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TL431: 动态阻抗测试问题

Part Number: TL431

请问下ZKA在手册上电气化特性中的测试条件是VKA = Vref, f ≤ 1 kHz, IKA = 1 mA to 100 mA,手册上最严苛的测试条件是IKA的中心值是1mA,电流波动幅度是多大呢?如果幅度是1mA那么IKA<Imin了,不能正常工作?

请问手册上具体测试条件是什么?IKA中心值是(1mA+100mA)/2=50.5mA吗?