PCM1733 Datasheet, PDF (6/9 Pages) Burr-Brown (TI) – Stereo Audio DIGITAL-TO-ANALOG CONVERTER 18 Bits, 96kHz Sampling

LRCIN (pin 1)
BCKIN (pin 3)
AUDIO DATA WORD = 18-BIT
DIN (pin 2) 16 17 18
L_ch
123
MSB
FIGURE 1. “Normal” Data Input Timing.
1/fs
16 17 18
LSB
LRCIN (pin 1)
BCKIN (pin 3)
AUDIO DATA WORD = 18-BIT
DIN (pin 2)
123
MSB
FIGURE 2. “I²S” Data Input Timing.
L_ch
16 17 18
LSB
1/fs
123
MSB
R_ch
123
MSB
16 17 18
LSB
R_ch
16 17 18
LSB
12
LRCKIN
t_BCH
t_BCL
t_LB
BCKIN
t_BCY
t_BL
DIN
t_DS
t_DH
1.4V
1.4V
1.4V
BCKIN Pulse Cycle Time
BCKIN Pulse Width High
BCKIN Pulse Width Low
BCKIN Rising Edge to LRCIN Edge
LRCIN Edge to BCKIN Rising Edge
DIN Set-up Time
DIN Hold Time
: t_BCY
: t_BCH
: t_BCL
: t_BL
: t_LB
: t_DS
: t_DH
: 100ns (min)
: 50ns (min)
: 50ns (min)
: 30ns (min)
: 30ns (min)
: 30ns (min)
: 30ns (min)
FIGURE 3. Audio Data Input Timing.
SCKI
t_SCKIH
t_SCKIL
2.0V
0.8V
System Clock Pulse Width High
System Clock Pulse Width Low
t_SCKIH
t_SCKIL
13ns (min)
13ns (min)
FIGURE 4. System Clock Timing Requirements.
SYSTEM CLOCK
The system clock for PCM1733 must be either 256f_S or
384f_S, where f_S is the audio sampling frequency (LRCIN),
typically 32kHz, 44.1kHz or 48kHz. The system clock is
used to operate the digital filter and the noise shaper. The
system clock input (SCKI) is at pin 14. Timing conditions
for SCKI are shown in Figure 4.
®
PCM1733
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