The PCM1681 and PCM1681-Q1 are CMOS monolithic integrated circuits which feature an eight-channel 24-bit audio digital-to-analog converter (DAC) and support circuitry in small 28-lead TSSOP PowerPAD packages

PCM1681

Manufacturer Part NumberPCM1681
DescriptionThe PCM1681 and PCM1681-Q1 are CMOS monolithic integrated circuits which feature an eight-channel 24-bit audio digital-to-analog converter (DAC) and support circuitry in small 28-lead TSSOP PowerPAD packages
ManufacturerTexas Instruments
PCM1681 datasheet
 


Specifications of PCM1681

# Dacs8# Inputs / # Outputs0 / 8
ArchitectureCurrent Segment DACResolution(bits)24
Sampling Rate(max)(khz)200Control InterfaceSPI, I2C,H/W
Digital Audio InterfaceL,R,I2S,TDM,DSPThd+n(typ)(%)0.002
Dac Snr(typ)(db)105Power Consumption(typ)(mw)386
Operating Temperature Range(c)-40 to 85Analog Voltage Av/dd(min)(v)4.5
Analog Voltage Av/dd(max)(v)5.5Pin/package28HTSSOP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Page 21
22
Page 22
23
Page 23
24
Page 24
25
Page 25
26
Page 26
27
Page 27
28
Page 28
29
Page 29
30
Page 30
31
32
33
34
35
36
37
38
39
40
41
42
43
Page 30/43

Download datasheet (2Mb)Embed
PrevNext
PCM1681
PCM1681-Q1
SLES211B – FEBRUARY 2008 – REVISED JUNE
2008....................................................................................................................................................
DMF[1:0]: Sampling Frequency Selection for the De-Emphasis Function
Default value: 00b
DMF[1:0] De-Emphasis Sampling Rate Selection
00
44.1 kHz (default)
01
48 kHz
10
32 kHz
11
Reserved
The DMF[1:0] bits select the sampling frequency used for the digital de-emphasis function when it is enabled.
The de-emphasis curves are shown in the
shows the available sampling frequencies.
DMC: Digital De-Emphasis All-Channel Function Control
Default value: 0
DMC = 0
De-emphasis disabled for all channels (default)
DMC = 1
De-emphasis enabled for all channels
The DMC bit is used to enable or disable the de-emphasis function for all channels.
B15
B14
B13
B12
REGISTER 11
0
IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 REV8
REV[8:1]: Output Phase Select per Channel
Where x = 1 – 8, corresponding to the DAC output V
REVx = 0
Normal output
REVx = 1
Inverted output (default)
The REVx bit allows the user to select the phase of the analog output signal per channel when DREV = 1 is set
on Register 10 .
B15
B14
B13
B12
REGISTER 12
0
IDX6 IDX5 IDX4 IDX3 IDX2 IDX1 IDX0 OVER
OVER: Oversampling Rate Control
Default value: 0
OVER
512 f
, 768 f
, 1152 f
S
S
S
OVER = 0
×64 oversampling, narrow
mode (default)
OVER = 1
×128 oversampling, wide
mode
FLTx: Digital Filter Roll-Off Control per DATA Group
Where x = 1 – 4, corresponding to the DATAx. Default value: 1
FLTx = 0
Sharp roll-off
FLTx = 1
Slow roll-off (default)
The FLTx bit allows the user to select the digital filter roll-off characteristic per 2 channels when FLT = 1 is set,
so that it is best suited to the application. Two filter roll-off sections are available: sharp or slow. The filter
responses for these selections are shown in the
30
Submit Documentation Feedback
Typical Characteristics
section of this data sheet. The preceding table
B11
B10
B9
B8
B7
B6
REV7
x. Default value: 1
OUT
B11
B10
B9
B8
B7
B6
RSV
256 f
, 384 f
128 f
, 192 f
S
S
S
×32 oversampling, narrow
×16 oversampling, narrow
mode (default)
mode (default)
×64 oversampling, wide mode ×32 oversampling, wide
mode
Typical Characteristics
Product Folder Link(s):
PCM1681 PCM1681-Q1
www.ti.com
B5
B4
B3
B2
B1
REV6
REV5
REV4
REV3
REV2
B5
B4
B3
B2
B1
RSV
RSV
FLT4 FLT3 FLT2 FLT1
S
section.
Copyright © 2008, Texas Instruments Incorporated
B0
REV1
B0