PCM1803A: Power Supply Requirement

Akio Ito

Part Number: PCM1803A
Other Parts Discussed in Thread: PCM1802, PCM1804

Hi,

A customer has two questions about PCM1803A power supply.
Q1. Does PCM1803A have any power supply sequence requirement?
He thinks two power pins must be powered up simultaneously, if PCM1803A has internal protection diodes between VCC and VDD.
Q2. Does PCM1803A have a requirement power up time from zero volt to minimum operating voltage?
Currently, their power supplies need up to several ten msec or so as rise time.

Best regards,

Akio Ito

over 5 years ago

0 Diego Melendez over 5 years ago

TI__Guru 57800 points

Hi, Ito-san,

This part should not have particular power-on timing requirements as long as it is held in power-down state until all the power supplies provided are stable and at the correct level.

Best Regards,

-Diego Meléndez López
Audio Applications Engineer

0 Akio Ito over 5 years ago in reply to Diego Melendez

Genius 3595 points

Diego-san,

Thank you for your answer.
His ground of the assumption that two power supply pins are connected by the diodes, is an application report in the following thread.
http://e2e.ti.com/support/audio/f/6/t/251395?PCM1795-PCM1808-Power-up-sequence

Does PCM1803A belong to the category of Specification-1 products same as PCM1802 and PCM1804?

Best regards,

Akio Ito

Audio

Audio forum

PCM1803A: Power Supply Requirement