TLV320AIC3101: dual microphones design

CF Hsu

Part Number: TLV320AIC3101

I want to use TLV320AIC3101 with two independent microphones.
Could you help me check the design is valid or not?

0 Sakshi Markhedkar over 5 years ago

Hello,

Yes the mic connections look correct for two single-ended microphones integration.

Please refer to the the datasheet section 12.2.1 (www.ti.com/.../tlv320adc5140.pdf for similar use-case.

Regards,

Sakshi

0 CF Hsu over 5 years ago in reply to Sakshi Markhedkar

Dear Sakshi,

Thank you for your prompt reply.

Base on my application, Could you provide the corresponded register setting ? Thanks.

Regards,

0 Sakshi Markhedkar over 5 years ago in reply to CF Hsu

Hello,

Sharing an example of register setting configuring for the two single-ended microphones application:

#Assuming device address as 90h

w 90 19 c0 #Page 0 Register 25 MICBIAS output is powered up and is connected to AVDD level

#Page 0 Register 17 D7-D4 for MIC2L/LINE2LInput Level Control for Left-ADC PGA Mix

w 90 11 0f #Setting the input level control to 0 dB to connect MIC2L to the left-ADC PGA mix

#Page 0 Register 18 D3-D0 for MIC2R/LINE2R Input Level Control for Right-ADC PGA Mix

w 90 11 f0 #Setting the input level control to 0 dB to connect MIC2R to the Right-ADC PGA mix

Best Regards,

Sakshi

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