TLV320ADC3001: Linux driver

Hi Mir

Thank you for your response. As you mentioned, the previous part i asked(TLV320ADC3001) is being old,
so i found another two TI ADC ICs that support MIC_BIAS: "TLV320ADC3120" and "PCM3120-Q1".
Both of these parts look p2p compatible, we would like to know do they have Linux drivers available?
or you can recommendation any other IC s with Linux driver support (only need Audio ADC convert, not codec), thanks.

Hi,

Most of our ADCs should support mic bias, so I hope any part that you choose will work for this. Have you already designed the board and you need it to be pin to pin compatible? What ADC features do you need, rather than just at least 2 channels and mic bias?

The TLV320ADC3120 does not have a Linux driver, but a similar device TLV320ADC3140 (quad channel) does. I do not think the PCM3120-Q1 has Linux drivers either.

I would recommend looking into the TLV320ADC3101 or TLV320ADC3100, these have Linux drivers and should work similarly to the TLV320ADC3001.

Let me know if you have any other needs for choosing a specific ADC, or if you need help implementing the device into your system.

Best,
Mir

Hi Mir

Sorry, I want to clarify that the current application only requires one microphone input, and it is single-ended. To avoid needing a driver,
I want to confirm that the PCM1822 can meet the requirements for pure hardware ADC conversion. The EVM description also states that it supports single-ended microphone input.
Could you please help me confirm the following matters regarding this IC? Thank you.

(1) Does the PCM1822 indeed support single-ended input?
(2) If using a single-ended input, can the negative terminal be directly connected to ground ?
(3) From the PCM1822 specifications, there is no description of a pin supporting MIC_BIAS. However, the EVK application uses FMT0 for microphone bias, while the specification states it is a digital input.
     Therefore, I would like to confirm whether this pin can be used as MIC_BIAS. (Picture 2) Thanks.