• Offset of AD8228

    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

  • RE: AD8229 vs AD8228

    Dave,

      What industry are you in?   30 years ago, the downhole guys would take a commercial part, test it at high temp, and if it

    survived 100 hours they would go with it.  The high temp line from ADI allows them to go a lot more than that, so it saves

    them…

  • RE: AD8228 offset issue.

    Dear Emman:

                          Thanks for your reply. I used 500m ohm Rsense for current measure and Gain=10 of the AD8228. Actually , I had used AD8228 simulation tools on ADI website and below picture is simulation result , Do you have suggestion for this…

  • RE: Where can I find SPICE models for ADI amplifiers?

    If a SPICE model is available, it is located under the "Tools, Software & Simulation Models" link on our product page.

    For example, for the AD8228 fixed gain instrumetation amplifier, the product page is here:

    http://www.analog.com/en…

  • RE: AD8228 output swing

    Dear Emman:

                            Sorry for my careless, Correct setup of AD8253 as below:

    +VS=7.5V

    -VS=-5V

    REF=GND

    A0/A1=GND

    WR=-5V

                       For schematic of the input side , We tried to tie +IN/ -IN to GND to watch offset of AD8228. but It measure 5.7V…

  • RE: AD8250 - AD8253 spice model LTspice results

    I'm experiencing the same problem. And the AD8228 model is not correct too. 

  • Precise measurement using AD8228

    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…

  • AD8228构成的压控振荡器

    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…

  • How can to fix netlist after changing symbol pin order?

    Here is my netlist

    * C:\Users\ROSE\Documents\ADIsimPE\inst_amp.wxsch

    *#SIMETRIX

    V1 V1_P 0 5

    V2 U1_VS- 0 -5

    V3 V3_P 0 1

    V4 V4_P 0 0

    X$U1 V4_P U1_RG1 U1_RG2 V3_P U1_VS- 0 U1_OUT V1_P AD8220 pinnames: IN- RG1 RG2 IN+ VS- REF OUT VS+

    .op

    *.TRAN …

  • RE: PCB layout of EVAL-INAMP-82RZ

    Hi, xcuresme.

    I already contacted the applications engineer of AD8228 regarding the PCB layout and the detailed schematic diagram of the EVAL-INAMP-82RZ. I'll keep you posted on this.

    Regards,

    Anna