INA118 SNR Deterioration of the Instrumentation Amplifier

Sadanori Kato

Other Parts Discussed in Thread: INA118, ADS7263, TINA-TI

Hi,

We have obtained one question from our customers.
Our customers will use the INA118 as the AD Driver for the ADS7263.
Although we think that the SNR will be changed in relation to cut-off frequency, gain settings, etc., we would like to calculate the SNR of this device.
Could you please tell us how to calculate or SNR values that you calculated or how to calculate by using the TINA-TI or send us the application notes as soon as possible?
There is no problem if the accuracy of the device is more than 14bit.
Could you please advise to us about it.

Best Regards,
Kato

over 12 years ago

0 Pete%20Semig over 12 years ago

TI__Mastermind 25815 points

Hello Kato,

Here is a link to an excellent article series on amplifier noise:

http://www.en-genius.net/site/zones/audiovideoZONE/technical_notes/avt_022508

Part 4 of the series (which is unfortunately mislabeled as Part 2 on the website) will be particularly useful because it explains how to simulate noise using TINA-TI. Here is the direct link to the article:

http://www.en-genius.net/includes/files/avt_011507.pdf

Also, I attached a presentation on instrumentation amplifier noise.

Between these two resources you should be able to gain an understanding of the amount of intrinsic noise the INA118 will introduce to the system.

If you have any issues with your TINA-TI simulation, please post it and we will take a look.

Instrumentation Amplifier Noise Analysis-clean.ppt

0 Sadanori Kato over 12 years ago in reply to Pete%20Semig

Guru 36540 points

Hi, Pete-san,

Thank you for your cooperation quickly.
The contents which you proposed were useful very much.
If our customers have any questions about the TINA-TI, could you please advise us?
Thank you so much.

Best Regards,
Kato

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INA118 SNR Deterioration of the Instrumentation Amplifier