Product details

Number of SRC channels 4 Digital audio interface I2S, R, L, TDM Dynamic range (dB) 144 Digital supply (up to 5 V) (V) 1.65 - 2, 3 - 3.6 THD+N (dB) -140 Control mode SW (SPI) Power supply (V) 1.8, 3.3 Control interface SPI Audio data format Normal, I2S, TDM Rating Catalog Operating temperature range (C) -40 to 85
Number of SRC channels 4 Digital audio interface I2S, R, L, TDM Dynamic range (dB) 144 Digital supply (up to 5 V) (V) 1.65 - 2, 3 - 3.6 THD+N (dB) -140 Control mode SW (SPI) Power supply (V) 1.8, 3.3 Control interface SPI Audio data format Normal, I2S, TDM Rating Catalog Operating temperature range (C) -40 to 85
TQFP (PAG) 64 144 mm² 12 x 12
  • AUTOMATIC SENSING OF INPUT-TO-OUTPUT SAMPLING RATIO
  • WIDE INPUT-TO-OUTPUT SAMPLING RANGE: 16:1 to 1:16
  • SUPPORTS INPUT AND OUTPUT SAMPLING RATES UP TO 212kHz
  • DYNAMIC RANGE: 144dB (–60dbFS Input, BW = 20Hz to fs/2)
  • THD+N: –140dB (0dbFS Input, BW = 20Hz to fs/2)
  • HIGH-PERFORMANCE, LINEAR-PHASE DIGITAL FILTERING WITH BETTER THAN 140dB OF STOP BAND ATTENUATION
  • 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
  • SUPPORTS 24-, 20-, 18-, or 16-BIT INPUT AND OUTPUT DATA
    • All Output Data is Dithered from the Internal 28-Bit Data Path
  • SERIAL PERIPHERAL INTERFACE (SPI)™ PORT SUPPORTS REGISTER READ AND WRITE OPERATIONS IN SOFTWARE MODE
  • BYPASS MODE
    • Routes Input Port Data Directly to the Output Port
  • FOUR GROUP DELAY OPTIONS FOR THE INTERPOLATION FILTER
  • DIRECT DOWNSAMPLING OPTION FOR THE DECIMATION FILTER
  • DIGITAL DE-EMPHASIS FILTER
    • User-Selectable for 32kHz, 44.1kHz, and 48kHz Sampling Rates
  • SOFT MUTE FUNCTION
  • PROGRAMMABLE DIGITAL OUTPUT ATTENUATION (SOFTWARE MODE ONLY)
    • 256 Steps: 0dB to –127.5dB with 0.5dB Steps
  • INPUT-TO-OUTPUT SAMPLING RATIO READBACK (SOFTWARE MODE ONLY)
  • POWER-DOWN MODES
  • SUPPORTS OPERATION FROM A SINGLE +1.8V or +3.3V POWER SUPPLY
  • AVAILABLE IN A TQFP-64 PACKAGE
  • APPLICATIONS
    • DIGITAL MIXING CONSOLES
    • DIGITAL AUDIO WORKSTATIONS
    • AUDIO DISTRIBUTION SYSTEMS
    • BROADCAST STUDIO EQUIPMENT
    • GENERAL DIGITAL AUDIO PROCESSING

U.S. Patent No. 7,262,716.
All trademarks are the property of their respective owners.

  • AUTOMATIC SENSING OF INPUT-TO-OUTPUT SAMPLING RATIO
  • WIDE INPUT-TO-OUTPUT SAMPLING RANGE: 16:1 to 1:16
  • SUPPORTS INPUT AND OUTPUT SAMPLING RATES UP TO 212kHz
  • DYNAMIC RANGE: 144dB (–60dbFS Input, BW = 20Hz to fs/2)
  • THD+N: –140dB (0dbFS Input, BW = 20Hz to fs/2)
  • HIGH-PERFORMANCE, LINEAR-PHASE DIGITAL FILTERING WITH BETTER THAN 140dB OF STOP BAND ATTENUATION
  • 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
  • SUPPORTS 24-, 20-, 18-, or 16-BIT INPUT AND OUTPUT DATA
    • All Output Data is Dithered from the Internal 28-Bit Data Path
  • SERIAL PERIPHERAL INTERFACE (SPI)™ PORT SUPPORTS REGISTER READ AND WRITE OPERATIONS IN SOFTWARE MODE
  • BYPASS MODE
    • Routes Input Port Data Directly to the Output Port
  • FOUR GROUP DELAY OPTIONS FOR THE INTERPOLATION FILTER
  • DIRECT DOWNSAMPLING OPTION FOR THE DECIMATION FILTER
  • DIGITAL DE-EMPHASIS FILTER
    • User-Selectable for 32kHz, 44.1kHz, and 48kHz Sampling Rates
  • SOFT MUTE FUNCTION
  • PROGRAMMABLE DIGITAL OUTPUT ATTENUATION (SOFTWARE MODE ONLY)
    • 256 Steps: 0dB to –127.5dB with 0.5dB Steps
  • INPUT-TO-OUTPUT SAMPLING RATIO READBACK (SOFTWARE MODE ONLY)
  • POWER-DOWN MODES
  • SUPPORTS OPERATION FROM A SINGLE +1.8V or +3.3V POWER SUPPLY
  • AVAILABLE IN A TQFP-64 PACKAGE
  • APPLICATIONS
    • DIGITAL MIXING CONSOLES
    • DIGITAL AUDIO WORKSTATIONS
    • AUDIO DISTRIBUTION SYSTEMS
    • BROADCAST STUDIO EQUIPMENT
    • GENERAL DIGITAL AUDIO PROCESSING

U.S. Patent No. 7,262,716.
All trademarks are the property of their respective owners.

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.

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.

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* Data sheet 4-Channel, Asynchronous Sample Rate Converter datasheet (Rev. B) 13 Sep 2007
User guide SRC4194EVM - User Guide 24 Jun 2004

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Evaluation board

SRC4194EVM — SRC4194EVM Evaluation Module (EVM)

The SRC4194EVM provides a hardware platform for evaluating the SRC4194 4-channel asynchronous sample rate converter. The EVM contains multiple audio input and out port interfaces, reference clock generation circuitry, switches for Hardware mode configuration including logic functions. A buffered (...)

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