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AN1349/decoupling capacitor

Question asked by on Aug 18, 2016
Latest reply on Aug 23, 2016 by RAnslow

Please teach me decoupling capacitor.


There is the following description to P7 of AN1349.
> 'High Voltage Discrete Stitching Capacitor'
>The specific placement of decoupling capacitors, the discrete high voltage capacitor, and the ferrites on the VISOOUT and GND2 pins are critical to achieve CISPR22/EN55022B classification.
>The use of a high voltage discrete capacitor to pass emission limits has been proven for the ADM2587E powered for both 3.3 V and 5.0 V supplies, and for the ADM2582E powered at 5.0 V supply.

Do you have a issue using the laminated ceramic capacitor to this high voltage discrete capacitor?
Please teach me if there is a test track record or advice.

P3 of the following description was confirmed.
>The 10 μF capacitor on the VCC pin (Pin 7) provides a large charge reserve locally on the PCB.
>It is important that these capacitors have a very low equivalent series resistance (ESR) and low equivalent series inductance (ESL) at 180 MHz and 360 MHz.


Thank you.