AK5388EQ AKM [Asahi Kasei Microsystems], AK5388EQ Datasheet - Page 22

• Manufacturer Part Number: AK5388EQ
• Description: 120dB 24-bit 192kHz 4-Channel ADC
• Manufacturer: AKM [Asahi Kasei Microsystems]

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The AK5388 supports cascading of up to two devices in a daisy chain configuration in TDM256 mode. In this mode,
SDTO1 pin of device #1 is connected to TDMIN pin of device #2. The SDTO1 pin of device #2 can output 8-chnnels of
TDM data multiplexed with 4-chnnel of TDM data from device #1 and 4-channel of TDM data from device #2.
shows a connection example of a daisy chain.
When using two AK5388’s in slave mode by cascade connection, the internal timing between device #1 and #2 may differ
for 1MCLK clock cycle. BICK falling edge must me more than ±10ns from a MICK rising edge to prevent this phase
difference between two devices.
BICK must be divided by two on a MCLK falling edge
Double speed 256fs mode), and BICK must be in-phase signal to MCLK
speed 256fs mode or Quad speed 128fs mode) to achieve this internal timing synchronization.
MS1096-E-01
Cascade TDM Mode
LRCK
BICK(256fs)
#1 SDTO1(o)
#1 SDTO2(o)
#2 TDMIN(i)
#2 SDTO1(o)
23
23
23
23
AK5388 #1
AK5388 #2
32 BICK
32 BICK
32 BICK
32 BICK
22
22
22
22
(Table
L1
L1
L1
L1
0
0
0
0
Figure 17. Cascade TDM Connection Diagram
23
23
23
23
6)
32 BICK
32 BICK
32 BICK
32 BICK
22
22
22
22
R1
R1
R1
R1
Figure 18. Cascade TDM Timing
0
0
0
0
SDTO1
SDTO2
SDTO1
SDTO2
TDMIN
TDMIN
23
23
23
23
MCLK
MCLK
LRCK
LRCK
32 BICK
32 BICK
32 BICK
32 BICK
BICK
BICK
22
22
22
22
L2
L2
L2
L2
0
0
0
0
(Figure
23
23
23
23
- 22 -
32 BICK
32 BICK
32 BICK
32 BICK
22
22
22
22
R2
R2
R2
R2
GND
19) when MCLK=2 x BICK (Normal speed 512fs mode or
256 BICK
0
0
0
0
23
32 BICK
22
L1-#1
0
(Figure
23
32 BICK
22
R1-#1
8ch TDM
256fs or 512fs
48kHz
256fs
0
20) when MCLK = BICK (Normal
23
32 BICK
22
L2-#1
0
23
32 BICK
22
R2-#1
0
23
23
22
22
[AK5388]
Figure 17
2009/08