Hello.

①Are there the input and output properties data(graph and digital data) of the DAC simple substance?

②The Vref of the DAC is Full-Scale Output Voltage(1.0Vrms)?

I want to know the voltage of 1LSB.

③When I set MX5G3/MX6G4 in 6dB, is the upper limit level of the output(MX5G3/MX6G4) 0.92Vrms?

④When I set MX5G3/MX6G4 in 6dB, what is the lower limit level of the output(MX5G3/MX6G4)?

⑤When I set L/ROUTVOL in -14～6dB, is the upper limit level of the output(L/ROUTVOL) 0.92Vrms?

⑥When I set L/ROUTVOL in -14～6dB, what is the lower limit level of the output(L/ROUTVOL)?

⑦There is parameter for DAC TO LINE OUTPUT on pg.6 “Gain Error 3%”.

What does it mean? (3%=All GAIN settings?)

⑧There is parameter for DAC TO LINE OUTPUT on pg.6 “Gain Error”.

Please teach the MAX value of GAIN ERROR.

Best Regards,

MAPS346

Hello MAPS346

I will answer below within your questions:

①Are there the input and output properties data(graph and digital data) of the DAC simple substance?

I think you are asking for the specifications of only the DAC and not the DAC plus the line output or the headphone output? That answer would be no, because there is no way to isolate only the DAC. That said, the performance graphs of the interpolation filter are only the DAC because these graphs are generated by the models used during the design of the part.

②The Vref of the DAC is Full-Scale Output Voltage(1.0Vrms)?

I want to know the voltage of 1LSB.

You may find that some parts will get to 1.0Vrms but we have to specify the full scale to be true for all temperatures and all process skews plus a guard band. That is why you see the specification of 0.92 Vrms for full scale output rather than 1Vrms even though the formula does state it will be AVDD/3.3. That is an ideal specification. Remember that the full scale output will scale with the AVDD voltage.

So calculate the voltage for a single LSB you need to divide it by the number of steps. So 0.92/ 2^24. Now in reality, this is down into the noise floor. So if the noise floor is around -98 dB then 98/6 (6dB per bit) will give you just over 16 bits of usable resolution. So then I would use that number for calculating the voltage of 1 LSB. 0.92/2^16. Also, I want to point out that this is RMS and not peak to peak.

③When I set MX5G3/MX6G4 in 6dB, is the upper limit level of the output(MX5G3/MX6G4) 0.92Vrms?

The upper limit of the outputs will always be 0.92Vrms.

④When I set MX5G3/MX6G4 in 6dB, what is the lower limit level of the output(MX5G3/MX6G4)?

I am not sure I understand this question? The lower limit of the signal will be the noise floor.

⑤When I set L/ROUTVOL in -14～6dB, is the upper limit level of the output(L/ROUTVOL) 0.92Vrms?

Same as #3

⑥When I set L/ROUTVOL in -14～6dB, what is the lower limit level of the output(L/ROUTVOL)?

Same as #4

⑦There is parameter for DAC TO LINE OUTPUT on pg.6 “Gain Error 3%”.

What does it mean? (3%=All GAIN settings?)

No, just at the default gain.

⑧There is parameter for DAC TO LINE OUTPUT on pg.6 “Gain Error”.

Please teach the MAX value of GAIN ERROR.

Full scale output of 0.92 + or - 3%. I think in this part what it really is saying is that the distribution of the gain error is within 3%. Since the full scale voltage is low, to account for full range of temperatures and process skews, this gain error spec is generally the distribution difference between part to part rather than a simple input of 0.92 = 0dBFS. Because it will be a little over 1 dB down on all parts and this is not an error.