AK4388A AKM [Asahi Kasei Microsystems], AK4388A Datasheet - Page 8

• Manufacturer Part Number: AK4388A
• Description: 192kHz 24-Bit 2ch ?? DAC
• Manufacturer: AKM [Asahi Kasei Microsystems]

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The external clocks, which are required to operate the AK4388A, are MCLK, LRCK and BICK. The master clock
(MCLK) should be synchronized with LRCK but the phase is not critical. The MCLK is used to operate the digital
interpolation filter and the delta-sigma modulator. There are two methods to set MCLK frequency. In Manual Setting
Mode (ACKS pin = “L”, Normal Speed Mode), the frequency of MCLK is set automatically
Mode (ACKS pin = “H”), as MCLK frequency is detected automatically
the appropriate frequency
When MCLK= 256fs/384fs, the Auto Setting Mode supports sampling rate of 32kHz~96kHz
sampling rate is 32kHz~48kHz, DR and S/N will degrade by approximately 3dB as compared to when MCLK=
512fs/768fs.
MS1008-E-02
System Clock
32.0kHz
44.1kHz
48.0kHz
LRCK
176.4kHz
192.0kHz
32.0kHz
44.1kHz
48.0kHz
88.2kHz
96.0kHz
fs
Table 1. System Clock Example (Manual Setting Mode, ACKS pin = “L”, Normal Speed Mode)
LRCK
fs
11.2896MHz 16.9344MHz 22.5792MHz 33.8688MHz
12.2880MHz 18.4320MHz 24.5760MHz 36.8640MHz
8.1920MHz 12.2880MHz 16.3840MHz 24.5760MHz
Table 4. Relationship between MCLK frequency and DR, S/N (fs= 44.1kHz)
256fs
Table 3. System Clock Example (Auto Setting Mode, ACKS pin = “H”)
22.5792
24.5760
128fs
(Table
Table 2. Sampling Speed (Auto Setting Mode, ACKS pin = “H”)
-
-
-
-
-
512fs
256fs
128fs
ACKS pin
3).
MCLK
1152fs
L
H
H
33.8688
36.8640
192fs
384fs
-
-
-
-
-
OPERATION OVERVIEW
768fs
384fs
192fs
256fs/384fs/512fs/768fs
11.2896
12.2880
22.5792
24.5760
8.1920
256fs
-
-
MCLK
256fs/384fs
512fs/768fs
512fs
MCLK
- 8 -
Normal
Normal
Double
MCLK (MHz)
Mode
Quad
12.2880
16.9344
18.4320
33.8688
36.8640
384fs
-
-
768fs
(Table
16.3840
22.5792
24.5760
120kHz~192kHz
512fs
Sampling Rate
32kHz~96kHz
8kHz~32kHz
8kHz~48kHz
2), and the internal master clock becomes
-
-
-
-
DR,S/N
106dB
103dB
106dB
36.8640MHz
1152fs
N/A
N/A
24.5760
33.8688
36.8640
768fs
-
-
-
-
(Table
(Table
2.0480MHz
2.8224MHz
3.0720MHz
1). In Auto Setting
36.8640
1152fs
BICK
64fs
-
-
-
-
-
-
2). When the
[AK4388A]
2010/09