TAA5212: Power consumption and noise floor

Hi Mochizuki-san,

Our noise plots span the audio band 20Hz - 20kHz, there will be a dramatic drop off (no audio data) in the plot past this point. You can find these plots listed in the datasheet for each device.

Hi Daveon,

On the datasheet, we can find Fs= 192KHz noise floor plot data. Our customer need to see noise floor above 20KHz to 80KHz because of 192KHz sampling EE application.

How is power consumption performance data at Fs=192KHz working condition?

Regards,

Mochizuki

Hi,

Today is a holiday for our team in the U.S. We will follow up when our team returns on Friday.

Thank you for your patience,
Jeff McPherson

Hi Mochi,

The sampling frequency is the rate the analog signal is digitally sampled, generally much higher than the audio band ( multiple of 44.1kHz or 48kHz). the audio band is the range of human hearing (20-20kHz) and the portion of the signal that the sampling process aims to capture. This range is where many audio plots are recorded/played to measure performance.

For example you can see a noise floor plot in Figure 17 of TLV320ADC6140 datasheet. Past 20kHz a dramatic drop-off will occur as shown in Figure 15. The data is collected at 48kHz and is expected to be the same at 192kHz sampling.

Power consumption matrix is listed in the technical documentation section of the product page. TAA5212 is still in pre-release so data is not final, the customer can use TAC5212 power consumption matrix as a rough reference.

Regards,

Hello Daveon,

Thank you for the reply.

We have visited TAC5212 datasheet to know power consumption specification but it is still TBD too.

And there is not 192KHz measurement condition.

If possible, please disclose actual number of TAA5212 fs=192KHz power consumption, no need (typ), (max) as just reference number. To secure DIN, it is very important at this year-end season.

TLV320ADC6140 Fig15 is pass band frequency response under following condition.

" fS = 48 kHz, 32-bit audio data, all performance measurements are done with a 20-kHz, low-pass filter, and an A-weighted filter"

That is why we can see just below 20KHz frequency response.

In the market our customer produce fs=192KHz recorder to capture up to 80KHz signal, please provide us noise floor data which your design team might have a verification data.

Regards,

Mochizuki

Hi Mochizuki,

Yes, our test/validation team is still collecting this data. You can reference this application note in the meantime as a rough estimate:

I will try to find any TAA5212 preliminary numbers I can share.

Mochi said:

In the market our customer produce fs=192KHz recorder to capture up to 80KHz signal, please provide us noise floor data which your design team might have a verification data.

I can provide this data for you, but it will be done by hand on the bench since our validation team does not have this. Can you confirm you want a plot similar to figure 15? 

 Hi Daveon,

 Noise floor FFT plot is Fig17 and Fig 8 on TLV320ADC6140 datasheet.

 We have e-mail communication about those inquiries.

 Let's move there.

 Regards,

 Mochizuki