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Hello, 
 on my current design I use this device ADM2561EBRNZ, but inside datasheet, i dont found the value of internal oscillator. This oscillator is used for internal DC-DC converter. What is the frequency range ? What is the ripple voltage of Vout (isolated) ? Do you have a waveform captured by scope on output ?...a think it's triangular waveform with ripple voltage Thank for your help Best regards

ericb · Accepted Answer

Hello, 
 The isolated dc-dc converter within the ADM2561E has a primary switching frequency of approximately 180 MHz. When the waveform is rectified on the secondary side its frequency is doubled and so will be approximately 360 MHz. 
 The isolated Vout voltage will have a ~360 MHz triangle ripple voltage component present on the average dc voltage. There will be some higher harmonics which will add some additional ripple to the triangle waveshape. The exact amplitude of this ripple will depend on the filtering components and load which are present when you're making the measurement. 
 Eric)

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