Burr Brown Products
from Texas Instruments
PCM1791A
SLES071A − MARCH 2003 − REVISED JANUARY 2004
24 BIT, 192 kHz SAMPLING, ADVANCED SEGMENT,
AUDIO STEREO DIGITAL TO ANALOG CONVERTER
FEATURES
D
24-Bit Resolution
D
Analog Performance:
− Dynamic Range: 113 dB
− THD+N: 0.001%
− Full-Scale Output: 2.1 V RMS (at Postamp)
Differential Voltage Output: 3.2 Vp-p
8× Oversampling Digital Filter:
− Stop-Band Attenuation: –82 dB
− Pass-Band Ripple:
±0.002
dB
Sampling Frequency: 10 kHz to 200 kHz
System Clock: 128, 192, 256, 384, 512, or
768 f
S
With Autodetect
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)
User-Programmable Mode Controls:
− Digital Attenuation: 0 dB to –120 dB,
0.5 dB/Step
− Digital De-Emphasis
− Digital Filter Rolloff: Sharp or Slow
− Soft Mute
− Zero Flag for Each Output/PCM and DSD
Formats
Dual Supply Operation:
− 5-V Analog, 3.3-V Digital
D
5-V Tolerant Digital Inputs
D
Small 28-Lead SSOP Package, Lead-Free
Product
D
D
D
D
D
D
D
D
D
D
APPLICATIONS
D
A/V Receivers
D
SACD Players
D
DVD Players
D
HDTV Receivers
D
Car Audio Systems
D
Digital Multitrack Recorders
D
Other Applications Requiring 24-Bit Audio
DESCRIPTION
The PCM1791A is a monolithic CMOS integrated circuit
that includes stereo digital-to-analog converters and
support circuitry in a small 28-lead SSOP package. The
data converters use TI’s advanced segment DAC
architecture to achieve excellent dynamic performance
and improved tolerance to clock jitter. The PCM1791A
provides balanced voltage outputs, allowing the user to
optimize analog performance externally. The PCM1791A
accepts PCM and DSD audio data formats, providing easy
interfacing to audio DSP and decoder chips. The
PCM1791A also accepts interface to external digital filter
devices (DF1704, DF1706, PMD200). Sampling rates up
to 200 kHz are supported. A full set of user-programmable
functions is accessible through an SPI or I
2
C serial control
port, which supports register write and readback functions.
The PCM1791A also supports the time-division-
multiplexed command and audio (TDMCA) data format.
D
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate
precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to
damage because very small parametric changes could cause the device not to meet its published specifications.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright
2004, Texas Instruments Incorporated
PCM1791A
www.ti.com
SLES071A − MARCH 2003 − REVISED JANUARY 2004
ORDERING INFORMATION
PRODUCT
PACKAGE
PACKAGE CODE
OPERATION
TEMPERATURE
RANGE
−25°C to 85°C
PACKAGE
MARKING
PCM1791A
ORDERING
NUMBER
PCM1791ADB
PCM1791ADB
28-lead SSOP
28DB
PCM1791ADBR
TRANSPORT
MEDIA
Tube
Tape and reel
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range unless otherwise noted(1)
PCM1791A
Supply voltage
VCCF, VCCL, VCCC, VCCR
VDD
−0.3 V to 6.5 V
−0.3 V to 4 V
±0.1
V
±0.1
V
–0.3 V to 6.5 V
–0.3 V to (VDD + 0.3 V) < 4 V
–0.3 V to (VCC + 0.3 V) < 6.5 V
±10
mA
–40°C to 125°C
–55°C to 150°C
150°C
260°C, 5 s
260°C
Supply voltage differences: VCCF, VCCL, VCCC, VCCR
Ground voltage differences: AGNDF, AGNDL, AGNDC, AGNDR, DGND
LRCK, DATA, BCK, SCK, MS(2), MDI(2), MC, MUTE, RST, MSEL
Digital input voltage
ZEROL, ZEROR, MDO, MS(3), MDI(3)
Analog input voltage
Input current (any pins except supplies)
Ambient temperature under bias
Storage temperature
Junction temperature
Lead temperature (soldering)
Package temperature (IR reflow, peak)
(1) Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
(2) Input mode or I2C mode.
(3) Output mode except for I2C mode.
