TLV320ADC3101: Reference volatage of DOUT on TLV320ADC3101

burton hui

Prodigy 40 points

Part Number: TLV320ADC3101

Hi,

I am using TLV320ADC3101 but I have no idea how to check/configure Reference voltage of DOUT PIN

Can you help me？

Thanks，

Burton

over 3 years ago

0 Tom Hendrick over 3 years ago

TI__Guru**** 168605 points

Hi Burton,

Welcome to our e2e forum! I'm not sure that I understand your question - are you asking about the logic levels of the TLV320ADC3101 DOUT pin? DOUT is related to the IOVDD voltage, a logic high is 80% of IOVDD (minimum). See the Digital I/O section on page 7 of the datasheet.

0 burton hui over 2 years ago in reply to Tom Hendrick

Prodigy 40 points

Sorry Tom. What I want to know is reference voltage of TLV320ADC3101

For example 24 bits data. If I want to calculate input analog voltage, the formula as below

V(in) = V(ref) * Dout Value / 2^24

Currently I can get Dout Value with I2S, but Idon't know how to check/configure V(ref) which is reference voltage of TLV320ADC3101

I got some information from otherwhere "Reference voltage is sourced from AVDD through a band gap reference." But this isn't enough to me, I want to know more details.

Thanks,

Burton

0 burton hui over 2 years ago

Prodigy 40 points

Let me try to ask this question in another way.

How Can I calculate real-time input voltage of analog pins such as IN1L(P) with DOUT I2S output results ?

+1 Tom Hendrick over 2 years ago in reply to burton hui

TI__Guru**** 168605 points

Hi Burton,

I see you posted the query again on another thread. Are you clear now on the output versus input voltage or do you still have more questions?

+1 burton hui over 2 years ago in reply to Tom Hendrick

Prodigy 40 points

Tom,

I am clear now on the input voltage. Thank you and Collin very much.

I have no more questions

Thanks,

Burton

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TLV320ADC3101: Reference volatage of DOUT on TLV320ADC3101