ZHCS094A September   2008  – November 2014 PCM3070

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 LP38690 的
  5. 5 修订历史记录
  6. 6 Device Comparison Table
  7. 7 Pin Configuration and Functions
  8. 8 Specifications
    1. 8.1  Absolute Maximum Ratings
    2. 8.2  Handling Ratings
    3. 8.3  Recommended Operating Conditions
    4. 8.4  Thermal Information
    5. 8.5  Electrical Characteristics, ADC
    6. 8.6  Electrical Characteristics, Bypass Outputs
    7. 8.7  Electrical Characteristics, Audio DAC Outputs
    8. 8.8  Electrical Characteristics, LDO
    9. 8.9  Electrical Characteristics, Misc.
    10. 8.10 Electrical Characteristics, Logic Levels
    11. 8.11 I2S LJF and RJF Timing in Master Mode (see )
    12. 8.12 I2S LJF and RJF Timing in Slave Mode (see )
    13. 8.13 DSP Timing in Master Mode (see )
    14. 8.14 DSP Timing in Slave Mode (see )
    15. 8.15 I2C Interface Timing
    16. 8.16 SPI Interface Timing (See )
    17. 8.17 Typical Characteristics
      1. 8.17.1 Typical Performance
      2. 8.17.2 Typical Characteristics, FFT
  9. 9 Parameter Measurement Information
  10. 10Detailed Description
    1. 10.1 Overview
    2. 10.2 Functional Block Diagram
    3. 10.3 Feature Description
      1. 10.3.1 Device Connections
        1. 10.3.1.1 Digital Pins
          1. 10.3.1.1.1 Multifunction Pins
        2. 10.3.1.2 Analog Pins
      2. 10.3.2 Analog Audio I/O
        1. 10.3.2.1 Analog Bypass
        2. 10.3.2.2 ADC Bypass Using Mixer Amplifiers
        3. 10.3.2.3 Headphone Output
        4. 10.3.2.4 Line Outputs
      3. 10.3.3 ADC
        1. 10.3.3.1 ADC Processing
          1. 10.3.3.1.1 ADC Processing Blocks
      4. 10.3.4 DAC
        1. 10.3.4.1 DAC Processing Blocks — Overview
      5. 10.3.5 Digital Audio IO Interface
      6. 10.3.6 Clock Generation and PLL
      7. 10.3.7 Control Interfaces
        1. 10.3.7.1 I2C Control
        2. 10.3.7.2 SPI Control
    4. 10.4 Device Functional Modes
      1. 10.4.1 MiniDSP
      2. 10.4.2 Software
    5. 10.5 Register Map
      1. 10.5.1 Register Map Summary
  11. 11Application and Implementation
    1. 11.1 Application Information
    2. 11.2 Typical Application
      1. 11.2.1 Design Requirements
        1. 11.2.1.1 Reference Filtering Capacitor
      2. 11.2.2 Detailed Design Procedures
        1. 11.2.2.1 Analog Input Connection
        2. 11.2.2.2 Analog Output Connection
      3. 11.2.3 Application Curves
  12. 12Power Supply Recommendations
  13. 13Layout
    1. 13.1 Layout Guidelines
    2. 13.2 Layout Example
  14. 14器件和文档支持
    1. 14.1 文档支持
      1. 14.1.1 相关文档
    2. 14.2 商标
    3. 14.3 静电放电警告
    4. 14.4 Glossary
  15. 15机械封装和可订购信息

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

12 Power Supply Recommendations

To power up the device, a 3.3V system rail (1.9V to 3.6V) can be used. The IOVDD voltage can be in the range of 1.1V – 3.6V. Internal LDOs can generate the appropriate digital and analog core voltages when configured to do so. For maximum flexibility, the respective voltages can also be supplied externally, bypassing the built-in LDOs. To support high-output drive capabilities, the output stages of the output amplifiers can be driven from the analog core voltage or the 1.9…3.6V rail used for the LDO inputs (LDO_in).

The AVDD and LDOIN power inputs are used to power the analog circuits including analog to digital converters, digital to analog converters, programmable gain amplifiers, headphone amplifiers, etc. The analog blocks in PCM3070 have high power supply rejection ratio, however it is recommended that these supplies be powered by well regulated power supplies like low dropout regulators (LDO) for optimal performance. When these power terminals are driven from a common power source, the current drawn from the source will depend upon blocks enabled inside the device. However as an example when all the internal blocks powered are enabled the source should be able to deliver 150mA of current.

The DVDD powers the digital core of PCM3070, including the miniDSP, the audio serial interface, control interfaces (SPI or I2C), clock generation and PLL. The DVDD power can be driven by high efficiency switching regulators or low drop out regulators. When the miniDSP_A and miniDSP_D are enabled in programmable mode and operated at peak frequencies, the supply source should be able to able to deliver approx 100mA of current. When the PRB modes are used instead of programmable miniDSP mode, then the peak current load on DVDD supply source could be approximately 20 mA.

The IOVDD powers the digital input and digital output buffers of PCM3070. The current consumption of this power depends on configuration of digital terminals as inputs or outputs. When the digital terminals are configured as outputs, the current consumption would depend on switching frequency of the signal and the load on the output terminal, which depends on board design and input capacitance of other devices connected to the signal.

Refer to Figure 19 for recommendations on decoupling capacitors.

For more detailed information see the PCM3070 Application Reference Guide, SLAU332.

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