AD820AR by Analog Devices Inc.(ADI) Design and production,in Ruishengda Information Technology Co., Limited Spot sales,And can pass Ruishengda Information Technology Co., Limited Purchasing。AD820AR Price reference $ 6.110000。AD820AR - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information AD820AR Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial