PCM1741 Datasheet, PDF (13/22 Pages) Burr-Brown (TI) – +3.3V Single-Supply, 24-Bit, 96kHz Sampling Enhanced Multilevel, Delta-Sigma, Audio DIGITAL-TO-ANALOG CONVERTER

REGISTER 19
B15 B14 B13 B12 B11 B10
B9
B8
B7
B6
B5
B4
B3
B2
B1 B0
0
IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 RSV DMF1 DMF0 DM12 RSV RSV DAC2 DAC1
DACx
DAC Operation Control
where x = 1 or 2, corresponding to the DAC output V_OUTL (x = 1) or V_OUTR (x = 2).
Default Value: 0
DACx = 0
DACx = 1
DAC Operation Enabled (default)
DAC Operation Disabled
DM12
The DAC operation controls are used to enable and disable the DAC outputs, V_OUTL and V_OUTR. When
DACx = 0, the corresponding output will generate the audio waveform dictated by the data present on the
DATA pin. When DACx = 1, the corresponding output will be set to the bipolar zero level, or V_CC/2.
Digital De-Emphasis Function Control
Default Value: 0
DM12 = 0
DM12 = 1
De-Emphasis Disabled (default)
De-Emphasis Enabled
DMF[1:0]
The DM12 bit is used to enable or disable the Digital De-Emphasis function. Refer to the Typical Performance
Curves of this data sheet for more information.
Sampling Frequency Selection for the De-Emphasis Function
Default Value: 00
DMF[1:0]
00
01
10
11
De-Emphasis Same Rate Selection
44.1kHz (default)
48kHz
32kHz
Reserved
The DMF[1:0] bits are used to select the sampling frequency used for the Digital De-Emphasis function when
it is enabled.
REGISTER 20
B15 B14 B13 B12 B11 B10
B9
B8
B7
B6
B5
B4
B3
B2
B1 B0
0
IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 RSV RSV FLT RSV RSV FMT2 FMT1 FMT0
FMT[2:0]
Audio Interface Data Format
Default Value: 101
The FMT[2:0] bits are used to select the data format for the serial audio interface. The following table shows
the available format options.
FMT[2:0]
000
001
010
011
100
101
110
111
Audio Data Format Selection
24-Bit Standard Format, Right-Justified Data
20-Bit Standard Format, Right-Justified Data
18-Bit Standard Format, Right-Justified Data
16-Bit Standard Format, Right-Justified Data
I²S Format, 16- to 24-bits
Left-Justified Format, 16- to 24-Bits (default)
Reserved
Reserved
PCM1741
13
SBAS175