SBFS022C June   2003  – October 2015 SRC4192 , SRC4193

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Characteristics
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Input Port Operation
      2. 7.3.2 Output Port Operation
      3. 7.3.3 Soft Mute Function
      4. 7.3.4 Digital Attenuation (SRC4193 Only)
      5. 7.3.5 Ready Output
      6. 7.3.6 Ratio Output (SRC4193 Only)
      7. 7.3.7 Serial Peripheral Interface (SPI) Port: SRC4193 Only
    4. 7.4 Device Functional Modes
      1. 7.4.1 Reset and Power Down Operation
      2. 7.4.2 Audio Port Modes
      3. 7.4.3 Bypass Mode
    5. 7.5 Register Maps
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Interfacing to Digital Audio Receivers and Transmitters
      2. 8.1.2 TDM Applications
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Control Method
        2. 8.2.2.2 Audio Input and Output
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Reference Clock
      2. 10.1.2 Pin Compatibility With the Analog Devices AD1896 (SRC4192 Only)
        1. 10.1.2.1 Crystal Oscillator
        2. 10.1.2.2 Reference Clock Frequency
        3. 10.1.2.3 Master Mode Maximum Sampling Frequency
        4. 10.1.2.4 Matched Phase Mode
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Related Links
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

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発注情報

10 Layout

10.1 Layout Guidelines

10.1.1 Reference Clock

The SRC4192 and SRC4193 devices require a reference clock for operation. The reference clock is applied at the RCKI input (pin 1 for the SRC4193 device, pin 2 for the SRC4192 device). Figure 80 shows the reference clock connections and requirements for the SRC4192 and SRC4193 devices. The reference clock may operate at 128fS, 256fS, or 512fS, where fS are the input or output sampling frequency. The maximum external reference clock input frequency is 50 MHz.

SRC4192 SRC4193 ref_clock_input_conn.gif Figure 80. Reference Clock Input Connections and Timing Requirements

10.1.2 Pin Compatibility With the Analog Devices AD1896 (SRC4192 Only)

The SRC4192 device is pin-and function-compatible with the AD1896 device when observing the guidelines indicated in the following paragraphs.

10.1.2.1 Crystal Oscillator

The SRC4192 does not have an on-chip crystal oscillator. An external reference clock is required at the RCKI input (pin 2).

10.1.2.2 Reference Clock Frequency

The reference clock input frequency for the SRC4192 must be no higher than 30 MHz, to match the master clock frequency specification of the AD1896 device. In addition, the SRC4192 device does not support the 768fS reference clock rate.

10.1.2.3 Master Mode Maximum Sampling Frequency

When the input or output ports are set to master mode, the maximum sampling frequency must be limited to 96 kHz to support the AD1896 device specification. This is despite the fact that the SRC4192 device supports a maximum sampling frequency of 212 kHz in master mode. The user should consider building an option into their design to support the higher sampling frequency of the SRC4192 device.

10.1.2.4 Matched Phase Mode

Because of the internal architecture of the SRC4192 device, it does not require or support the matched phase mode of the AD1896 device. Given multiple SRC4192 devices, if all reference clock (RCKI) inputs are driven from the same clock source, the devices will be phase-matched.

10.2 Layout Example

SRC4192 SRC4193 layout_src4192_sbfs022.gif
1. TI recommends placing a top-layer ground pour for shielding around the SRC4192 device and connecting it to the lower main PCB-ground plane with multiple vias.
Figure 81. SRC4192 Layout Example
SRC4192 SRC4193 layout_src4193_sbfs022.gif
1. TI recommends placing a top-layer ground pour for shielding around the SRC4193 device and connecting it to the lower main PCB-ground plane with multiple vias.
Figure 82. SRC4193 Layout Example