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
Input Leakage Current
Symbol
VIH
VIL
VOH
VOL
Iin
min
2.2
-
typ
max
-
0.8
-
Units
V
V
V
V
-
-
-
AVDD-0.4
(Iout=80µA)
-
-
0.4
-
µA
10
±
SWITCHING CHARACTERISTICS
(Ta=25 C; AVDD=DVDD=4.5 5.5V, C = 20pF)
°
∼
L
Parameter
Master Clock Frequency
Symbol
fCLK
dCLK
min
2.048
40
typ
11.2896
max
36.864
60
Units
MHz
%
Duty Cycle
LRCK Frequency
Normal Speed Mode
Double Speed Mode
Quad Speed Mode
fsn
fsd
8
48
96
kHz
kHz
kHz
%
60
fsq
120
45
192
55
Duty Cycle
Audio Interface Timing
BICK Period
Duty
Normal Speed Mode
Double/Quad Speed Mode
BICK Pulse Width Low
Pulse Width High
BICK rising to LRCK Edge
LRCK Edge to BICK rising
SDTI Hold Time
tBCK
tBCK
tBCKL
tBCKH
tBLR
tLRB
tSDH
tSDS
1/128fs
1/64fs
30
30
20
20
20
20
ns
ns
ns
ns
ns
ns
ns
ns
(Note 11)
(Note 11)
SDTI Setup Time
Control Interface Timing
CCLK Period
tCCK
tCCKL
tCCKH
tCDS
tCDH
tCSW
tCSS
200
80
80
40
40
150
50
50
ns
ns
ns
ns
ns
ns
ns
ns
CCLK Pulse Width Low
Pulse Width High
CDTI Setup Time
CDTI Hold Time
CSN “H” Time
CSN “ ” to CCLK “ ”
↓
↑
tCSH
CCLK “ ” to CSN “ ”
↑
↑
Reset Timing
RSTN Pulse Width
(Note 12)
tPD
150
ns
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”.
MS0429-E-00
2005/09
- 5 -
AKM [ ASAHI KASEI MICROSYSTEMS ]
