AK4425A AKM [Asahi Kasei Microsystems], AK4425A Datasheet - Page 11

• Manufacturer Part Number: AK4425A
• Description: 192kHz 24-Bit Stereo ?? DAC with 2Vrms Output
• Manufacturer: AKM [Asahi Kasei Microsystems]

DFS1
■
The external clocks required to operate the AK4425A 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. 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 = “0”: Register 00H), the sampling speed is set
by DFS0/1
applied, the AK4425A is in Auto Setting Mode. In Auto Setting Mode (ACKS = “1”: Default), as MCLK frequency is
detected automatically
necessary to set DFS0/1.
The AK4425A is automatically placed in power saving mode when MCLK, LRCK and BICK stop during normal
operation mode, and the analog output is forced to 0V(typ). When MCLK, LRCK and BICK are input again, the
AK4425A is powered up. After power-up, the AK4425A is in the power-down mode until MCLK, LRCK and BICK are
input.
MS1127-E-01
0
0
0
0
0
1
1
System Clock
DFS0
0
0
0
1
1
0
0
(Table
Sampling
Normal
Double
Speed
Quad
1). The frequency of MCLK at each sampling speed is set automatically.
(Table
DFS1
LRCK
(kHz)
176.4
192.0
32.0
44.1
48.0
88.2
96.0
0
0
1
3), and the internal master clock becomes the appropriate frequency
fs
Table 3. Sampling Speed(Auto Setting Mode: Default)
Table 1. Sampling Speed (Manual Setting Mode)
512fs
256fs
128fs
DFS0
11.2896
12.2880
22.5792
24.5760
128fs
0
1
0
MCLK
1152fs
-
-
-
Table 2. System Clock Example
OPERATION OVERVIEW
768fs
384fs
192fs
16.9344
18.4320
33.8688
36.8640
Normal Speed Mode
Double Speed Mode
Quad Speed Mode
192fs
-
-
-
- 11 -
11.2896
12.2880
22.5792
24.5760
8.1920
Normal (fs=32kHz only)
256fs
Sampling Rate (fs)
-
-
Sampling Speed
MCLK (MHz)
Normal
Double
Quad
12.2880
16.9344
18.4320
33.8688
36.8640
384fs
-
-
120kHz~192kHz
60kHz~96kHz
8kHz~48kHz
16.3840
22.5792
24.5760
512fs
-
-
-
-
(Table
24.5760
33.8688
36.8640
768fs
-
-
-
-
(default)
(Table
2) When the power
36.8640
1152fs
4), it is not
-
-
-
-
-
-
[AK4425A]
2011/03
11.2896
12.2880
(MHz)
2.0480
2.8224
3.0720
5.6448
6.1440
BICK
64fs