Burr Brown Products
from Texas Instruments
PCM1796
SLES100A − DECEMBER 2003 − REVISED NOVEMBER 2006
24 BIT, 192 kHz SAMPLING, ADVANCED SEGMENT,
AUDIO STEREO DIGITAL TO ANALOG CONVERTER
FEATURES
D
24-Bit Resolution
D
Analog Performance:
D
D
D
D
D
D
− Dynamic Range: 123 dB
− THD+N: 0.0005%
Differential Current Output: 4 mA p-p
8× Oversampling Digital Filter:
− Stop-Band Attenuation: –98 dB
− Pass-Band Ripple:
±0.0002
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
Digital Filter or DSP
D
5-V Tolerant Digital Inputs
D
Small 28-Lead SSOP Package
APPLICATIONS
D
D
D
D
D
D
D
A/V Receivers
SACD Players
DVD Players
HDTV Receivers
Car Audio Systems
Digital Multitrack Recorders
Other Applications Requiring 24-Bit Audio
DESCRIPTION
The PCM1796 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 PCM1796 provides balanced
current outputs, allowing the user to optimize analog
performance externally. The PCM1796 accepts PCM and
DSD audio data formats, providing easy interfacing to
audio DSP and decoder chips. The PCM1796 also
interfaces with 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
PCM1796 also supports the time division multiplexed
command and audio (TDMCA) data format.
D
D
Interface Available for Optional External
D
TDMCA or Serial Port (SPI/I
2
C)
D
User-Programmable Mode Controls:
D
D
− 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
Compatible With PCM1792 (Pins and Mode
Controls)
Dual Supply Operation:
− 5-V Analog, 3.3-V Digital
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
2006, Texas Instruments Incorporated
PCM1796
www.ti.com
SLES100A − DECEMBER 2003 − REVISED NOVEMBER 2006
ORDERING INFORMATION
PRODUCT
PACKAGE
PACKAGE CODE
OPERATION
TEMPERATURE
RANGE
–25°C to 85°C
PACKAGE
MARKING
PCM1796
ORDERING
NUMBER
PCM1796DB
PCM1796DB
28-lead SSOP
28DB
PCM1796DBR
TRANSPORT
MEDIA
Tube
Tape and reel
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range unless otherwise noted(1)
PCM1796
Supply voltage
VCC1, VCC2L, VCC2R
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: VCC1, VCC2L, VCC2R
Ground voltage differences: AGND1, AGND2, AGND3L, AGND3R, DGND
LRCK, DATA, BCK, SCK, MSEL, RST, MS(2), MDI, MC, MDO(2), ZEROL(2), ZEROR(2)
Digital input
voltage
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)
ZEROL(3), ZEROR(3), MDO(3), MS(3)
(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, VCC1 = VCC2L = VCC2R = 5 V, VDD = 3.3 V, fS = 44.1 kHz, system clock = 256 fS, and 24-bit data unless
otherwise noted
PCM1796DB
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, twos complement
10
200
kHz
128, 192, 256, 384, 512, 768 fS
TEST CONDITIONS
MIN
TYP
24
MAX
UNIT
Bits
2
PCM1796
www.ti.com
SLES100A − DECEMBER 2003 − REVISED NOVEMBER 2006
ELECTRICAL CHARACTERISTICS (Continued)
all specifications at TA = 25°C, VCC1 = VCC2L = VCC2R = 5 V, VDD = 3.3 V, fS = 44.1 kHz, system clock = 256 fS, and 24-bit data unless
otherwise noted
PCM1796DB
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
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 (MONO MODE) (1)(2)(3)
THD+N at VOUT = 0 dB
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
0.0005%
0.001%
0.0015%
126
126
126
126
126
126
dB
dB
fS = 44.1 kHz
fS = 96 kHz
fS = 192 kHz
VOUT = –120 dB
116
120
120
2.4
0.4
0.0005%
0.001%
0.0015%
123
123
123
123
123
123
119
118
117
±1
dB
dB
dB
dB
0.001%
TTL compatible
2
0.8
10
–10
VDC
µA
VDC
TEST CONDITIONS
MIN
TYP
MAX
UNIT
DYNAMIC PERFORMANCE (PCM MODE) (1)(2)
THD+N at VOUT = 0 dB
(1) Filter condition:
THD+N: 20-Hz HPF, 20-kHz AES17 LPF
Dynamic range: 20-Hz HPF, 20-kHz AES17 LPF, A-weighted
Signal-to-noise ratio: 20-Hz HPF, 20-kHz AES17 LPF, A-weighted
Channel separation: 20-Hz HPF, 20-kHz AES17 LPF
Analog performance specifications are measured using the System Twot Cascade audio measurement system by Audio Precision in the
averaging mode.
