Important: For full functionality of this site it is necessary to enable JavaScript. Here are the instructions how to enable JavaScript in your web browser.

Amplifiers

Q&A ADA4350: On-Resistance

Amplifiers requires membership for participation - click to join

State Verified Answer
Replies 3 replies
Answers 1 answer
Subscribers 1370 subscribers
Views 669 views
Users 0 members are here

Options

Related

ADA4350: On-Resistance

Mr.K over 6 years ago

Hello,

I will connect the SWA_OUT pin of ADA4350 with an outside inverting amplifier circuit.

I do not use the ADC DRIVER of ADA4350.

The ADA4350 has the switch, and the on-resistance is hundreds of ohms.

I think that the on-resistance is too large to connect SWA_OUT pin directly with the inverting amplification circuit.

Should I include the buffer between SWA_OUT pin and the inverting amplification circuit?

Best Regards,

Mr.K

Top Replies

ADIApproved over 6 years ago +1 verified

Hi, Mr. K.

For Figure 1, the on-resistance of S0 to S5 will be cancelled in the TIA

But S6 to S11 will be added to Rg of your inverting amp A.

To eliminate the effect of S6 to S11, use Figure 2.
…

Parents

0 ADIApproved over 6 years ago

Hi, Mr. K.

Can you please tell us what buffer will you use and why the on-resisance of the switch of the ADA4350 is very critical in your system? Can you share us your application so we would know how to help you?

Thanks,

Anna
Cancel
Up 0 Down

Reply

Verify Answer

Cancel

Reply

0 ADIApproved over 6 years ago

Hi, Mr. K.

Can you please tell us what buffer will you use and why the on-resisance of the switch of the ADA4350 is very critical in your system? Can you share us your application so we would know how to help you?

Thanks,

Anna
Cancel
Up 0 Down

Reply

Verify Answer

Cancel

Children

No Data