SBAS052 Datasheet, PDF (1/17 Pages) Texas Instruments – Stereo Audio DIGITAL-TO-ANALOG CONVERTER MPEG2/AC-3 COMPATIBLE

Not Recommended For New Designs
®
49%
PCM_{F1P7O20 ®}
PCM1720
TM _{Stereo Audio}
DIGITAL-TO-ANALOG CONVERTER
MPEG2/AC-3 COMPATIBLE
FEATURES
q ACCEPTS 16-, 20-, OR 24-BIT INPUT DATA
q COMPLETE STEREO DAC: Includes Digital
Filter and Output Amp
q DYNAMIC RANGE: 96dB
q MULTIPLE SAMPLING FREQUENCIES:
16kHz to 96kHz
8X Oversampling at All Sampling
Frequencies
q SYSTEM CLOCK: 256f_S/384f_S
q NORMAL OR I²S DATA INPUT FORMATS
q SELECTABLE FUNCTIONS:
Soft Mute
Digital Attenuator (256 Steps)
Digital De-emphasis
q OUTPUT MODE: Left, Right, Mono, Mute
DESCRIPTION
The PCM1720 is a complete low cost stereo audio
digital-to-analog converter (DAC), operating off of a
256f_S or 384f_S system clock. The DAC contains a 3rd-
order ∆Σ modulator, a digital interpolation filter, and
an analog output amplifier. The PCM1720 can accept
16-, 20-, or 24-bit input data in either normal or I²S
formats.
The digital filter performs an 8X interpolation func-
tion and includes selectable features such as soft mute,
digital attenuation and digital de-emphasis. The
PCM1720 can accept standard digital audio sampling
frequencies as well as one-half and double sampling
frequencies.
The PCM1720 is ideal for applications which combine
compressed audio and video data such as DVD, DVD-
ROM, set-top boxes and MPEG sound cards.
SBAS052
BCKIN
LRCIN
DIN
ML
MC
MD
RSTB
Serial
Input
I/F
Mode
Control
I/F
8X Oversampling
Digital Filter
with Function
Controller
Multi-level
Delta-Sigma
Modulator
DAC
Multi-level
Delta-Sigma
Modulator
DAC
Low-pass
Filter
Low-pass
Filter
BPZ-Cont.
256f_S/384f_S
Open Drain
Power Supply
V_OUTL
CAP
V_OUTR
ZERO
SCKI
V_CC AGND V_DD DGND
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: [phone] • Twx: 910-952-1111
Internet: http://www.burr-brown.com/ • FAXLine: [phone] (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]
© 1996 Burr-Brown Corporation
PDS-1333B
Printed in U.S.A. August, 1996