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Questions on DAC TLV320DAC3120 features

Vigneshwaran JN
Prodigy 140 points
Other Parts Discussed in Thread: TLV320DAC3120

Hi,

Please suggest me on the following queries on the DAC TLV320DAC3120.

1.How to monitor the I2S input of the DAC. Is there any method to know if the I2S input to the DAC has stopped?

2.Is there a Play\Pause feature in TLV320DAC3120? If yes how could it be implemented?

3.What is the recommended reference clock input frequency for the DAC?

Thanks for your support in advance.

  • 0
    TI__Guru 62386 points

    1: Does this refer to a zero input on DIN or to stopped clocks? For the former, you could implement a process flow using PPS that checks the input data against a threshold and then set a flag in the register map to indicate a zero input. If you stop the clocks, you can't detect this directly with the DAC3120

    2: No, the DAC3120 requires a host controller to implement play or pause.

    3: The DAC3120 has a very flexible PLL so there is no recommended master clock frequency. However, if you want to configure the device for lowest power consumption, it may be beneficial to use a master clock that is an integer multiple of the sampling rate, oversampling rate and internal clock multipliers. For example, 48kHz sampling rate, OSR of 128, N*M = 4 gives you a recommended master clock of 24.576MHz.