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PCM4202: PCM4202DBR

Shiva Kiran
Prodigy 230 points

Part Number: PCM4202
Other Parts Discussed in Thread: TAA5242

Tool/software:

Hello,

In ADC part PCM4202DBR, there is a left channel and right channel. 

1. what is mean by left and right channel in 24 bit ADC. 

2. Is it mandatory to use both channels in the design?

  • 0
    TI__Mastermind 29180 points

    Hi Shiva, 

    1. Left and right channels are the analog inputs for a stereo audio signal. Stereo audio is two signals, left and right channel, summed together to a single sound from the same sound source. It is a single sound with three-dimensional characteristics like depth and width.

    This device allows two differential inputs for with 2 ADC, each differential input mapping to either the left or right channel.

    To better visualize the format of the PCM output, refer to Figure 3 of the datasheet. 

    Mono, on the contrary is one audio signal summed together on one line.

    2. Since the only output format supported is i2s, if you provide the input for only one channel, the subsequent left or right channel data will be appended with 0's. To capture complete audio I suggest using both channels.

    There are other hardware controlled ADC's that will have more flexibility in channel use and input configuration. I suggest looking at PCM182x (hardware controlled) or TAA5242 device.