AMC1200-Q1: Output common-mode voltage

NAOKI AOYAMA

Guru 11215 points

Part Number: AMC1200-Q1
Other Parts Discussed in Thread: AMC1200

Hello,

I checked the specification of output common-mode voltage on the datasheet.

The value is 1.15V (min) , 1.45V (max) at VDD2 from 2.7V to 3.6V.

It seems to be a big variation.

Could you tell me how about the generation of common-mode voltage?

Does it make by voltage divider?

Best Regards,

Naoki Aoyama

over 8 years ago

0 Tom Hendrick over 8 years ago

TI__Guru**** 182601 points

Hi Naoki,

The output common-mode for the AMC1200-Q1 is typically 1.29 V with VDD2 between 2.7 V and 3.3 V. It is not set by a resistive divider.

0 NAOKI AOYAMA over 8 years ago in reply to Tom Hendrick

Guru 11215 points

Hi Tom,

Thank you for your reply.
I understood that it is not set by a resistive divider.
Is it correlated VDD2 and output common mode voltage?

Because the big variation of output common mode voltage and
the AMC1200 does not have a VCOM pin,
it is difficult to connect ADC directly.

Regards,
Naoki Aoyama

0 NAOKI AOYAMA over 8 years ago in reply to Tom Hendrick

Guru 11215 points

Hi Tom,

Sorry for my poor check the DS.
It is mentioned at function block diagram on the DS.
The voltage reference will generate a common mode voltage.

Thanks,
Naoki Aoyama

Amplifiers

Amplifiers forum

AMC1200-Q1: Output common-mode voltage