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~
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
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…
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:
Sorry for my careless, Correct setup of AD8253 as below:
For schematic of the input side , We tried to tie +IN/ -IN to GND to watch offset of AD8228. but It measure 5.7V…
I'm experiencing the same problem. And the AD8228 model is not correct too.
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…
Here is my netlist
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+
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.