AK4569 Datasheet, PDF (16/45 Pages) Asahi Kasei Microsystems – 20-Bit Stereo CODEC with IPGA & HP-AMP

ASAHI KASEI
[AK4569]
LRCK
0 1 2 15 16 17 18 19 20
BICK(64fs)
SDTO(o)
19 18
4 3 21 0
30 31 0 1 2 15 16 17 18 19 20
19 18
43 210
30 31 0 1
19
SDTI(i)
16bit
SDTI(i)
18bit
SDTI(i)
20bit
15 14
17 16
19 18
0
Don’t Care 15 14
210
Don’t Care 17 16
4 3 2 1 0 Don’t Care
Lch Data
19 18
0
Don’t Care 15
210
Don’t Care 17
4 3 2 1 0 Don’t Care 19
Rch Data
Figure 12. Mode 2 Timing
LRCK
0 1 2 3 16 17 18 19 20 21 30 31 0 1 2 3 16 17 18 19 20 21 30 31 0 1
BICK(64fs)
SDTO(o)
19 18
4 3 21 0
19 18
4 3 21 0
SDTI(i)
16bit
SDTI(i)
18bit
SDTI(i)
20bit
15 14
17 16
19 18
0
Don’t Care 15 14
210
Don’t Care 17 16
4 3 2 1 0 Don’t Care 19 18
0
Don’t Care
210
Don’t Care
4 3 2 1 0 Don’t Care
0 1 2 3 8 9 10 11 12 13 14 15 0 1 2 3 8 9 10 11 12 13 14 15 0 1
BICK(32fs)
SDTO(o)
4 19 18
12 11 10 9 8 7 6 5 4 19 18
12 11 10 9 8 7 6 5 4
SDTI(i)
0 15 14
8 7 6 5 4 3 2 1 0 15 14
8 7 65 43 2 10
Lch Data
Figure 13. Mode 3 Timing
Rch Data
„ Digital High Pass Filter
The AK4569 has a Digital High Pass Filter (HPF) to cancel DC-offsets in the ADC and IPGA. The cut-off frequency of
the HPF is 3.4Hz at fs=44.1kHz. This filter scales with the sampling frequency (fs).
MS0292-E-01
- 16 -
2005/07