www.ti.com

15 k

Ω

1 k

Ω

470 pF

9

10

VINL

VREFL

CINPL

CINNL

1

4

Delta-Sigma

Modulator

(+)

VREF

+

2.2

µF

4.7

µF

+

+

−

(−)

+

−

1 k

Ω

S0011-04

PCM AUDIO INTERFACE

PCM3000

PCM3001

SBAS055A – OCTOBER 2000 – REVISED OCTOBER 2004

Figure 17. Analog Front-End (Single-Channel)

The four-wire digital audio interface for the PCM3000/3001 is on LRCIN (pin 16), BCKIN (pin 17), DIN (pin 18),

and DOUT (pin 19). The PCM3000/3001 can operate with seven different data formats. For the PCM3000, these

formats are selected through program register 3 in the software mode. For the PCM3001, data formats are

selected by pin-strapping the three format pins. Figure 18, Figure 19, Figure 20 and Figure 21 illustrate the audio

data input/output format. Figure 22 shows the audio data input/output timing. The PCM3000/3001 can accept 32,

48, or 64 bit clocks (BCKIN) during one clock of LRCIN. Only formats 0, 2, and 6 can be selected when 32 bit

clocks/LRCIN are applied.

17