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Burr-Brown
Burr-Brown

PCM1794A Datasheet

audio stereo digital-to-analog converter


PCM1794A Datasheet Preview


BurrĆBrown Products
from Texas Instruments
PCM1794A
SLES117A – AUGUST 2004 – REVISED NOVEMBER 2006
24ĆBIT, 192ĆkHz SAMPLING, ADVANCED SEGMENT,
AUDIO STEREO DIGITALĆTOĆANALOG CONVERTER
www.DataSheet4U.com
FEATURES
D 24-Bit Resolution
D Analog Performance:
− Dynamic Range: 132 dB (9 V RMS, Mono)
129 dB (4.5 V RMS, Stereo)
127 dB (2 V RMS, Stereo)
− THD+N: 0.0004%
D Differential Current Output: 7.8 mA p-p
D 8× Oversampling Digital Filter:
− Stop-Band Attenuation: –130 dB
− Pass-Band Ripple: ±0.00001 dB
D Sampling Frequency: 10 kHz to 200 kHz
D System Clock: 128, 192, 256, 384, 512, or
768 fS With Autodetect
D Accepts 16- and 24-Bit Audio Data
D PCM Data Formats: Standard, I2S, and
Left-Justified
D Optional Interface Available to External
Digital Filter or DSP
D Digital De-Emphasis
D Digital Filter Rolloff: Sharp or Slow
D Soft Mute
D Zero Flag
D Dual-Supply Operation:
− 5-V Analog, 3.3-V Digital
D 5-V Tolerant Digital Inputs
D Small 28-Lead SSOP Package
APPLICATIONS
D A/V Receivers
D DVD Players
D Musical Instruments
D HDTV Receivers
D Car Audio Systems
D Digital Multitrack Recorders
D Other Applications Requiring 24-Bit Audio
DESCRIPTION
The PCM1794A 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 PCM1794A
provides balanced current outputs, allowing the user to
optimize analog performance externally. Sampling rates
up to 200 kHz are supported.
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
Page 1

PCM1794A
SLES117A – AUGUST 2004 – REVISED NOVEMBER 2006
www.ti.com
ORDERING INFORMATION
PRODUCT
PACKAGE
PACKAGE
CODE
PCM1794ADB 28-lead SSOP
28DB
OPERATION
TEMPERATURE
RANGE
–25°C to 85°C
PACKAGE
MARKING
PCM1794A
ORDERING
NUMBER
PCM1794ADB
PCM1794ADBR
TRANSPORT
MEDIA
Tube
Tape and reel
ABSOLUTE MAXIMUM RATINGS
over operating free-air temperature range unless otherwise noted(1)
PCM1794A
Supply voltage
VCC1, VCC2L, VCC2R
VDD
Supply voltage differences: VCC1, VCC2L, VCC2R
Ground voltage differences: AGND1, AGND2, AGND3L, AGND3R, DGND
–0.3 V to 6.5 V
–0.3 V to 4 V
±0.1 V
±0.1 V
Digital input voltage
LRCK, DATA, BCK, SCK, FMT1, FMT0, MONO, CHSL, DEM, MUTE, RST,
ZERO
Analog input voltage
Input current (any pins except supplies)
–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
Ambient temperature under bias
–40°C to 125°C
Storage temperature
–55°C to 150°C
Junction temperature
150°C
Lead temperature (soldering)
260°C, 5 s
Package temperature (IR reflow, peak)
250°C
(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.
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
PARAMETER
TEST CONDITIONS
PCM1794ADB
MIN TYP MAX
UNIT
RESOLUTION
24 Bits
DATA FORMAT
Audio data interface format
Standard, I2S, left justified
Audio data bit length
16-, 24-bit selectable
Audio data format
MSB first, 2s complement
fS Sampling frequency
System clock frequency
DIGITAL INPUT/OUTPUT
10 200
128, 192, 256, 384, 512, 768 fS
kHz
Logic family
TTL compatible
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
2
VDC
0.8
10
µA
–10
2.4
VDC
0.4
2
Page 2

