Stereo, 24-Bit, 96kHz

8X Oversampling Digital Interpolation Filter

49%

FPO

DF1704

TM

DESCRIPTION

The DF1704 is a high-performance, stereo, 8X oversampling

digital interpolation filter designed for high-end consumer

and professional audio applications. The DF1704 supports

24-bit, 96kHz operation and features user-programmable

functions, including selectable filter response, de-emphasis,

attenuation, and input/output data formats.

The DF1704 is the ideal companion for Texas Instruments’

PCM1704 24-bit audio digital-to-analog converter. This

combination allows for construction of very high-perfor-

mance audio systems and components.

FEATURES

q COMPANION DIGITAL FILTER FOR THE PCM1704

24-BIT AUDIO DAC

q HIGH PERFORMANCE FILTER:

Stopband Attenuation: –115dB

Passband Ripple:

q AUDIO INTERFACE:

Input Data Formats: Standard, Left-

Input Word Length: 16, 20, or 24 Bits

Output Word Length: 16, 18, 20, or 24 Bits

Sampling Frequency: 32kHz to 96kHz

q PROGRAMMABLE FUNCTIONS:

Hardware or Software Control Modes

Sharp or Slow Roll-Off Filter Response

Soft Mute

Digital De-Emphasis

Independent Left/Right Digital Attenuation

DF17

04

Serial

Input

I/F

Mode

Control

I/F

8X Oversampling

Digital Filter with

Function

Controller

Crystal/OSC

XTI

SCK

XTO

CLKO

(SF0) (SF1) (SRO)

V

DD

V

SS

Output I/F

BCKO

WCKO

DOL

DOR

MC/LRIP

MD/CKO

LRCIN

DIN

BCKIN

MODE

ML/RESV

(MUTE)

RST

(DEM)

Power Supply

SBAS099A – MARCH 2001

www.ti.com

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 © 1998, Texas Instruments Incorporated

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.

q SYSTEM CLOCK: 256f

q ON-CHIP CRYSTAL OSCILLATOR

q +5V SINGLE-SUPPLY OPERATION

q SMALL SSOP-28 PACKAGE