tpa6130a2 common mode input range

Fred P

On datasheet's page 13 we can read:

"The dc input-blocking capacitors may be removed provided the inputs are connected differentially and within the
input common mode range of the amplifier, the audio signal does not exceed ±3 V, and pop performance is
sufficient."

I can't find the common mode input range specification in the datasheet and I would like to know it so to get rid of these input caps.

Thanks

over 12 years ago

0 Don Dapkus over 12 years ago

TI__Guru**** 189401 points

Hi, Fred,

The inputs are biased at ground, and can accept an audio signal of +/-3V amplitude.

Note, to eliminate the input caps, you must use a differential source.

-d2

0 Fred P over 12 years ago in reply to Don Dapkus

Expert 2235 points

Hi Don,

Thanks for your efforts but that leaves my question intact: What is the common-mode input voltage range?

I understand very well that a ±3V signal centered at ground will work, but what about a ±1V signal centered at 1.65V?

I took good note of the need for a diff source.

0 David McRell over 11 years ago in reply to Don Dapkus

Intellectual 445 points

Hello,

Don Dapkus said:

The inputs are biased at ground, and can accept an audio signal of +/-3V amplitude.

3V peak or RMS?

Thanks,

David

0 David McRell over 11 years ago in reply to David McRell

Intellectual 445 points

I was reminded of the specification: max input is -2.7V~3.6V peak, page 4, Absolute Maximum Ratings.

Thanks,

David

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tpa6130a2 common mode input range