SRC4193 - High-End Sample Rate Converter

The SRC4192 and SRC4193 devices are asynchronous, sample-rate converters designed for professional and broadcast audio applications. The SRC4192 and SRC4193 devices combine a wide input-to-output sampling ratio with outstanding dynamic range and ultra-low distortion. Input and output serial ports support standard audio formats, as well as a Time Division Multiplexed (TDM) mode. Flexible audio interfaces allow the SRC4192 and SRC4193 devices to connect to a wide range of audio data converters, digital audio receivers and transmitters, and digital signal processors.

The SRC4192 device is a standalone, pin-programmed device, with control pins for mode, data format, mute, bypass, and low group-delay functions. The SRC4193 device is a software-controlled device featuring a serial peripheral interface (SPI) port, which is utilized to program all functions through the internal control registers.

The SRC4192 and SRC4193 devices can operate from a single 3.3-V power supply. A separate digital I/O supply (V_IO) operates over the 1.65-V to 3.6-V supply range, allowing greater flexibility when interfacing to current and future generation signal processors and logic devices. Both devices are available in a 28-pin SSOP package.

• Automatic Sensing of the Input-to-Output
  Sampling Ratio
• Wide Input-to-Output Sampling Range: 16:1 to
  1:16
• Supports Input and Output Sampling Rates Up to
  212 kHz
• Dynamic Range: 144 dB (–60-dbFS Input, BW =
  20 Hz to f_S/2, A-Weighted)
• THD+N: –140 dB (0-dbFS Input, BW = 20 Hz to
  f_S/2)
• Attenuates Sampling and Reference Clock Jitter
• High-Performance, Linear-Phase Digital Filtering
  with Stop Band Attenuation Greater than 140 dB
• Flexible Audio Serial Ports:
  • Master or Slave-Mode Operation
  • Supports I²S, Left-Justified, Right-Justified,
    and TDM Data Formats
  • Supports 16, 18, 20, or 24-Bit Audio Data
  • TDM Mode Allows Daisy-Chaining of up to
    Eight Devices
• Supports 24-, 20-, 18-, or 16-Bit Input and Output
  Data: All Output Data is Dithered from the Internal
  28-Bit Data Path
• Low Group Delay Option for Interpolation Filter
• Direct Downsampling Option for Decimation Filter
  (SRC4193 Only)
• SPI Port Provides Access to Internal Control
  Registers (SRC4193 Only)
• Soft Mute Function
• Bypass Mode
• Programmable Digital Output Attenuation
  (SRC4193 Only); 256 Steps: 0 dB to –127.5 dB,
  0.5-dB/step
• Power Down Mode
• Operates From a Single 3.3-V Power Supply
• Small 28-Pin SSOP Package
• Pin Compatible with the AD1896 (SRC4192 Only)