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PCM1796DBR Schematic ( PDF Datasheet ) - Burr-Brown Corporation

Teilenummer PCM1796DBR
Beschreibung 24BIT 192 KHZ SAMPLING ADVANCED SEGMENT AUDIO STEREO DIGITAL TO ANALOG CONVERTER
Hersteller Burr-Brown Corporation
Logo Burr-Brown Corporation Logo 




Gesamt 30 Seiten
PCM1796DBR Datasheet, Funktion
BurrĆBrown Products
from Texas Instruments
PCM1796
SLES100 − DECEMBER 2003
24ĆBIT, 192ĆkHz SAMPLING, ADVANCED SEGMENT,
AUDIO STEREO DIGITALĆTOĆANALOG CONVERTER
FEATURES
D 24-Bit Resolution
D Analog Performance:
− Dynamic Range: 123 dB
− THD+N: 0.0005%
D Differential Current Output: 4 mA p-p
D 8× Oversampling Digital Filter:
− Stop-Band Attenuation: –98 dB
− Pass-Band Ripple: ±0.0002 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-, 20-, and 24-Bit Audio Data
D PCM Data Formats: Standard, I2S, and
Left-Justified
D DSD Format Interface Available
D Interface Available for Optional External
Digital Filter or DSP
D TDMCA or Serial Port (SPI/I2C)
D 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
D Compatible With PCM1792 (Pins and Mode
Controls)
D 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
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 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 I2C serial control port, which
supports register write and readback functions. The
PCM1796 also supports the time division multiplexed
command and audio (TDMCA) data format.
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 2003, Texas Instruments Incorporated






PCM1796DBR Datasheet, Funktion
PCM1796
SLES100 − DECEMBER 2003
www.ti.com
Terminal Functions
TERMINAL
NAME
PIN
I/O
DESCRIPTIONS
AGND1 19 − Analog ground (internal bias)
AGND2 24 − Analog ground (internal bias)
AGND3L
27
− Analog ground (L-channel DACFF)
AGND3R
BCK
DATA
16
6
5
− Analog ground (R-channel DACFF)
I Bit clock input(1)
I Serial audio data input(1)
DGND
8 − Digital ground
IOUTL+
IOUTL–
IOUTR+
IOUTR–
IREF
LRCK
MC
MDI
MDO
MS
MSEL
RST
SCK
25 O L-channel analog current output+
26 O L-channel analog current output–
17 O R-channel analog current output+
18 O R-channel analog current output–
20 − Output current reference bias pin
4 I Left and right clock (fS) input(1)
12 I Mode control clock input(1)
11 I Mode control data input(1)
13 I/O Mode control readback data output(3)
10 I/O Mode control chip-select input(2)
3 I I2C/SPI select(1)
14 I Reset(1)
7 I System clock input(1)
VCC1
23 − Analog power supply, 5 V
VCC2L
28 − Analog power supply (L-channel DACFF), 5 V
VCC2R 15 − Analog power supply (R-channel DACFF), 5 V
VCOML 22 − L-channel internal bias decoupling pin
VCOMR
21
− R-channel internal bias decoupling pin
VDD
ZEROL
9 − Digital power supply, 3.3 V
1 I/O Zero flag for L-channel(2)
ZEROR
2 I/O Zero flag for R-channel(2)
(1) Schmitt-trigger input, 5-V tolerant
(2) Schmitt-trigger input and output. 5-V tolerant input and CMOS output
(3) Schmitt-trigger input and output. 5-V tolerant input. In I2C mode, this pin becomes an open-drain 3-state output; otherwise, this pin is a CMOS
output.
6

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PCM1796DBR pdf, datenblatt
PCM1796
SLES100 − DECEMBER 2003
Temperature Characteristics
TOTAL HARMONIC DISTORTION + NOISE
vs
FREE-AIR TEMPERATURE
0.01
0.001
fS = 96 kHz
fS = 192 kHz
fS = 48 kHz
0.0001
−50
−25 0
25 50 75
TA − Free-Air Temperature − °C
Figure 15
SIGNAL-to-NOISE RATIO
vs
FREE-AIR TEMPERATURE
126
100
124
fS = 96 kHz
122
fS = 192 kHz
fS = 48 kHz
120
118
116
−50
−25 0
25 50 75
TA − Free-Air Temperature − °C
Figure 17
100
www.ti.com
DYNAMIC RANGE
vs
FREE-AIR TEMPERATURE
126
124
fS = 96 kHz
122 fS = 48 kHz
fS = 192 kHz
120
118
116
−50
−25 0
25 50 75
TA − Free-Air Temperature − °C
Figure 16
CHANNEL SEPARATION
vs
FREE-AIR TEMPERATURE
122
100
120 fS = 96 kHz
fS = 192 kHz
118
fS = 48 kHz
116
114
112
−50
−25 0
25 50 75
TA − Free-Air Temperature − °C
Figure 18
100
NOTE: PCM mode, VDD = 3.3 V, VCC = 5 V, measurement circuit is Figure 36.
12

12 Page





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