Professional Audio
High-Performance, 24-Bit, 216-kHz,
4- and 8-Channel Audio DACs
PCM4104, PCM4108
Get samples, datasheets, evaluation modules and app reports at:
or
57
Industry’s Highest-Performance Audio DAC
PCM1792, PCM1794
Get samples, datasheets and app reports at:
or
The PCM4104 and PCM4108 are high-performance, 4- and 8-channel
DACs designed for professional audio systems supporting 24-bit linear
PCM data and sampling frequencies up to 192 kHz. An 8x oversampling
digital interpolation filter and multilevel, delta-sigma modulator with
switched capacitor output filter provide for excellent dynamic and sonic
performance as well as high tolerance to system clock phase jitter.
Key Features
• Accepts 16- to 24-bit PCM audio data
• Sampling rates up to 216 kHz (4108)
• Dynamic range: 118 dB
• THD+N: –100 dB
• Differential voltage outputs
• Stand-alone or software-controlled configuration
• TDM format allows easy interface to DSP serial ports
• +3.3- or +5-V supply
• Packaging: 48-lead TQFP and 64-lead HTQFP
Applications
• Professional mixing consoles
• Broadcast studio equipment
• AV receivers and DVD players
The PCM1792/4 utilizes TI’s advanced segment DAC architecture to
achieve unparalleled dynamic performance and improved tolerance to
clock jitter. The PCM1792/4 provides balanced current outputs, allow-
ing the user to optimize analog performance externally.
Key Features
• Analog performance:
•
Dynamic range: 126 dB (typ)
•
THD+N: 0.0003% (typ)
•
Full-scale output: 2 V rms (at post amp)
• 8x oversampling digital filter:
•
Stop-band attenuation: –130 dB
•
Pass-band ripple: ±0.00001 dB
• Sampling frequency: 10 to 200 kHz
• 24-bit resolution
• System clock: 128, 192, 256, 384, 512 or 768 f
S
with auto detect
• Accepts 16-, 20- and 24-bit audio data
• PCM data formats: standard, I
2
S and left justified
• DSD format interface available
• Optional interface to external digital filter or DSP available
• TDMCA or serial port (SPI/I
2
C)
Applications
• AV receivers
• SACD players
• DVD audio players
• HDTV receivers
• Car audio systems
• Digital multitrack recorders
I/V and Filter
VOUTL
I
OUT
L+
V
OUT
1+
V
OUT
1–
V
REF
1+
V
REF
1–
V
REF
2–
V
REF
2+
V
COM
1
V
OUT
2+
V
OUT
2–
V
OUT
3+
V
OUT
3–
V
REF
3+
V
REF
3–
V
REF
4–
V
REF
4+
V
COM
2
V
OUT
4+
V
OUT
4–
Delta-Sigma
Modulator
Output
Filters
and
References
Delta-Sigma
Modulator
Digital
Filtering
and
Attenuation
Audio
Serial
Port
LRC
BCK
DATA
0
DATA
1
SUB
I
OUT
L–
Output
Filters
and
References
Delta-Sigma
Modulator
Control
Logic
Delta-Sigma
Modulator
MODE = 1
RST
Fs
0
Fs
1
FMT
0
FMT
1
FMT
2
DEM
0
DEM
1
MUTE
LRCK
BCK
DATA
RST
MDO
MDI
MC
MS
MSEL
Function
Control
I/F
Audio
Data
Input
I/F
Current
Segment
DAC
8X
Over-
Sampling
Digital
Filter
and
Function
Control
Advanced
Segmented
DAC
Modulator
Bias
and
V
REF
V
COM
L
I
REF
V
COM
R
I
OUT
R–
I/V and Filter
VOUTR
I
OUTR+
Current
Segment
DAC
To Other Blocks
Clock
Generation
SCKI
ZEROL
ZEROR
Zero
Detect
System
Clock
Manager
Power Supply
SCK
PCM1792 block diagram.
Texas Instruments 1Q 2006
DGND
V
DD
AGNDF
V
CC
F
AGNDC
V
CC
C
AGNDR
V
CC
R
AGNDL
V
CC
L
PCM4104 block diagram.
Audio Solutions Guide
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