AD8221AR by Analog Devices Inc.(ADI) Design and production,in Shenzhen Yirenxin Technology Co., Ltd. Spot sales,And can pass Shenzhen Yirenxin Technology Co., Ltd. Purchasing。AD8221AR Price reference $ 10.530000。AD8221AR - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information AD8221AR Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial