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기능 24BIT 192 KHZ SAMPLING ADVANCED SEGMENT AUDIO STEREO DIGITAL TO ANALOG CONVERTER
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PCM1796DB 데이터시트, 핀배열, 회로
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




PCM1796DB pdf, 반도체, 판매, 대치품
PCM1796
SLES100 − DECEMBER 2003
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
PCM1796DB
MIN TYP MAX
UNIT
DSD MODE DYNAMIC PERFORMANCE (1) (2) (44.1 KHZ, 64 fS)
THD+N at FS
2 V rms
0.0007%
Dynamic range
–60 dB, EIAJ, A-weighted
122 dB
Signal-to-noise ratio
EIAJ, A-weighted
122 dB
ANALOG OUTPUT
Gain error
–7 ±2
7 % 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)
4 mA p-p
Center current
At BPZ
–3.5 mA
DIGITAL FILTER PERFORMANCE
De-emphasis error
±0.1 dB
FILTER CHARACTERISTICS–1: SHARP ROLLOFF
Pass band
Stop band
Pass-band ripple
±0.0002 dB
–3 dB
0.546 fS
0.454 fS
0.49 fS
±0.0002 dB
Stop-band attenuation
Stop band = 0.546 fS
–98
dB
Delay time
FILTER CHARACTERISTICS–2: SLOW ROLLOFF
38/fS
s
Pass band
±0.001 dB
–3 dB
0.21 fS
0.448 fS
Stop band
Pass-band ripple
0.79 fS
±0.001 dB
Stop-band attenuation
Stop band = 0.732 fS
–80
dB
Delay time
(1) Filter condition:
THD+N: 20-Hz HPF, 20-kHz AES17 LPF
38/fS
s
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.
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PCM1796DB 전자부품, 판매, 대치품
www.ti.com
FUNCTIONAL BLOCK DIAGRAM
LRCK
BCK
DATA
RST
MDO
MDI
MC
MS
MSEL
Audio
Data Input
I/F
Function
Control
I/F
8
Oversampling
Digital
Filter
and
Function
Control
ZEROL
ZEROR
Zero
Detect
System
Clock
Manager
Advanced
Segment
DAC
Modulator
IOUTL−
Current
Segment
DAC
IOUTL+
Bias
and
Vref
VCOML
IREF
VCOMR
IOUTR−
Current
Segment
DAC
IOUTR+
Power Supply
PCM1796
SLES100 − DECEMBER 2003
VOUTL
I/V and Filter
VOUTR
I/V and Filter
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