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https://e2e.ti.com/support/amplifiers-group/amplifiers/f/amplifiers-forum/1137140/opa4990-opa4990irter-opa4990sirter
您好：
OPA4990IRTER 和 OPA4990SIRTER 之间的差异
尊敬的 Kevin：
"S"表示关断控制。 请参阅数据表(SBOS933I)第7、9页的引脚排列。
如果没有"S"、则两个引脚不连接。
