AK4522_12 Datasheet, PDF (10/19 Pages) Asahi Kasei Microsystems – 20Bit Stereo ΔΣ ADC & DAC

ASAHI KASEI
[AK4522]
LRCK(i)
012
SCLK(i:64fs)
SDTO(o)
19 18
12 13 14
20 21
876
0
31 0 1 2
12 13 14
20 21
19 18
876
0
31 0 1
19
SDTI(i)
Don’t Care 19 18
12 11
19:MSB, 0:LSB
Lch Data
1 0 Don’t Care
Figure 2. Mode 1 Timing
19 18
12 11
Rch Data
10
LRCK(i)
012
SCLK(i:64fs)
17 18 19 20 21
SDTO(o)
19 18
3 21 0
01 2
17 18 19 20 21
19 18
3210
01
19
SDTI(i)
19 18
3210
Don’t Care
23 22
32 10
Don’t Care 19
19:MSB, 0:LSB
Lch Data
Rch Data
Figure 3. Mode 2 Timing
LRCK(i)
01 23
SCLK(i:32fs)
SDTO(o)
SDTI(i)
4 19 18
01 23
SCLK(i:64fs)
9 10 11 12 13 14 15 0 1 2
12 11 10 9 8 7 6 5 4 19 18
17 18 19 20 21
31 0 1 2 3
9 10 11 12 13 14 15 0 1
12 11 10 9 8 7 6 5 4
17 18 19 20 21
31 0 1
SDTO(o)
19 18
4 32 10
19 18
43 2 10
SDTI(i)
19 18
4 3 2 1 0 Don’t Care 19 18
19:MSB, 0:LSB
Lch Data
Figure 4. Mode 3 Timing
4 3 2 1 0 Don’t Care
Rch Data
„ Digital High Pass Filter
The ADC of AK4522 has a digital high pass filter for DC offset cancel. The cut-off frequency of the HPF is 0.9Hz at
fs=44.1kHz and also scales with sampling rate (fs).
M0020-E-02
- 10 -
2012/01