TAS2770: Power-up of TAS2770

Tom Huang1

Part Number: TAS2770

Hi,

We saw a glitch on the rising edge of IRQZ during TAS2770 power-up.

In our case, VBAT is enabled firstly and then enable 1.8V power for both AVDD and IOVDD. IRQZ is pulled up to same 1.8V power via a external 10k resistor.

Is this glitch on IRQZ a normal behavior of TAS2770?

over 3 years ago

0 Luis Fernando Rodriguez S. over 3 years ago

TI__Guru* 84915 points

Hi, Tom,

Our team will take a look at this information and will provide a response as soon as possible.

Best regards,
Luis Fernando Rodríguez S.

0 Ivan Salazar over 3 years ago

TI__Guru* 95175 points

Hi Tom,

As long as the device is being able to be configured correctly after completely powered up, it should be OK.

Perhaps this glitch is caused by some transition during power supply ramping through Vh threshold.

Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators

0 Ivan Salazar over 3 years ago in reply to Ivan Salazar

TI__Guru* 95175 points

Hi Tom,

Is your application working correctly when fully powered up?
Do you have any further questions?

Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators

0 Tom Huang1 over 3 years ago in reply to Ivan Salazar

Prodigy 120 points

Hi Salazar,

One more question.

May I know if there is a internally pull-down resistor for SDZ?

0 Ivan Salazar over 3 years ago in reply to Tom Huang1

TI__Guru* 95175 points

Hi Tom,

SDz pin must be driven externally, there is no internal state for this pin.

Best regards,
-Ivan Salazar
Applications Engineer - Low Power Audio & Actuators

0 Tom Huang1 over 3 years ago in reply to Ivan Salazar

Prodigy 120 points

Hi Ivan,

Thanks for your response.

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TAS2770: Power-up of TAS2770