Sample Rate Converter 64-Pin TQFP Tray

The SRC4184 is a four-channel, asynchronous sample rate converter (ASRC), designed for professional and broadcast audio applications. The SRC4184 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 SRC4184 to interface to a wide range of audio data converters, digital audio receivers and transmitters, and digital signal processors. The SRC4184 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 SRC4184 may be operated in Software mode, where a four-wire serial peripheral interface (SPI) port provides access to internal control and status registers. The SRC4184 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 SRC4184 also requires a digital I/O supply, which operates from +1.65V to +3.6V. The SRC4184 is available in a TQFP-64 package.

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: 128dB (–60dbFS Input, BW = 20Hz to f_s/2, A-Weighted)

THD+N: –125dB (0dbFS Input, BW = 20Hz to f_s/2)

HIGH-PERFORMANCE, LINEAR PHASE DIGITAL FILTERING

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