SCDS457A may   2023  – june 2023 TMUX4827

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Pin Configuration and Functions
  7. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Thermal Information
    4. 6.4 Recommended Operating Conditions
    5. 6.5 Source or Drain Continuous Current
    6. 6.6 Source or Drain RMS Current
    7. 6.7 Electrical Characteristics 
    8. 6.8 Switching Characteristics 
    9. 6.9 Typical Characteristics
  8. 7 Parameter Measurement Information
    1. 7.1  On-Resistance
    2. 7.2  On-Leakage Current
    3. 7.3  Off-Leakage Current
    4. 7.4  Power-Off Leakage Current
    5. 7.5  Propagation Delay
    6. 7.6  tON (VDD) and tOFF (VDD) Time
    7. 7.7  Transition Time
    8. 7.8  Break-Before-Make
    9. 7.9  THD + Noise
    10. 7.10 Power Supply Rejection Ratio (PSRR)
    11. 7.11 Charge Injection
    12. 7.12 Bandwidth
    13. 7.13 Off Isolation
    14. 7.14 Crosstalk
  9. 8 Detailed Description
    1. 8.1 Functional Block Diagram
    2. 8.2 Device Functional Modes
    3. 8.3 Feature Description
      1. 8.3.1 Beyond the Supply
      2. 8.3.2 Bidirectional Operation
      3. 8.3.3 Over Temperature Protection
      4. 8.3.4 Power-Off Protection
      5. 8.3.5 1.8 V Logic Compatible Inputs
      6. 8.3.6 Fail-Safe Logic
  10. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Applications
      1. 9.2.1 Audio Amplifier Switching
        1. 9.2.1.1 Design Requirements
        2. 9.2.1.2 Detailed Design Procedure
        3. 9.2.1.3 Application Curves
    3. 9.3 Power Supply Recommendations
    4. 9.4 Layout
      1. 9.4.1 Layout Guidelines
      2. 9.4.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Documentation Support
      1. 10.1.1 Related Documentation
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Mechanical, Packaging, and Orderable Information
    1. 11.1 Packaging Option Addendum
    2. 11.2 Tape and Reel Information
    3. 11.3 Mechanical Data

Package Options

Refer to the PDF data sheet for device specific package drawings

Mechanical Data (Package|Pins)
  • YBH|9
Thermal pad, mechanical data (Package|Pins)
Orderable Information

9.2.1 Audio Amplifier Switching

Often, there are multiple audio sources in a system giving the user options on which source will connect to the speaker. To enable switching between these sources, a TMUX4827 can be used. The line-in can be biased to a negative voltage, and class-D amplifier output can be higher than the typically used 3 V and 5 V supplies. So any circuitry connected needs to handle this bipolar voltage. This same scheme can be used in systems where there are multiple speaker outputs and one source as well. Here the switch is used to switch from an internal speaker to an external one. Figure 9-1 shows the block diagram for these applications. Here a TLV320AIC3x is used as an audio codec driving a TPA313x class D audio amplifier. Additionally, if IEC protection is needed on the external connectors (audio jack input or external speaker), then a 2 channel TPD2E007 can be used.

The TMUX4827 can be used to switch up to ±12 V with a supply voltage from 1.8 V to 5.5 V. The supply can also be driven directly with a GPIO, allowing the user to put the device into ultra-low power mode. In this mode, the TMUX4827 operates with powered-off protection, so any high voltage present on the inputs will not propagate to the outputs. This feature allows for the correct power up cycling and increases system robustness. Additionally, the TMUX4827 features excellent THD+N performance, so there is minimal impact to the audio signal quality through the switch. This allows the system designer to save a significant portion of board area without impacting signal integrity.

GUID-20220412-SS0I-JF5P-Z9F7-0KHHN2JN596B-low.svg Figure 9-1 Audio Amplifier Switching