THS4551: THS4551 Support

Sooraj Surendran

Part Number: THS4551

We are using THS4551IDGKT FDA and cascaded the FDA in 2 numbers . Please find the attached schematic . Is this cascading fine .
We connected the Differential P to second differential Op amp input Postive and differential n to second differential op amp Negative . Please check the connection is correct .

over 2 years ago

0 Michael Steffes over 2 years ago

Guru 48395 points

I would have connected those feedback caps on the other side of the 15ohm inside the loop R's

0 Sooraj Surendran over 2 years ago in reply to Michael Steffes

Prodigy 90 points

Thank u .. is this cascaded connection is right .. for design . as here we are converting single ended to differential and then differential to differential with 2 stages differential amplifier ....

0 Sooraj Surendran over 2 years ago in reply to Sooraj Surendran

Prodigy 90 points

We used the FDA THS4551 , for single ended to differential conversion and followed cascaded connection like differential to differential and final output in differential . Attached the schematic in above , please check and verify our connection is right and will work or do we need to do any changes in schematic ...

0 Sima Jalaleddine over 2 years ago in reply to Sooraj Surendran

TI__Mastermind 28915 points

Hello Sooraj,

What is your input impedance at WBC_I/P? This will help determine if the resistors at the input of the first stage need to be altered for symmetry of the two paths of the FDA.

The cascading is correct.

Thank you,

Sima

0 Sooraj Surendran over 2 years ago in reply to Sima Jalaleddine

Prodigy 90 points

Hi Sima
Thank you ..

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THS4551: THS4551 Support