DF1750 Datasheet, PDF (1/13 Pages) Burr-Brown (TI) – Dual Channel DIGITAL DECIMATION FILTER

®
DF1750
Dual Channel
DIGITAL DECIMATION FILTER
FEATURES
q USER SELECTABLE FOR 1/4 OR 1/2
DECIMATING RATIOS
q USER SELECTABLE FOR 16- OR 18-BIT
INPUT DATA
q SERIAL DATA INPUT IS COMPATIBLE
WITH THE BURR-BROWN PCM1750 ADC
q FILTERS OUT-OF-BAND NOISE WITH
STOPBAND ATTENUATION > 95dB
q PASSBAND RIPPLE < 0.0005dB
q SINGLE +5V SUPPLY OPERATION WITH
LOW POWER DISSIPATION OF ONLY
250mW
DESCRIPTION
The DF1750 is a high performance 1/4 or 1/2 decimat-
ing digital filter that is designed for digital audio appli-
cations. This device decimates and filters 2x or 4x (2fs
or 4fs) oversampled data from the output of an ADC to
a data frequency of fs. The technique of oversampling
and decimating allows the input to an oversampling
ADC to be processed by a much lower order, linear
phase, analog low-pass filter. This simultaneously im-
proves system performance while reducing circuit com-
plexity and cost.
The DF1750 provides output data word rates (fs) up to
50.5kHz and it is compatible with the Burr-Brown
PCM1750, dual 18-bit analog-to-digital converter.
XTI
XTO
CKEN
CKO
CC
BBC
IBO
TEST
SCSL1
SCSL2
2DS
IBCK
DINL
DINR
System Clock
Timing Control
Input Interface Circuit
FIR Filter Circuit
Output Interface Circuit
IMOD
OW20
FSEN
LRCK WDCK
BCK
DOUT MUTE LRPOL OBPOL
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 • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]
© 1990 Burr-Brown Corporation
PDS-1092
Printed in U.S.A. October, 1993