(2) Dynamic performance and dc accuracy are specified at the output of the postamplifier as shown in Figure 36.
(3) Dynamic performance and dc accuracy are specified at the output of the measurement circuit as shown in Figure 38.
Audio Precision and System Two are trademarks of Audio Precision, Inc.
Other trademarks are the property of their respective owners.
3
PCM1796
www.ti.com
SLES100A − DECEMBER 2003 − REVISED NOVEMBER 2006
ELECTRICAL CHARACTERISTICS (Continued)
all specifications at TA = 25°C, VCC1 = VCC2L = VCC2R = 5 V, VDD = 3.3 V, fS = 44.1 kHz, system clock = 256 fS, and 24-bit data unless
otherwise noted
PCM1796DB
PARAMETER
TEST CONDITIONS
MIN
TYP
0.0007%
122
122
–7
–3
At BPZ
Full scale (0 dB)
At BPZ
–2
±2
±0.5
±0.5
4
–3.5
±0.1
±0.0002
dB
–3 dB
0.546 fS
±0.0002
Stop band = 0.546 fS
–98
38/fS
±0.001
dB
–3 dB
0.79 fS
±0.001
Stop band = 0.732 fS
–80
38/fS
dB
dB
s
0.21 fS
0.448 fS
dB
dB
s
0.454 fS
0.49 fS
7
3
2
dB
dB
% of FSR
% of FSR
% of FSR
mA p-p
mA
dB
MAX
UNIT
DSD MODE DYNAMIC PERFORMANCE (1) (2) (44.1 kHZ, 64 fS)
THD+N at FS
Dynamic range
Signal-to-noise ratio
ANALOG OUTPUT
Gain error
Gain mismatch, channel-to-channel
Bipolar zero error
Output current
Center current
DIGITAL FILTER PERFORMANCE
De-emphasis error
FILTER CHARACTERISTICS–1: SHARP ROLLOFF
Pass band
Stop band
Pass-band ripple
Stop-band attenuation
Delay time
FILTER CHARACTERISTICS–2: SLOW ROLLOFF
Pass band
Stop band
Pass-band ripple
Stop-band attenuation
Delay time
2 V rms
–60 dB, EIAJ, A-weighted
EIAJ, A-weighted
(1) Filter condition:
THD+N: 20-Hz HPF, 20-kHz AES17 LPF
Dynamic range: 20-Hz HPF, 20-kHz AES17 LPF, A-weighted
Signal-to-noise ratio: 20-Hz HPF, 20-kHz AES17 LPF, A-weighted
Channel separation: 20-Hz HPF, 20-kHz AES17 LPF
Analog performance specifications are measured using the System Two Cascade audio measurement system by Audio Precision in the averaging
mode.
(2) Dynamic performance and dc accuracy are specified at the output of the postamplifier as shown in Figure 37.
4
PCM1796
www.ti.com
SLES100A − DECEMBER 2003 − REVISED NOVEMBER 2006
ELECTRICAL CHARACTERISTICS (Continued)
all specifications at TA = 25°C, VCC1 = VCC2L = VCC2R = 5 V, VDD = 3.3 V, fS = 44.1 kHz, system clock = 256 fS, and 24-bit data unless
otherwise noted
PCM1796DB
PARAMETER
POWER SUPPLY REQUIREMENTS
VDD
VCC1
VCC2L
VCC2R
IDD
Supply current (1)
ICC
3
Voltage range
4.75
fS = 44.1 kHz
fS = 96 kHz
fS = 192 kHz
fS = 44.1 kHz
fS = 96 kHz
fS = 192 kHz
Power dissipation (1)
TEMPERATURE RANGE
Operation temperature
θ
JA
Thermal resistance
(1) Input is BPZ data.
28-pin SSOP
–25
100
85
°C
°C/W
fS = 44.1 kHz
fS = 96 kHz
fS = 192 kHz
3.3
5
7
13
25
18
19
20
115
140
180
150
mW
23
mA
3.6
5.25
9
mA
VDC
VDC
TEST CONDITIONS
MIN
TYP
MAX
UNIT
PIN ASSIGNMENTS
PCM1796
(TOP VIEW)
ZEROL
ZEROR
MSEL
LRCK
DATA
BCK
SCK
DGND
V
DD
MS
MDI
MC
MDO
RST
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
V
CC
2L
AGND3L
I
OUT
L–
I
OUT
L+
AGND2
V
CC
1
V
COM
L
V
COM
R
I
REF
AGND1
I
OUT
R–
I
OUT
R+
AGND3R
V
CC
2R
5
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