Datasheet

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BCK
LRCK
DOUT
t
(BCKH)
t
(BCKL)
t
(CKLR)
t
(LRCP)
t
(BCKP)
t
(CKDO)
t
(LRDO)
0.5 V
DD
0.5 V
DD
0.5 V
DD
T0018-02
PCM1850A
PCM1851A
SLES173 – MARCH 2006
SYMBOL PARAMETER MIN TYP MAX UNIT
t
(BCKP)
BCK period 150 1/(64 f
S
) 1000 ns
t
(BCKH)
BCK pulse duration, HIGH 60 0.5 t
(BCKP)
400 ns
t
(BCKL)
BCK pulse duration, LOW 60 0.5 t
(BCKP)
400 ns
t
(CKLR)
Delay time, BCK falling edge to LRCK valid –10 20 ns
t
(LRCP)
LRCK period 10 1/f
S
60 µ s
t
(CKDO)
Delay time, BCK falling edge to DOUT valid –10 20 ns
t
(LRDO)
Delay time, LRCK edge to DOUT valid –10 20 ns
t
r
Rise time of all signals 10 ns
t
f
Fall time of all signals 10 ns
NOTE: Timing measurement reference level is 0.5 V
DD
. Rise and fall times are measured from 10% to 90% of IN/OUT signal swing. Load
capacitance of all signals is 20 pF.
Figure 25. Audio Data Interface Timing (Master Mode: LRCK, BCK Work as Outputs)
21
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