LM49450: LM49450 Phase delay

kerr chang

Genius 4075 points

Part Number: LM49450

Hi Team

I have use LM49450. but LM49450 Phase delay test is 55° , our spec is < 30°.

How to debug is issue by HW / LAYOUT or SW ?

over 5 years ago

0 Ivan Salazar over 5 years ago

TI__Guru** 102045 points

Hi Kerr,

My colleague will check your questions and provide some feedback as soon as possible.

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

0 Luis Fernando Rodriguez S. over 5 years ago in reply to Ivan Salazar

TI__Guru* 84915 points

Hi, Kerr,

Since there's no EVM to debug the issue, we will need to take a look at your schematic and registers settings so we could help you to debug this issue. Could you share this information, please? In addition, could you provide the I2S clocks frequencies that you are using in your design?

Best regards,
Luis Fernando Rodríguez S.

0 Luis Fernando Rodriguez S. over 5 years ago in reply to Luis Fernando Rodriguez S.

TI__Guru* 84915 points

Hi, Kerr,

Could you take a look at my reply above? Is it possible to provide this information? You may share it via E2E chat if you prefer.

Best regards,
Luis Fernando Rodríguez S.

0 kerr chang over 5 years ago in reply to Luis Fernando Rodriguez S.

Genius 4075 points

Hi Team

MCLK is 12.288 and sample rate is 48k

The HP output between connector and IC did not have any Components.

I2C setting

0x00 21

0x02 49

0x07 14

0 Luis Fernando Rodriguez S. over 5 years ago in reply to kerr chang

TI__Guru* 84915 points

Hi, Kerr,

Could you provide the entire schematic for more details, please?

In addition, could you try to modify the register 0x02 from 49 (73 in dec format) to 4b (75 in dec format)?

Best regards,
Luis Fernando Rodríguez S.

0 Luis Fernando Rodriguez S. over 5 years ago in reply to Luis Fernando Rodriguez S.

TI__Guru* 84915 points

Hi, Kerr,

I'm closing this E2E thread since we are treating it via email.

Best regards,
Luis Fernando Rodríguez S.

0 Luis Fernando Rodriguez S. over 5 years ago in reply to Luis Fernando Rodriguez S.

TI__Guru* 84915 points

Issue solved:

Setting register 0x00 from 21 to 61 corrected the phase delay.

Best regards,
Luis Fernando Rodríguez S.

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LM49450: LM49450 Phase delay