ELECTRICAL CHARACTERISTICS
all specifications at TA = 25°C, VCC = 5 V, VDD = 3.3 V, fS = 44.1 kHz, system clock = 256 fS, and 24-bit data, unless otherwise noted
PCM1791ADB
PARAMETER
RESOLUTION
DATA FORMAT (PCM Mode)
Audio data interface format
Audio data bit length
Audio data format
fS
Sampling frequency
System clock frequency
DATA FORMAT (DSD Mode)
Audio data interface format
Audio data bit length
fS
Sampling frequency
System clock frequency
2.8224
DSD (Direct stream digital)
1 Bit
2.8224
11.2896
MHz
MHz
Standard, I2S, left justified
16-, 20-, 24-bit selectable
MSB first, 2s complement
10
200
kHz
128, 192, 256, 384, 512, 768 fS
MIN
TYP
24
MAX
UNIT
Bits
2
PCM1791A
www.ti.com
SLES071A − MARCH 2003 − REVISED JANUARY 2004
ELECTRICAL CHARACTERISTICS (Continued)
all specifications at TA = 25°C, VCC = 5 V, VDD = 3.3 V, fS = 44.1 kHz, system clock = 256 fS, and 24-bit data, unless otherwise noted
PCM1791ADB
PARAMETER
DIGITAL INPUT/OUTPUT
Logic family
VIH
VIL
IIH
IIL
VOH
VOL
Input logic level
Input logic current
Output logic level
VIN = VDD
VIN = 0 V
IOH = –2 mA
IOL = 2 mA
VOUT = VDD
VOUT = 0 V
fS = 44.1 kHz
fS = 96 kHz
fS = 192 kHz
EIAJ, A-weighted, fS = 44.1 kHz
Dynamic range
EIAJ, A-weighted, fS = 96 kHz
EIAJ, A-weighted, fS = 192 kHz
EIAJ, A-weighted, fS = 44.1 kHz
Signal-to-noise ratio
EIAJ, A-weighted, fS = 96 kHz
EIAJ, A-weighted, fS = 192 kHz
Channel separation
Level linearity error
DYNAMIC PERFORMANCE (DSD MODE) (2) (3)
THD+N at VOUT = 0 dB
Dynamic range
Signal-to-noise ratio
ANALOG OUTPUT
Gain error
Gain mismatch, channel-to-channel
Bipolar zero error
Differential output voltage (4)
Bipolar zero voltage (4)
Load impedance (4)
At BPZ
Full scale (0 dB)
At BPZ
R1 = R2
1.7
–8
–3
–2
±3
±0.5
±0.5
3.2
1.4
8
3
2
% of FSR
% of FSR
% of FSR
V p-p
V
kΩ
2.1 V rms
–60 dB, EIAJ, A-weighted
EIAJ, A-weighted
0.001%
113
113
dB
dB
fS = 44.1 kHz
fS = 96 kHz
fS = 192 kHz
VOUT = –120 dB
106
110
110
0.001%
0.0015%
0.003%
113
113
113
113
113
113
110
110
109
±1
dB
dB
dB
dB
2.4
0.4
10
−10
0.002%
VDC
µA
A
TTL compatible
2
0.8
10
–10
VDC
µA
A
TEST CONDITIONS
MIN
TYP
MAX
UNIT
IOHZ
High-impedance output logic current (1)
IOLZ
DYNAMIC PERFORMANCE (PCM MODE) (2)
THD+N at VOUT = 0 dB
(1) MDO pin
(2) Dynamic performance and DC accuracy are specified at the output of the postamplifier as shown in Figure 36. Analog performance specifications
are measured using the System Twot Cascade audio measurement system by Audio Precisiont in the averaging mode. For all
sampling-frequency operations, measurement bandwidth is limited with a 20-kHz AES17 filter.
(3) Analog performance in the DSD mode is specified as the DSD modulation index of 100%. This is equivalent to PCM−mode performance at
44.1 kHz and 64 fS.
(4) These parameters are defined at the PCM1791A output pins. Load impedances, R1 and R2, are input resistors of the postamplifier. They are
defined as dc loads.
Audio Precision and System Two are trademarks of Audio Precision, Inc.
Other trademarks are the property of their respective owners.
3
PCM1791A
www.ti.com
SLES071A − MARCH 2003 − REVISED JANUARY 2004
ELECTRICAL CHARACTERISTICS (Continued)
all specifications at TA = 25°C, VCC = 5 V, VDD = 3.3 V, fS = 44.1 kHz, system clock = 256 fS, and 24-bit data, unless otherwise noted
PCM1791ADB
PARAMETER
DIGITAL FILTER PERFORMANCE
De-emphasis error
FILTER CHARACTERISTICS-1: SHARP ROLL OFF
Pass band
Stop band
Pass-band ripple
Stop-band attenuation
Delay time
FILTER CHARACTERISTICS-2: SLOW ROLL OFF
Pass band
Stop band
Pass-band ripple
Stop-band attenuation
Delay time
POWER SUPPLY REQUIREMENTS
VDD
VCC
IDD
3
Voltage range
fS = 44.1 kHz
fS = 96 kHz
fS = 192 kHz
fS = 44.1 kHz
ICC
Supply current (1)
fS = 96 kHz
fS = 192 kHz
fS = 44.1 kHz
fS = 96 kHz
fS = 192 kHz
TEMPERATURE RANGE
Operation temperature
θ
JA
Thermal resistance
(1) Input is BPZ data.
28-pin SSOP
–25
100
85
°C
°C/W
4.5
3.3
5
6.5
13.5
28
14
15
16
90
120
170
110
mW
16
mA
3.6
5.5
8
mA
VDC
VDC
Stop band = 0.732 fS
–82
29/fS
±0.04
dB
–3 dB
0.732 fS
±0.002
dB
dB
s
0.274 fS
0.454 fS
Stop band = 0.546 fS
Stop band = 0.567 fS
–75
−82
29/fS
dB
s
±0.002
dB
–3 dB
0.546 fS
±0.002
dB
0.454 fS
0.49 fS
±0.1
dB
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Supply current (1)
Power dissipation (1)
4
PCM1791A
www.ti.com
SLES071A − MARCH 2003 − REVISED JANUARY 2004
PIN ASSIGNMENTS
PCM1791A
(TOP VIEW)
LRCK
BCK
DATA
MUTE
SCK
RST
V
DD
DGND
AGNDF
V
CC
R
AGNDR
V
OUT
R−
V
OUT
R+
V
COM
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
MS
MC
MDI
MDO
MSEL
ZEROL
ZEROR
V
CC
F
V
CC
L
AGNDL
V
OUT
L−
V
OUT
L+
AGNDC
V
CC
C
5
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