PCM1740_09 Datasheet, PDF (1/25 Pages) Texas Instruments – DIGITAL-TO-ANALOG CONVERTER

PCM1740
PCM1740
SBAS128B – JANUARY 2000 – REVISED MAY 2007
TM _{Stereo Audio}
DIGITAL-TO-ANALOG CONVERTER
with VCXO and PLL
FEATURES
APPLICATIONS
q COMPLETE DELTA-SIGMA STEREO DAC
q SET-TOP BOXES
q VOLTAGE-CONTROLLED CRYSTAL OSCILLATOR:
27MHz ±150ppm Output with 0V to 3V Input
q DIGITAL BROADCAST RECEIVERS
q PROGRAMMABLE PLL
256f_S or 384f_S Audio System Clock Output
q DYNAMIC PERFORMANCE:
Dynamic Range: 94dB
SNR: 94dB
THD+N: –89dB
q SAMPLING FREQUENCIES:
16kHz, 22.05kHz, 24kHz
32kHz, 44.1kHz, 48kHz
64kHz, 88.2kHz, 96kHz
q SERIAL AUDIO INTERFACE:
Standard or I²S™ Data Formats
16-, 20-, or 24-Bit Data
DESCRIPTION
The PCM1740 is a complete stereo audio digital-to-
analog converter with on-chip PLL and VCXO. The
PCM1740 is designed specifically for set-top box applica-
tions requiring high-quality audio playback, a precision
tuned 27MHz master clock source, and support for mul-
tiple audio-sampling frequencies.
The stereo digital-to-analog converter (DAC) uses multi-
bit, delta-sigma architecture, which includes an 8x inter-
polation filter, 3rd-order noise shaping, 5-level amplitude
quantization, and an analog low-pass filter. The PCM1740
includes a number of user-programmable functions, which
are accessed via a standard I²C-Bus interface.
q I²C-BUS™ INTERFACE FOR CONTROL
REGISTERS:
Slave Receiver Operation
7-Bit Addressing
Standard Transfer Rate (up to 100kbps)
q PROGRAMMABLE CONTROLS:
Digital Attenuation (256 steps)
Soft Mute
Infinite Zero Detect Mute
De-Emphasis (32kHz, 44.1kHz, 48kHz)
DAC Output Mode
q SINGLE +5V SUPPLY
q SMALL SSOP-24 PACKAGE
BCK
LRCK
DATA
PCM
Audio
I/F
SCL
SDA
AD1
AD0
XTUN
27MHz
Crystal
XT1
XT2
RST
I²C
I/F
and
REGs
VCXO
8x
Oversampling
Digital Filter
and
Sub-Functions
Process
DAC
(L)
DAC
(R)
Low-Pass
Filter
and Amp
Counter N
Phase
Detector
LPF
Counter M
VCO
Reset
Power Supply
V_OUTL
V_COM
V_OUTR
ZERO
SCKO
(256f_S/ 384f_S)
MCKO
(27MHz)
V_PP PGND V_CC AGND V_DD DGND
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.
SoundPLUS is a trademark of Texas Instruments.
I²C-Bus, I²C, and I²S are trademarks of NXP B.V.
All other trademarks are the property of their respective owners.
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.
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Copyright © 2000-2007, Texas Instruments Incorporated