SBFS038A June   2012  – September 2015 PCM2903C

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Typical Characteristics
      1. 7.6.1  Typical Characteristics: ADC
      2. 7.6.2  Typical Characteristics: DAC
      3. 7.6.3  Typical Characteristics: ADC Output Spectrum
      4. 7.6.4  Typical Characteristics: DAC Output Spectrum
      5. 7.6.5  Typical Characteristics: Supply Current
      6. 7.6.6  Typical Characteristics: ADC Digital Decimation Filter Frequency Response
      7. 7.6.7  Typical Characteristics: ADC Digital High-Pass Filter Frequency Response
      8. 7.6.8  Typical Characteristics: ADC Analog Antialiasing Filter Frequency Response
      9. 7.6.9  Typical Characteristics: DAC Digital Interpolation Filter Frequency Response
      10. 7.6.10 Typical Characteristics: DAC Analog Fir Filter Frequency Response
      11. 7.6.11 Typical Characteristics: DAC Analog Low-Pass Filter Frequency Response
  8. 8 Parameter Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 End-Points
      2. 9.3.2 Clock and Reset
      3. 9.3.3 Digital Audio Interface
      4. 9.3.4 Supported Input/Output Data
      5. 9.3.5 Channel Status Information
      6. 9.3.6 Copyright Management
    4. 9.4 Device Functional Modes
    5. 9.5 Programming
      1. 9.5.1 USB Interface
      2. 9.5.2 Device Configuration
        1. 9.5.2.1 Interface Number 0
        2. 9.5.2.2 Interface Number 1
        3. 9.5.2.3 Interface Number 2
        4. 9.5.2.4 Interface Number 3
      3. 9.5.3 Interface Sequence
        1. 9.5.3.1 Power On, Attach, and Playback Sequence
        2. 9.5.3.2 Play, Stop, and Detach Sequence
        3. 9.5.3.3 Record Sequence
        4. 9.5.3.4 Suspend and Resume Sequence
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
      3. 10.2.3 Application Curves
  11. 11Power Supply Recommendations
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Documentation Support
      1. 13.1.1 Related Documentation
    2. 13.2 Community Resources
    3. 13.3 Trademarks
    4. 13.4 Electrostatic Discharge Caution
    5. 13.5 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

10 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.

10.1 Application Information

The VBUS allows the device to know when it has been plugged to a USB connection port. The SSPND’ flag will notify when the USB input is idle for at least 5ms; this flag can be used to control or notify subsequent circuits. More functional details can be found on Interface Sequence.

10.2 Typical Application

Figure 41 illustrates a typical circuit connection for a simple application. The circuit illustrated is for information only. The entire board design should be considered to meet the USB specification as a USB-compliant product.

PCM2903C self-pwr_config_bfs038.gif

NOTE:


IC1 must be driven by VDD with a 5-V tolerant input.
C1, C2, C3, C4, C7, C8: 10 μF
C5, C6: 10 pF to 33 pF (depending on crystal resonator)
C9, C10, C11, C12: The capacitance may vary depending on design.
Figure 41. Self-Powered Configuration

10.2.1 Design Requirements

For this example, Table 6 lists the design parameters.

Table 6. Design Parameters

DESIGN PARAMETER EXAMPLE VALUE
Input voltage range 3 V to 3.6 V
Current 50 mA to 70 mA
Input clock frequency 11.994 MHz to 12.006 MHz

10.2.2 Detailed Design Procedure

The PCM2903C is a simple design device since it is capable to connect directly to a USB port. Only two external ICs are needed, a 3.3-V regulator and an AND Gate. The switches connected to the HID ports must be normally open. Other than this, it only needs decoupling capacitors on the voltage source pins.

10.2.3 Application Curves

PCM2903C g003_bfs038.gif Figure 42. ADC Total Harmonic Distortion + Noise at –1 dB vs Supply Voltage
PCM2903C g009_bfs038.gif Figure 44. DAC Total Harmonic Distortion + Noise at 0 dB vs Supply Voltage
PCM2903C g017_bfs038.gif Figure 46. Operational and Suspend Supply Current vs Supply Voltage
PCM2903C g004_bfs038.gif Figure 43. ADC Dynamic Range and SNR vs Supply Voltage
PCM2903C g010_bfs038.gif Figure 45. DAC Dynamic Range and SNR vs Supply Voltage
PCM2903C g018_bfs038.gif Figure 47. Operational Supply Current vs Sampling Frequency