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TAC5212: Selecting audio codec and amplifiers

Artur Romaniuk
Prodigy 10 points

Part Number: TAC5212
Other Parts Discussed in Thread: TAC5412-Q1

I am reaching out to discuss Texas Instruments' portfolio of audio codecs and amplifiers. We are currently working on a project to develop a replacement for an existing audio device and would like to analyze available solutions that meet the following requirements:

  1. Dual microphone inputs (supporting both single-ended and differential configurations).
  2. Support for two stereo outputs.
  3. Capable of driving headphones with an impedance range of 20 to 600+ Ohms, as well as 8 Ohm speakers.
  4. Data transmission via TDM and control/communication via I2C.
  5. Solutions facilitating automatic headset detection (specifically impedance measurement for both microphones and headphones).
  6. Integrated mechanisms for system health monitoring and diagnostics.

We would appreciate the opportunity to schedule an online meeting to discuss your product roadmap and the technical details of these solutions.

Looking forward to your feedback.

  • 0
    TI__Mastermind 20466 points

    Hi Artur,

    TAC5212 has 2 ADC channels to support dual microphone inputs, can support 2 stereo single-ended outputs, and can drive headphone loads up to 600ohms (above this will be considered line-out, but is also supported). However, this codec will have to be paired with an amp to drive a speaker.

    TDM and I2C are both supported, as well as headset detection: Headset Detection for TAx52xx Family

    TAC5212 does not have much in terms of diagnostics, you can see what is offered in the diagnostics registers Page 0x01 starting on page 154 of the datasheet.

    Best,

    Garret

  • 0 in reply to Garret Godfrey
    Prodigy 10 points

    TAC5412-Q1 looks better in terms of diagnostics.
    By headset detection I mean detecting a specific model recognition by measuring frequency response of the headset + impedance measurement of a microphone. This is a ruggedized device, there is no standard headphones jack.

    In the current design we are using 2 separate audio paths for each headset. Each audio path consists of:
    - stereo codec
    - additional mic bias 0V-10V (codec has only 3V)
    - Left and Right differential outputs, each pair going to the OpAmp (15V, 300mA, for supporting wide range of connected devices)

    For additional detection and diagnostics we have:
    - Mic input to an external ADC through a low-pass filter for power draw at rest measurement (mic model detection + mic connection detection)
    - Audio out connected to the same ADC for the same purpose
    - Audio out looped-back to line-in input in the codec for diagnostics and frequency response measurement (headset model detection)

    While designing the new revision we would like to simplify the design while preserving the same functionality. Are there any TI solutions that can help us achieve that?
    Replacing an OpAmp is also important as currently used one is obsolete, so maybe You could recommend some parts for driving both wide range of headphones and small speakers? 

  • 0 in reply to Artur Romaniuk
    TI__Mastermind 20466 points

    Hi Artur,

    Artur Romaniuk said:
    In the current design we are using 2 separate audio paths for each headset. Each audio path consists of:
    - stereo codec
    - additional mic bias 0V-10V (codec has only 3V)
    - Left and Right differential outputs, each pair going to the OpAmp (15V, 300mA, for supporting wide range of connected devices)

    The TAC5412-Q1 can serve this application. It is a high-voltage device that can support up to a 10V MICBIAS output. 

    However, since this codec only has a stereo ADC, there are no additional channels for the diagnostics you require.

    TLV320AIC34 is one of our few codecs with more than 2 ADC channels, and also has headphone and speaker drivers. However, it is a low voltage part, and only supports up to 2.5V MICBIAS.

    For specific OpAmp recommendations, you will have to make a new thread as our audio amplifiers portfolio is run by an adjacent team.

    Best,

    Garret