

         两种芯片在同一电路中各点测试电压严重差异…