SRC4194 Datasheet, PDF (1/40 Pages) Burr-Brown (TI) – 4-Channel, Asynchronous Sample Rate Converter

SRC4194
SBFS025A − JUNE 2004 − REVISED JULY 2004
4-Channel, Asynchronous Sample Rate Converter
FEATURES
D AUTOMATIC SENSING OF INPUT-TO-OUTPUT
SAMPLING RATIO
D WIDE INPUT-TO-OUTPUT SAMPLING RANGE:
16:1 to 1:16
D SUPPORTS INPUT AND OUTPUT SAMPLING
RATES UP TO 212kHz
D DYNAMIC RANGE: 144dB (−60dbFS Input,
BW = 20Hz to f_s/2)
D THD+N: −140dB (0dbFS Input, BW = 20Hz to f_s/2)
D HIGH-PERFORMANCE, LINEAR-PHASE DIGITAL
FILTERING WITH BETTER THAN 140dB OF
STOP BAND ATTENUATION
D FLEXIBLE AUDIO SERIAL PORTS:
− Master or Slave Mode Operation
− Supports I²S, Left-Justified, Right-Justified,
and TDM Data Formats
− TDM Mode Allows Daisy-Chaining of Up to
Four Devices
D SUPPORTS 24-, 20-, 18-, or 16-BIT INPUT AND
OUTPUT DATA:
− All Output Data is Dithered from the Internal
28-Bit Data Path
D SERIAL PERIPHERAL INTERFACE (SPI) PORT
SUPPORTS REGISTER READ AND WRITE
OPERATIONS IN SOFTWARE MODE
D BYPASS MODE:
− Routes Input Port Data Directly to the Output
Port
D FOUR GROUP DELAY OPTIONS FOR THE
INTERPOLATION FILTER
D DIRECT DOWNSAMPLING OPTION FOR THE
DECIMATION FILTER
D DIGITAL DE-EMPHASIS FILTER:
− User-Selectable for 32kHz, 44.1kHz, and
48kHz Sampling Rates
D SOFT MUTE FUNCTION
D PROGRAMMABLE DIGITAL OUTPUT
ATTENUATION (SOFTWARE MODE ONLY):
− 256 Steps: 0dB to −127.5dB with 0.5dB Steps
D INPUT-TO-OUTPUT SAMPLING RATIO
READBACK (SOFTWARE MODE ONLY)
D POWER-DOWN MODES
D SUPPORTS OPERATION FROM A SINGLE +1.8V
OR +3.3V POWER SUPPLY
D AVAILABLE IN A TQFP-64 PACKAGE
APPLICATIONS
D DIGITAL MIXING CONSOLES
D DIGITAL AUDIO WORKSTATIONS
D AUDIO DISTRIBUTION SYSTEMS
D BROADCAST STUDIO EQUIPMENT
D GENERAL DIGITAL AUDIO PROCESSING
DESCRIPTION
The SRC4194 is a four-channel, asynchronous sample
rate converter (ASRC), designed for professional and
broadcast audio applications. The SRC4194 combines a
wide input-to-output sampling ratio with outstanding
dynamic range and ultra low distortion. The input and
output serial ports support the most common audio data
formats, as well as a time division multiplexed (TDM)
format. This allows the SRC4194 to interface to a wide
range of audio data converters, digital audio receivers and
transmitters, and digital signal processors.
The SRC4194 may be operated in Hardware mode as a
standalone pin-programmed device, with dedicated
control pins for serial port mode, audio data format, soft
mute, bypass, and digital filtering functions. Alternatively,
the SRC4194 may be operated in Software mode, where
a four-wire serial peripheral interface (SPI) port provides
access to internal control and status registers.
The SRC4194 operates from either a +1.8V core supply or
a +3.3V core supply. When operating from +3.3V, the
+1.8V required by the core logic is derived from an internal
voltage regulator. The SRC4194 also requires a digital I/O
supply, which operates from +1.65V to +3.6V. The
SRC4194 is available in a TQFP-64 package.
Patents pending.
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.
All 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.
Copyright  2004, Texas Instruments Incorporated
www.ti.com