AK4371VN AKM [Asahi Kasei Microsystems], AK4371VN Datasheet - Page 25

• Manufacturer Part Number: AK4371VN
• Description: DAC with built-in PLL & HP-AMP
• Manufacturer: AKM [Asahi Kasei Microsystems]

For low sampling rates, DR and S/N degrade because of the out-of-band noise. DR and S/N are improved by using higher
frequency for MCKI. Table 15 shows DR and S/N when the DAC output is to the HP-amp.
MS0596-E-00
Others
Mode
10
12
13
0
1
2
4
5
6
8
9
MCKI
pin
MCKO
pin
BICK
pin
LRCK
pin
MCKI pin
MCKO pin MCKO bit = “0”: “L”
BICK pin
LRCK pin
Table 11. Relationship between Sampling Frequency and MCKI Frequency (EXT mode)
Table 15. Relationship between MCKI frequency and DR (and S/N) of HP-amp (2.4V)
FS3
0
0
0
0
0
0
1
1
1
1
1
Power Up (PMDAC bit = “1”)
Refer to Table 11
MCKO bit = “0”: “L”
MCKO bit = “1”: Output
BF bit = “1”: 64fs output
BF bit = “0”: 32fs output
Output
Refer to Table 11
Input
Power Up (PMDAC bit = “1”)
MCKO bit = “1”: Output
Input
Table 12. MCKO frequency (EXT mode, MCKO bit = “1”)
Others
Table 13. Clock Operation in Master mode (EXT mode)
FS2
Table 14. Clock Operation in Slave mode (EXT mode)
256fs/384fs/512fs
0
0
0
1
1
1
0
0
0
1
1
768fs/1024fs
MCKI
PS1
0
0
1
1
FS1
0
0
1
0
0
1
0
0
1
0
0
PS0
Master Mode (M/S bit = “1”)
0
1
0
1
Slave Mode (M/S bit = “0”)
DR, S/N (BW=20kHz, A-weight)
FS0
0
1
0
0
1
0
0
1
0
0
1
fs=8kHz
56dB
75dB
- 25 -
MCKO
256fs
128fs
64fs
32fs
8kHz ∼ 48kHz
8kHz ∼ 48kHz
8kHz ∼ 24kHz
8kHz ∼ 48kHz
8kHz ∼ 48kHz
8kHz ∼ 24kHz
8kHz ∼ 48kHz
8kHz ∼ 48kHz
8kHz ∼ 24kHz
8kHz ∼ 48kHz
8kHz ∼ 24kHz
Power Down (PMDAC bit = “0”)
Input or
fixed to “L” or “H” externally
“L”
“L”
“L”
Power Down (PMDAC bit = “0”)
Input or
fixed to “L” or “H” externally
“L”
Fixed to “L” or “H” externally
Fixed to “L” or “H” externally
N/A
fs
(default)
fs=16kHz
75dB
90dB
1024fs
1024fs
1024fs
MCKI
256fs
512fs
256fs
512fs
256fs
512fs
384fs
768fs
N/A
(default)
[AK4371]
2007/04