STW5098_07 datasheet(75/86 Pages) STMICROELECTRONICS

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Typical performance plots

STw5098

74/85

Typical performance plots

Figure 14.

Bass treble control, de-emphasis

filter

Figure 15.

Dynamic compressor transfer

function

Figure 16.

ADC audio path measured filter

response

Figure 17.

ADC in band audio path measured

filter response

Figure 18.

DAC digital audio filter

characteristics

Figure 19.

DAC in band digital audio filter

characteristics

Bass and treble gains are independently selectable in any combination.

The de-emphasis filter (thick line, alternative to treble control)

compensates for pre-emphasis used on some audio CDs.

Gain error < 0.1dB. Filter characteristics at Fs=44.1kHz are plotted

-15

-10

-5

100

10k

Frequency [Hz]

Audio signal transfer function when the Dynamic Compressor is active.

-1

-0.75

-0.5

-0.25

0.25

0.5

0.75

-1 -0.75-0.5-0.25 0 0.25 0.5 0.75 1

Input Amplitude [FS]

48 kHz sample rate.

Full ADC path Frequency response up to 100 kHz.

-80

-70

-60

-50

-40

-30

-20

-10

100

10k

100k

Frequency [Hz]

48 kHz Sample Rate.

In band Frequency response

-0.5

-0.4

-0.3

-0.2

-0.1

0.1

0.2

0.3

0.4

0.5

10k

15k

20k

Frequency [Hz]

DA96K=0; 48 kHz Sample Rate

Frequency response up to 166kHz (3.45 Fs @ 48kHz sampling rate)

-80

-60

-40

-20

100

10k

100k

Frequency [Hz]

48 kHz Sample Rate

In band Frequency response

-0.5

-0.4

-0.3

-0.2

-0.1

0.1

0.2

0.3

0.4

0.5

10k

15k

20k

Frequency [Hz]

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