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TPA3128D2增益差异

Other Parts Discussed in Thread: TPA3128D2

客户再使用TPA3128d2,再增益上选择了26DB,可是现在测试数据时发现只有22DB。

按照规格上面应该是相差1DB误差的。 请问这个22DB是否合理还是我其他参数有误导致的。请各位帮忙看看原理图。感谢