AK7735EQ Datasheet, PDF (106/142 Pages) Asahi Kasei Microsystems – Dual DSP with 4chADC + 4chDAC + 4chSRC

[AK7735]
4. DAC De-emphasis Filter Control
The AK7735 has a digital de-emphasis filter (tc=50/15µs) that corresponds to three sampling
frequencies (32kHz, 44.1kHz and 48kHz) by IIR filter. The de-emphasis filter frequency is selected by
DEMx[1:0] bits (x=1, 2) (Table 62).
The de-emphasis filer only corresponds to the frequencies shown in Table 62. DEMx[1:0] bits must be
set to the default setting “01” when the AK7735 is operated with other sampling frequencies.
DEMx[1] bit DEMx[0] bit
Mode
0
0
44.1kHz
0
1
OFF
(default)
1
0
48kHz
1
1
32kHz
Table 62. DAC De-emphasis Filter Control
016014707-E-00
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2016/12