ASAHI KASEI
[AK4387]
DC CHARACTERISTICS
(Ta=25°C; AVDD=DVDD=4.5
∼
5.5V)
Parameter
High-Level Input Voltage
Low-Level Input Voltage
High-Level Output Voltage (Iout=-80µA)
Low-Level Output Voltage
(Iout=80µA)
Input Leakage Current
Symbol
VIH
VIL
VOH
VOL
Iin
min
2.2
-
AVDD-0.4
-
-
typ
-
-
-
-
max
-
0.8
-
0.4
±
10
Units
V
V
V
V
µA
SWITCHING CHARACTERISTICS
(Ta=25°C; AVDD=DVDD=4.5
∼
5.5V, 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
Normal Speed Mode
tBCK
1/128fs
Double/Quad Speed Mode
tBCK
1/64fs
BICK Pulse Width Low
tBCKL
30
Pulse Width High
tBCKH
30
BICK rising to LRCK Edge
(Note 11)
tBLR
20
LRCK Edge to BICK rising
(Note 11)
tLRB
20
SDTI Hold Time
tSDH
20
SDTI Setup Time
tSDS
20
Control Interface Timing
CCLK Period
tCCK
200
CCLK Pulse Width Low
tCCKL
80
Pulse Width High
tCCKH
80
CDTI Setup Time
tCDS
40
CDTI Hold Time
tCDH
40
CSN “H” Time
tCSW
150
tCSS
50
CSN “↓” to CCLK “↑”
tCSH
50
CCLK “↑” to CSN “↑”
Reset Timing
RSTN Pulse Width
(Note 12)
tPD
150
Note 11. BICK rising edge must not occur at the same time as LRCK edge.
Note 12. The AK4387 can be reset by bringing RSTN pin = “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
MS0429-E-00
-5-
2005/09
AKM [ ASAHI KASEI MICROSYSTEMS ]
