®
PCM
172
5
PCM1725
Stereo Audio
DIGITAL-TO-ANALOG CONVERTER
16 Bits, 96kHz Sampling
TM
FEATURES
q
COMPLETE STEREO DAC: Includes Digital
Filter and Output Amp
q
DYNAMIC RANGE: 95dB
q
MULTIPLE SAMPLING FREQUENCIES:
16kHz to 96kHz
q
8X OVERSAMPLING DIGITAL FILTER
q
SYSTEM CLOCK: 256f
S
/ 384f
S
q
NORMAL OR I
2
S DATA INPUT FORMATS
q
SMALL 14-PIN SOIC PACKAGE
DESCRIPTION
The PCM1725 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 PCM1725 accepts
16-bit input data in either normal or I
2
S formats.
The digital filter performs an 8X interpolation function
and includes de-emphasis at 44.1kHz. The PCM1725
can accept digital audio sampling frequencies from
16kHz to 96kHz, always at 8X oversampling.
The PCM1725 is ideal for low-cost, CD-quality con-
sumer audio applications.
BCKIN
LRCIN
DIN
Serial
Input
I/F
8X Oversampling
Digital Filter
Multi-level
Delta-Sigma
Modulator
DAC
Low-pass
Filter
V
OUT
L
CAP
Multi-level
Delta-Sigma
Modulator
Low-pass
Filter
V
OUT
R
DAC
FORMAT
Mode
Control
I/F
Power Supply
DM
256f
S
/384f
S
SCKI
V
CC
GND
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111
Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
®
© 1997 Burr-Brown Corporation
PDS-1373C
1
Printed in U.S.A.
PCM1725
January, 1998
BURR-BROWN [ BURR-BROWN CORPORATION ]
