描述 Description

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 (VIO) 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.

特性 Features

? 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 fS/2, A-Weighted)
? THD+N: –140 dB (0-dbFS Input, BW = 20 Hz to fS/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)