AK7719 Datasheet, PDF (8/16 Pages) Asahi Kasei Microsystems – Low Power DSP for Voice and Audio Processing

[AK7719]
SWITCHING CHARACTERISTICS
■ System Clock
(Ta= -20ºC ~ 85ºC, VDD=1.2V, TVDD= 1.6V ~ 3.6V, VSS=0V) CL=20pF (except SDA pin) or 400pF (SDA pin);
unless otherwise specified
Parameter
Symbol
min
typ
max
Unit
Normal Operation mode: SYNC1/3, BCLK1/BCLK3 Input Timing
SYNC1/3 Input Timing
SYNC1/3 frequency
fs
8
48
kHz
BCLK1 Input Timing (Note 8, Note 9)
fBCLK
64
3072
kHz
BCLK1/3 Pulse width Low
tBCKL 0.4 x tBCLK
ns
BCLK1/3 Pulse width High
tBCKH _{0.4x tBCLK}
ns
Note 8. SYNC1 and BCLK1 or SYNC3 and BCLK3 should be synchronized and their sampling rates (fs) should be stable
Note 9. Required fBCLK: ≥ 2 (Data length set by LAW bit) x SYNC2 frequency
■ Reset and Standby
(Ta= -20ºC ~ 85ºC, VDD=1.2V, TVDD= 1.6V ~ 3.6V, VSS=0V)
Parameter
Symbol
min
typ
PDN
(Note 10)
tPDN
600
Note 10. The AK7719 can be reset by bringing the PDN pin = “L” upon power-up.
max
Unit
ns
■ Serial Data Interface
(Ta= -20ºC ~ 85ºC, TVDD= 1.6V ~ 3.6V, VSS=0V, CL=20pF)
Parameter
Symbols
SDIN1, SDIN3, SDIN4, SDOUT1, SDOUT3, SDOUT4
Delay Time from BCLK1 “↑” to SYNC1 “↑”
(Note 11) tBSYD
Delay Time from SYNC1 “↓” to BCLK1 “↑”
tSYBD
Serial Data Input Latch Setup Time
tB1IDS
Serial Data Input Latch Hold Time
tB1IDH
Delay Time from SYNC1 to Serial Data Output
tSY1OD
Delay Time from BCLK1 “↓” to Serial Data Output (Note 12) tB1OD
SDIN2, SDOUT2
SYNC2 Duty cycle
Serial Data Input Latch Setup Time
tB2IDS
Serial Data Input Latch Hold Time
tB2IDH
Delay Time from SYNC2 to Serial Data Outputs
tSY2OD
Delay Time from BCLK2 “↓”to Serial Data Output (Note 13) tB2OD
SDINn → SDOUTn (n=1, 2, 3)
Delay time from SDINn to SDOUTn Output
tIOD
Note 11. When the polarity of BCLK1 is inverted, delay time is from BCLK1 “↓”
Note 12. When the polarity of BCLK1 is inverted, delay time is from BCLK1 “↑”.
Note 13. When the polarity of BCLK2 is inverted, delay time is from BCLK2 “↑”.
min typ max Unit
20
ns
100
ns
40
ns
40
ns
40
ns
40
ns
50
%
40
ns
40
ns
40
ns
40
ns
60
ns
MS1351-E-00-PB
8
2012/01