AK7722 Datasheet, PDF (16/28 Pages) Asahi Kasei Microsystems – 24bit 4ch ADC + 24bit 4ch DAC with Audio DSP

[AK7722]
SWITCHING CHARACTERISTICS
■ System Clock
(Ta=-40ºC~85ºC; AVDD=DVDD=3.0~3.6V, VSS1~VSS6=0V)
Parameter
Symbol
min
XTI CKM[2:0]=000, 001, 010
a) with a Crystal Oscillator:
CKM[2:0]=000 fs=44.1kHz
fXTI
-
fs=48kHz
CKM[2:0]=001 fs=44.1kHz
fXTI
-
fs=48kHz
b) with an External Clock
Duty Cycle
40
CKM[2:0]=000, 010 fs=44.1kHz
fs=48kHz
fXTI
11.0
CKM[2:0]=001 fs=44.1kHz
fs-48kHz
fXTI
16.5
LRCKI Frequency
(Note 28)
fs
7.35
typ
11.2896
12.288
16.9344
18.432
50
11.2896
12.288
16.9344
18.432
max
Unit
-
MHz
-
MHz
60
%
12.4
MHz
18.6
MHz
48
kHz
BICKI Frequency
High Level Width
Low Level Width
Frequency
tBCLKH
64
tBCLKL
64
fBCLK
0.23
3.072
ns
ns
3.1
MHz
Note 28. LRCKI frequency and sampling rate (fs) should be the same.
Note 29. When BICKI is the source of master clock, it should be synchronized to LRCKI and the frequency is stable.
MS1328-E-00-PB
16
2011/09