www.ti.com
PCM1794A
SLES117A – AUGUST 2004 – 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
PARAMETER
DYNAMIC PERFORMANCE (2-V RMS OUTPUT) (1)(2)
TEST CONDITIONS
PCM1794ADB
MIN TYP MAX
UNIT
fS = 44.1 kHz
THD+N at VOUT = 0 dB
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
fS = 44.1 kHz
Channel separation
fS = 96 kHz
fS = 192 kHz
Level linearity error
VOUT = –120 dB
DYNAMIC PERFORMANCE (4.5-V RMS Output) (1)(3)
0.0004% 0.0008%
0.0008%
0.0015%
123 127
127
127
123 127
127
127
120 123
122
120
±1
dB
dB
dB
dB
THD+N at VOUT = 0 dB
Dynamic range
Signal-to-noise ratio
Channel separation
DYNAMIC PERFORMANCE (MONO MODE) (1)(3)
fS = 44.1 kHz
fS = 96 kHz
fS = 192 kHz
EIAJ, A-weighted, fS = 44.1 kHz
EIAJ, A-weighted, fS = 96 kHz
EIAJ, A-weighted, fS = 192 kHz
EIAJ, A-weighted, fS = 44.1 kHz
EIAJ, A-weighted, fS = 96 kHz
EIAJ, A-weighted, fS = 192 kHz
fS = 44.1 kHz
fS = 96 kHz
fS = 192 kHz
0.0004%
0.0008%
0.0015%
129
129
129
129
129
129
124
123
121
dB
dB
dB
fS = 44.1 kHz
0.0004%
THD+N at VOUT = 0 dB
fS = 96 kHz
0.0008%
fS = 192 kHz
0.0015%
EIAJ, A-weighted, fS = 44.1 kHz
132
Dynamic range
EIAJ, A-weighted, fS = 96 kHz
132 dB
EIAJ, A-weighted, fS = 192 kHz
132
EIAJ, A-weighted, fS = 44.1 kHz
132
Signal-to-noise ratio
EIAJ, A-weighted, fS = 96 kHz
132 dB
(1) Filter condition:
EIAJ, A-weighted, fS = 192 kHz
132
THD+N: 20-Hz HPF, 20-kHz apogee 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 Precisionin the
averaging mode.
(2) Dynamic performance and dc accuracy are specified at the output of the postamplifier as shown in Figure 24.
(3) Dynamic performance and dc accuracy are specified at the output of the postamplifier as shown in Figure 25.
Audio Precision and System Two are trademarks of Audio Precision, Inc.
Other trademarks are the property of their respective owners.
3
Page 3

PCM1794A
SLES117A – AUGUST 2004 – REVISED NOVEMBER 2006
www.ti.com
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
PARAMETER
TEST CONDITIONS
PCM1794ADB
MIN TYP MAX
UNIT
ANALOG OUTPUT
Gain error
–6 ±2
6 % of FSR
Gain mismatch, channel-to-channel
–3 ±0.5
3 % of FSR
Bipolar zero error
At BPZ
–2 ±0.5
2 % of FSR
Output current
Full scale (0 dB)
7.8 mA p-p
Center current
At BPZ
–6.2 mA
DIGITAL FILTER PERFORMANCE
De-emphasis error
±0.004
dB
FILTER CHARACTERISTICS-1: SHARP ROLLOFF
Pass band
Stop band
Pass-band ripple
±0.00001 dB
–3 dB
0.546 fS
0.454 fS
0.49 fS
±0.00001
dB
Stop-band attenuation
Delay time
Stop band = 0.546 fS
FILTER CHARACTERISTICS-2: SLOW ROLLOFF
–130
55/fS
dB
s
Pass band
Stop band
Pass-band ripple
±0.04 dB
–3 dB
0.732 fS
0.254 fS
0.46 fS
±0.001
dB
Stop-band attenuation
Delay time
POWER SUPPLY REQUIREMENTS
Stop band = 0.732 fS
–100
18/fS
dB
s
VDD
VCC1
VCC2L
VCC2R
Voltage range
IDD
Supply current (1)
ICC
Power dissipation (1)
TEMPERATURE RANGE
fS = 44.1 kHz
fS = 96 kHz
fS = 192 kHz
fS = 44.1 kHz
fS = 96 kHz
fS = 192 kHz
fS = 44.1 kHz
fS = 96 kHz
fS = 192 kHz
3 3.3 3.6 VDC
4.75 5 5.25 VDC
12 15
23 mA
45
33 40
35 mA
37
205 250
250 mW
335
Operation temperature
–25 85 °C
θJA Thermal resistance
(1) Input is BPZ data.
28-pin SSOP
100 °C/W
4
Page 4
Part Number PCM1794A
Manufactur Burr-Brown
Description audio stereo digital-to-analog converter
Total Page 30 Pages
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