TAS5753MD: TAS5753MD startup sequence

matt holland

Intellectual 260 points

Part Number: TAS5753MD
Other Parts Discussed in Thread: , TAS5707

I failed to notice the 100us requirement to ramp PVDD after AVDD/DVDD. What happens if these come up at the same time?

over 6 years ago

0 matt holland over 6 years ago

Intellectual 260 points

I notice that the TAS5753MDEVM ignores this startup sequence requirement as well. PVDD is applied which in turn powers the 3.3v regulator on the ppcmbevm, so it's impossible for AVDD/DVDD to come up first even in the EVM.

0 Shawn Zheng over 6 years ago in reply to matt holland

TI__Mastermind 24835 points

Hi Matt,
PVDD can ramp up after DVDD/AVDD, but RST and PDN have to be in low voltage until DVDD/AVDD is stable to avoid the pop noise. Pleae find more info in this post e2e.ti.com/.../470057. That post is about TAS5707, but it also applies to TAS5753MD.
Best regards,
Shawn Zheng