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LM49350: recommendations

Part Number: LM49350
Other Parts Discussed in Thread: TLV320AIC3253, TLV320AIC3107,

hi,

I'm looking for and Audio Codec: 

- mono

- around 90% efficiency (probably implies D-class)

- I2S interface

- around 0.4-0.8W into 8Ohm speaker

- low quiescent current (disable pin or similar)

- volume control would be nice to have, but not necessary

- preferably 3x3 or 4x4 QFN package, or similar BGA routable without HDI features (4/4mil 4-layer board, mechanical vias strongly preferred)

it seems the only option is the LM4935x, but as I'm not the max expert in this area, I was looking for advice or confirmation my selection is ok...

Initially I was looking at TLV320AIC3253 as only option in QFN... hope you may prove me wrong  :)

thanks a lot in advance

KR

Vincenzo

  • Vincenzo,

    There are really only a couple options for the package type and size you want. You've already mentioned the LM4935x devices, but the TLV320AIC3107 also comes in a 3.3 x 3.5 BGA package. the LM49350 and AIC3107 are pretty similar in terms of specs and capability, the LM49352 has better SNR for the ADC and DAC.
    The AIC3107 has a reset pin you can control for low current mode, while the LM4935x has register you can write to in order to bring the device out of standby.
    If an Evaluation module is important to you the AIC3107 currently has an EVM available while the LM4935x devices do not. We are working on a new EVMfor the LM49352 but it will be a while before it is released.

    best regards,
    -Steve wilson