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AD5123 RAB輸入頻率問題

tchen340
on Dec 20, 2019

Dears,

AD5123設計應用RWB調整op buffer gain,當op輸入訊號頻率在 7.8KHz 時,輸出波形正常.

但當op輸入訊號頻率在 125KHz & 500KHz 時,輸出波形不正常.(量測點B355,B356,B357)

相同的條件下,將AD5123改用一般電阻,波形正常.(量測點A351,A352,A353)

請問是什麼原因呢?線路及量測點與波形如下.謝謝.

線路及量測點:

A351

A352

A353

B355

B356

B357

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