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LTC6362

Category: Hardware
Product Number: LTC6362

I am currently working on the LTC6362 operational amplifier using the DC1833 development board and experiencing an issue with the output biasing.

I have applied a 5V supply voltage to the board, and I am providing an 8V peak-to-peak single input signal. However, I observe that the output voltage is not biased at 2.5V as expected. Instead, I am measuring a peak-to-peak output voltage of 4V, both positive and negative.

To troubleshoot this biasing issue, I have attempted direct voltage application at the Vocm pin using various values ranging from 1V to 3.5V. Despite these attempts, I have been unable to achieve the desired bias level at the output.

I have thoroughly reviewed the datasheet and application notes for the LTC6362, as well as following the recommended guidelines for biasing and configuration. However, I have been unable to resolve this biasing issue.

I would greatly appreciate your assistance in understanding and resolving this problem. Could you please provide guidance or suggestions on how to properly bias the LTC6362 on the DC1833 development board to achieve the desired bias level at the output? Additionally, any insights or recommendations for potential troubleshooting steps would be precious.

I have attached pictures for reference.

Board:

 

Output when 8V peak-to-peak single-ended input applied at J2:

Output when 1Vdc is applied at Vocm Pin:

Output when 1.5Vdc applied at Vocm Pin:

Output when 2Vdc applied at Vocm Pin:

Output when 2.5Vdc applied at Vocm Pin:

Output when 3Vdc applied at Vocm Pin:

Output when 3.5Vdc applied at Vocm Pin:



I have added output pictures for reference
[edited by: usmanmushtaq at 1:10 PM (GMT -4) on 3 Jul 2023]
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