ASAHI KASEI
[AK4385]
SWITCHING CHARACTERISTICS
(Ta=25°C; VDD=4.75
∼
5.25V; C
L
=20pF)
Parameter
Symbol
min
typ
fCLK
2.048
11.2896
Master Clock Frequency
Duty Cycle
dCLK
40
LRCK Frequency
Normal Speed Mode
fsn
8
Double Speed Mode
fsd
60
Quad Speed Mode
fsq
120
Duty Cycle
Duty
45
Audio Interface Timing
BICK Period
1/128fs
tBCK
Normal Speed Mode
1/64fs
tBCK
Double/Quad Speed Mode
30
tBCKL
BICK Pulse Width Low
30
tBCKH
Pulse Width High
20
tBLR
BICK rising to LRCK Edge
(Note 12)
20
tLRB
LRCK Edge to BICK rising
(Note 12)
20
tSDH
SDTI Hold Time
20
tSDS
SDTI Setup Time
Control Interface Timing
200
CCLK Period
tCCK
80
CCLK Pulse Width Low
tCCKL
80
Pulse Width High
tCCKH
40
CDTI Setup Time
tCDS
40
CDTI Hold Time
tCDH
150
CSN “H” Time
tCSW
50
tCSS
CSN “↓” to CCLK “↑”
50
tCSH
CCLK “↑” to CSN “↑”
Reset Timing
PDN Pulse Width
(Note 13)
tPD
150
Notes: 12. BICK rising edge must not occur at the same time as LRCK edge.
13. The AK4385 can be reset by bringing PDN= “L”.
max
36.864
60
48
96
192
55
Units
MHz
%
kHz
kHz
kHz
%
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
MS0246-E-00
-6-
2003/07
AKM [ ASAHI KASEI MICROSYSTEMS ]
