AMC1305L25: VCAP pin

Brian Wang0928

Genius 14030 points

Part Number: AMC1305L25
Other Parts Discussed in Thread: AMC1304L05

Tool/software:

What's the max. value of the VCAP pin? in the e/c, it only addresses the 3.45V as typical value.

Sorry, this is for the AMC1304L05. thanks.

Regards

Brian

11 months ago

0 Alexander Smith 11 months ago

TI__Guru 55152 points

Hi Brian,

There is not a specified maximum capacitor value. Depending on the severity of the noise additional capacitance can be added for additional filtering.

0 Brian Wang0928 11 months ago in reply to Alexander Smith

TI__Genius 14030 points

Why i ask this question is that customer would like to add one more TVS connected in parallel with VCAP for noise immunity in MD application.

The TVS is PDZ5.6B (0.4W 5.48-5.73V SOD-323-2P SMD)

the lowest clamp voltage is 5.48V. Is that ok or not when it's place at VCAP? thanks!

Regards

Brian

0 Alexander Smith 11 months ago in reply to Brian Wang0928

TI__Guru 55152 points

Hi Brian,

VCAP voltage is typically 3.45V so I don't think the TVS would help much here under normal conditions. Are they seeing noise beyond 5.48V on this pin?

Filtering at LDOIN may be more effective.

Data converters

Data converters forum

AMC1305L25: VCAP pin