CS4351-CZZ(2004) Просмотр технического описания (PDF) - Cirrus Logic

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CS4351-CZZ
(Rev.:2004)

192 kHz Stereo DAC with 2 Vrms Line Out

Cirrus Logic 

CS4351

4.4 De-Emphasis Control

The device includes on-chip digital de-emphasis. Figure 8 shows the de-emphasis curve for Fs equal to

44.1 kHz. The frequency response of the de-emphasis curve will scale proportionally with changes in sam-

ple rate, Fs.

Gain

dB

T1=50 µs

0dB

-10dB

T2 = 15 µs

F1

3.183 kHz

F2 Frequency

10.61 kHz

Figure 8. De-Emphasis Curve

Notes: De-emphasis is only available in Single-Speed Mode.

4.4.1 Stand-Alone Mode

When pulled to VL the DEM pin activates the 44.1 kHz de-emphasis filter. When pulled to GND

the DEM pin turns off the de-emphasis filter.

4.4.2 Control Port Mode

The Mode Control bits selects either the 32, 44.1, or 48 kHz de-emphasis filter. Please see section

6.2.2 for the desired de-emphasis control.

DS566PP2

19

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