AK4640_05 AKM [Asahi Kasei Microsystems], AK4640_05 Datasheet - Page 28

• Manufacturer Part Number: AK4640_05
• Description: 16-Bit ?? CODEC with MIC/HP/SPK-AMP
• Manufacturer: AKM [Asahi Kasei Microsystems]

ASAHI KASEI
The ADC has a digital high pass filter for DC offset cancellation. The cut-off frequency of the HPF is 3.4Hz
(@fs=44.1kHz) and scales with sampling rate (fs).
MS0273-E-02
Digital High Pass Filter
LRCK
BICK(32fs)
SDTO(o)
BICK(64fs)
SDTO(o)
LRCK
BICK(32fs)
SDTO(o)
BICK(64fs)
SDTO(o)
SDTI(i)
SDTI(i)
SDTI(i)
SDTI(i)
0
0 1
0
0 1
15 14
15 14
15 14 13
15 14
15:MSB, 0:LSB
0
1
1
15 14
15 14
15 14
15
15:MSB, 0:LSB
2 3
2 3
2 3
2 3
14
13
13
13
Lch Data
Lch Data
8
8
2
2 1
7
7 6 5 4 3 2 1 0
1
1 0
15
15
9
9
7
7 6 5 4 3 2 1 0
1
6 5 4 3
0
10
16
Figure 17. Mode 1 Timing
Figure 18. Mode 2 Timing
10
16
6 5 4 3
0
0
11 12 13 14 15 0 1 2 3
17 18
11 12 13 14 15 0 1 2 3
17 18
Don't Care
Don't Care
- 28 -
2
2
1 0
31 0 1 2 3
31 0 1 2 3
1 0
15 14 13
15
15 14
15
14
14
13
Rch Data
8
2 1
Rch Data
7 6 5 4 3 2 1 0
1 0
15
15
9
9
7 6 5 4 3 2 1 0
10
16 17 18
10
16 17 18
0
11 12 13 14 15
11 12 13 14 15
Don't Care
Don't Care
31
31
0
0
0
0
15
15
15
15
1
1
1
1
[AK4640]
2005/04