AK7744VT Datasheet, PDF (12/50 Pages) Asahi Kasei Microsystems – 24bit 3ch ADC + 24bit 4ch DAC with Audio DSP

[ASAHI KASEI]
[AK7744]
(5) Switching characteristics
5-1) System clock
(AVDD=DVDD=3.0V~3.6V,Ta=-40~85°C,CL=20pF)
Parameter
Symbol
min
Master clock (XTI)
a) With a crystal oscillator
512fs: frequency
fMCLK
16.384
1536fs: frequency
2048fs: frequency
3072fs: frequency
b) With a external clock:
Duty factor (≤18.432MHz)
(>18.432MHz)
512fs: frequency
fMCLK
fMCLK
fMCLK
22.5792
24.576
40
45
16
1536fs: frequency
2048fs: frequency
3072fs: frequency
fMCLK
22
fMCLK
24
: High level width
: Low level width
tMCLKH
16
tMCLKL
16
Clock rise time
tCR
Clock fall time
tCF
LRCLK Sampling frequency
fs
32
1536fs: frequency
fs
2048fs: frequency
fs
3072fs: frequency
fs
14.7
11.025
8
Slave mode :clock rise time
tLR
Slave mode :clock fall time
tLF
BITCLK
Note 1) fBCLK
48
Slave mode: High level width
tBCLKH
150
Slave mode: Low level width
tBCLKL
150
Slave mode :clock rise time
tBR
Slave mode :clock fall time
tBF
Note 1) 48fs mode can be use only in slave mode.
5-2) Reset
(AVDD=DVDD=3.0V~3.6V,Ta=-40~85°C,CL=20pF)
Parameter
Symbol
min
INIT_RESET
Note 1) ^tRST
150
S_RESET
tRST
150
typ
24.576
24.576
24.576
50
50
24.576
24.576
24.576
48
16
12
8
1
64
typ
max
Unit
24.576
24.576
24.576
60
55
25
25
25
6
6
49
16.3
12.2
8.1
6
6
6
6
MHz
MHz
MHz
%
MHz
MHz
MHz
ns
ns
ns
ns
kHz
kHz
kHz
kHz
fs
ns
ns
fs
ns
ns
ns
ns
max
Unit
ns
ns
Note 1) “L” is acceptable when power is turned on, but ”H” needs a stable master clock input.
<MS0167-E-00>
- 12 -
2002/10