SLAS510G March   2007  – February 2021 TLV320AIC3104


  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Description (Continued)
  6. Device Comparison Table
  7. Pin Configuration and Functions
  8. Specifications
    1. 8.1 Absolute Maximum Ratings
    2. 8.2 ESD Ratings
    3. 8.3 Recommended Operating Conditions
    4. 8.4 Thermal Information
    5. 8.5 Electrical Characteristics
    6. 8.6 Audio Data Serial Interface Timing Requirements
    7. 8.7 Timing Diagrams
    8. 8.8 Typical Characteristics
  9. Parameter Measurement Information
  10. 10Detailed Description
    1. 10.1 Overview
    2. 10.2 Functional Block Diagrams
    3. 10.3 Feature Description
      1. 10.3.1  Hardware Reset
      2. 10.3.2  Digital Audio Data Serial Interface
        1. Right-Justified Mode
        2. Left-Justified Mode
        3. I2S Mode
        4. DSP Mode
        5. TDM Data Transfer
      3. 10.3.3  Audio Data Converters
        1. Audio Clock Generation
        2. Stereo Audio ADC
          1. Stereo Audio ADC High-Pass Filter
          2. Automatic Gain Control (AGC)
            1. Target Level
            2. Attack Time
            3. Decay Time
            4. Noise Gate Threshold
            5. Maximum PGA Gain Applicable
      4. 10.3.4  Stereo Audio DAC
        1. Digital Audio Processing for Playback
        2. Digital Interpolation Filter
        3. Delta-Sigma Audio DAC
        4. Audio DAC Digital Volume Control
        5. Increasing DAC Dynamic Range
        6. Analog Output Common-Mode Adjustment
        7. Audio DAC Power Control
      5. 10.3.5  Audio Analog Inputs
      6. 10.3.6  Analog Fully Differential Line Output Drivers
      7. 10.3.7  Analog High-Power Output Drivers
      8. 10.3.8  Input Impedance and VCM Control
      9. 10.3.9  MICBIAS Generation
      10. 10.3.10 Short-Circuit Output Protection
      11. 10.3.11 Jack and Headset Detection
    4. 10.4 Device Functional Modes
      1. 10.4.1 Bypass Path Mode
        1. ADC PGA Signal Bypass Path Functionality
        2. Passive Analog Bypass During Power Down
      2. 10.4.2 Digital Audio Processing for Record Path
    5. 10.5 Programming
      1. 10.5.1 I2C Control Interface
        1. I2C Bus Debug in a Glitched System
      2. 10.5.2 Register Map Structure
    6. 10.6 Register Maps
      1. 10.6.1 Output Stage Volume Controls
  11. 11Application and Implementation
    1. 11.1 Application Information
    2. 11.2 Typical Applications
      1. 11.2.1 Typical Connections With Headphone and External Speaker Driver in Portable Application
        1. Design Requirements
        2. Detailed Design Procedure
        3. Application Curves
      2. 11.2.2 Typical Connections for AC-Coupled Headphone Output With Separate Line Outputs and External Speaker Amplifier
        1. Design Requirements
        2. Detailed Design Procedure
        3. Application Curves
  12. 12Power Supply Recommendations
  13. 13Layout
    1. 13.1 Layout Guidelines
    2. 13.2 Layout Example
  14. 14Device and Documentation Support
    1. 14.1 Receiving Notification of Documentation Updates
    2. 14.2 Support Resources
    3. 14.3 Trademarks
    4. 14.4 Electrostatic Discharge Caution
    5. 14.5 Glossary

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • RHB|32
Thermal pad, mechanical data (Package|Pins)
Orderable Information

Audio DAC Digital Volume Control

The audio DAC includes a digital volume control block which implements a programmable digital gain. The volume level can be varied from 0 dB to –63.5 dB in 0.5-dB steps, or set to mute, independently for each channel. The volume level of both channels can also be changed simultaneously by the master volume control. Gain changes are implemented with a soft-stepping algorithm, which only changes the actual volume by one step per input sample, either up or down, until the desired volume is reached. The rate of soft-stepping can be slowed to one step per two input samples through a register bit.

Because of soft-stepping, the host does not know when the DAC has been actually muted. This may be important if the host wishes to mute the DAC before making a significant change, such as changing sample rates. In order to help with this situation, the device provides a flag back to the host via a read-only register bit that alerts the host when the part has completed the soft-stepping and the actual volume has reached the desired volume level. The soft-stepping feature can be disabled through register programming. If soft-stepping is enabled, the MCLK signal should be kept applied to the device until the DAC power-down flag is set. When this flag is set, the internal soft-stepping process and power-down sequence is complete, and the MCLK can then be stopped if desired.

The TLV320AIC3104 also includes functionality to detect when the user changes the selection of de-emphasis or digital audio processing functionality. When the new selection is detected, the TLV320AIC3104 (1) soft-mutes the DAC volume control, (2) changes the operation of the digital effects processing to match the new selection, and (3) soft-unmutes the device. This avoids any possible pop or clicks in the audio output due to instantaneous changes in the filtering. A similar algorithm is used when first powering up or powering down the DAC. The circuit begins operation at power up with the volume control muted, then soft-steps it up to the desired volume level. At power down, the logic first soft-steps the volume down to a mute level, then powers down the circuitry.