Overview
The SRC4392IPFB, produced by Texas Instruments, is a highly integrated CMOS device designed for professional and broadcast digital audio systems. This component combines a high-performance, two-channel, asynchronous sample rate converter (SRC) with a digital audio interface receiver (DIR) and transmitter (DIT). It supports a wide range of sampling rates and audio formats, making it versatile for various audio applications.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Input or Output Sampling Rate (fSIN or fSOUT) | 4 | 216 | kHz | ||
| Input-to-Output Sampling Ratio | 1:16 | 16:1 | |||
| Dynamic Range (no weighting filter applied) | fSIN:fSOUT = 192kHz:44.1kHz | 142 | dB | ||
| Total Harmonic Distortion + Noise (THD+N) | fSIN:fSOUT = 44.1kHz:44.1kHz | -140 | dB | ||
| PLL Lock Range | 20 | 216 | kHz | ||
| Master Clock Input (MCLK) Frequency | 1 | 27.7 | MHz | ||
| Power Supplies | VDD18 | -0.3 | 1.8 | 2.0 | V |
| Power Supplies | VDD33 | -0.3 | 3.3 | 4.0 | V |
Key Features
- Two-channel asynchronous sample rate converter (SRC) with integrated digital audio interface receiver (DIR) and transmitter (DIT)
- Supports sampling rates up to 216kHz and input-to-output sampling ratios from 1:16 to 16:1
- Dynamic range of up to 144dB (A-weighted) and total harmonic distortion + noise (THD+N) of -140dB
- Includes four differential input line receivers and an input multiplexer
- Supports audio input and output data word lengths up to 24 bits
- Automatic detection of non-PCM audio streams and audio CD Q-channel sub-code decoding
- Digital de-emphasis filtering for 32kHz, 44.1kHz, and 48kHz input sampling rates
- Two audio serial ports (Ports A and B) supporting left-justified, right-justified, and Philips I2S data formats
- User-selectable serial host interface: SPI or Philips I2C
- Extensive power-down support and multifunction programmable general-purpose digital outputs
Applications
- Digital audio interfaces for computers
- Digital audio routers and distribution systems
- Broadcast studio equipment
- DVD/CD recorders
- Surround sound decoders and A/V receivers
- Car audio systems
Q & A
- What is the primary function of the SRC4392?
The SRC4392 is a two-channel asynchronous sample rate converter with integrated digital audio interface receiver and transmitter.
- What is the range of sampling rates supported by the SRC4392?
The SRC4392 supports sampling rates from 4kHz to 216kHz.
- What is the dynamic range of the SRC4392?
The dynamic range is up to 144dB (A-weighted).
- Does the SRC4392 support multiple audio formats?
Yes, it supports left-justified, right-justified, and Philips I2S data formats.
- What are the power supply requirements for the SRC4392?
The SRC4392 requires a +1.8V core logic supply and a +3.3V supply for the DIR, DIT, and line driver and receiver functions.
- Can the SRC4392 be controlled via different interfaces?
Yes, it supports both SPI and Philips I2C interfaces.
- What kind of audio streams does the SRC4392 automatically detect?
The SRC4392 automatically detects non-PCM audio streams such as DTS CD/LD and IEC 61937 formats.
- Does the SRC4392 have power-down capabilities?
Yes, it has extensive power-down support to conserve power when not in use.
- In what packages is the SRC4392 available?
The SRC4392 is available in QFN-40 and TQFP-48 packages.
- What are some common applications of the SRC4392?
Common applications include digital audio interfaces for computers, broadcast studio equipment, DVD/CD recorders, and car audio systems.
