LM49370: Asking for the I2S to PCM solution recommendation

SHH

Mastermind 32206 points

Part Number: LM49370
Other Parts Discussed in Thread: LM49350

Hi Team,

Customer is using LM39470 for the I2S to PCM.

LM49370 application note.

However, customer do not need the headphone and speaker output.

Do you have more fit solution for this design request/

BR,

SHH

over 7 years ago

0 Steve-Wilson over 7 years ago

TI__Mastermind 30210 points

SHH,

While this device may have more features than the customer needs, i can't think of another device we have that does the same thing, without other features. Our SRCs are all I2S, S/PDIF or TDM, and they would be more expensive as well. This honestly might be the smallest, and cheapest option we have.

best regards,
-Steve Wilson

0 SHH over 7 years ago in reply to Steve-Wilson

TI__Mastermind 32206 points

Hi Steve,
Could you please help review customer's schematic?
txn.box.com/.../zkzlnjkz7ky8gpk1g9n53n3ahp18vymn

Customer only need I2S to PCM .

BR,
SHH

0 SHH over 7 years ago in reply to Steve-Wilson

TI__Mastermind 32206 points

add one more request on the schematic review, please help.

0 Steve-Wilson over 7 years ago in reply to SHH

TI__Mastermind 30210 points

SHH,

You need to still connect A_VDD and LS_VDD. See the note in operating ratings section:

Typically we recommend coupling unused inputs to gnd using a capacitor, but because you will not be using the ADC or DAC and they will always remain in mute, I don't think this is crucial.

The LM49350 or LM49352 are also capable of this function, and the cost on those devices is a little lower. it could save a considerable amount.

best regards,

-Steve Wilson

Audio

Audio forum

LM49370: Asking for the I2S to PCM solution recommendation